CN102182251B - Bottom chord node fastening device of multi-suspend structure and fastening tension method thereof - Google Patents
Bottom chord node fastening device of multi-suspend structure and fastening tension method thereof Download PDFInfo
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- CN102182251B CN102182251B CN 201110087424 CN201110087424A CN102182251B CN 102182251 B CN102182251 B CN 102182251B CN 201110087424 CN201110087424 CN 201110087424 CN 201110087424 A CN201110087424 A CN 201110087424A CN 102182251 B CN102182251 B CN 102182251B
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Abstract
The invention relates to a node fastening device, in particular to a bottom chord node fastening device of a multi-suspend structure for a building steel structure and a fastening tension method thereof. The upper end of a support rod connecting piece is a support rod transition step; a groove with downward opening is arranged in the middle of the support rod connecting piece; a cableway fixing seat is matched with and firmly fixed to the support rod connecting piece; a cable passing vertical rod is arranged in the middle of the cableway fixing seat; the upper end of the cable passing vertical rod is a downward-concave groove; the cable passing vertical rod is matched with the groove; the groove and the downward-concave groove form a cable passing pore path; and the dragging of primary and secondary cables is realized in the way of fastening and then fastening prestressing cables. The bottom chord node fastening device of multi-suspend structure and the fastening tension method thereof are reasonable in structure, high in construction precision and construction efficiency and low in construction cost, and enhance the safety of steel structure.
Description
Technical field
Patent of the present invention relates to a kind of node fastener, relates in particular to lower-chord panel point fastener and fastening method for stretching thereof that a kind of multiple string that is used for construction steel structure props up structure.
Background technology
It is a kind of novel hybridization prestressed large-span space structures system that the single-layer lattice shell and the flexible cable-strut system of rigidity are combined that existing string props up latticed shell structure, adapts to space structures large span, light-duty, reasonable stress, succinct development trend.It has improved the resistance to overturning of top single-layer lattice shell structure on the one hand, makes structure can cross over bigger space; On the other hand, string props up latticed shell structure and has certain initial stiffness, and its design, construction forming and joint structure are compared with full flexible structures such as rope domes and obtained bigger simplification.In addition, two kinds of structural systems are cancelled out each other to the effect of bearing, make structure become self equilibrium systems; When giving full play to single-layer lattice shell structure stress advantage, can make full use of the high-strength pull resistance of rope material; The distribution of internal force of adjustment system reduces the internal force amplitude, thereby improves structure bearing capacity.And multiple string props up structure is that a kind of novel string props up the latticed shell structure form; Its cable-strut system divides the primary and secondary rope, and separation, and wherein the main rope termination is positioned at truss end, capital place; And the every end of inferior rope termination is positioned at truss span 1/5 place; And 1/5 place through the vertical strut in first place of two tacklines and adjacent truss end on the end node place be connected, such layout makes member stress more reasonable, system more succinctly, moulding is more attractive in appearance.But also brought a series of problems simultaneously, in truss string structure, the difficult and vertical strut of the prestressed cable of lower edge effectively is connected and is fastening; Cause drag-line eccentric easily; Increase frictional force, loss of prestress is bigger, the stressed flexing of securing member; And string props up rope, the strut of latticed shell structure, actual internal force size and the distribution and the different design of net mould component after finally causing pre-stress construction to be accomplished, and this will have a negative impact to the mechanical property that whole string props up structure.
String props up latticed shell structure pre-stress construction common method at present has: (1) subsection tension rope method.(2) two ends stretch-draw jacking vertical rod method.And rope and vertical strut between geometrical relationship and frictional property between the two, tension sequence etc. must influence loss of prestress; And string props up rope, the strut of latticed shell structure, actual internal force size and the distribution and the different design of net mould component after finally causing pre-stress construction to be accomplished, and this will have a negative impact to the mechanical property that whole string props up structure.
Summary of the invention
The present invention solves the deficiency that exists in the prior art, provides that a kind of that multiple string is propped up latticed shell structure lower edge prestressed cable is fastening and prop up the lower-chord panel point fastener and the fastening method for stretching thereof of structure with the multiple string that strut effectively is connected.
Above-mentioned technical problem of the present invention mainly is able to solve through following technical proposals:
A kind of multiple string props up the lower-chord panel point fastener of structure; Comprise the strut connector, the upper end of described strut connector is the strut transition shoulder, and described strut connector middle part is provided with the groove that Open Side Down; Be complementary with the strut connector and be fastened with the cableway holder; Described cableway holder middle part is provided with the montant of reeving, and the upper end of the described montant of reeving is a low groove, and described montant and the groove of reeving is complementary; Described groove and low groove form the duct of reeving, and the described duct of reeving is the trend curve shape.
Beat the slope and handle at strut transition shoulder place, the double fierce backing plate that is connected such as do that strut and fastener are taked.When rope penetrates the duct, through in the cableway holder of lower end, being screwed in the strut connector of high-strength bolt to upper end, reach the lower edge prestressed cable fastening and with the effective purpose of connecting of strut; Pull bar engaging lug buttress is welded in upper end strut connector sidewall according to the angle between pull bar and the strut.
The present invention has following advantage:
(1), construction precision is high.Owing to adopted multiple string to prop up the lower-chord panel point fastener of structure; Can be simpler, accurate and effective to carry out lower-chord panel point fastening; Make that this fastener still can step up continuous rope behind Suo Shouli, be not shifted, and can prevent the off-centre of drag-line; Reduce the loss of stretching force, not can to drag-line exert an influence and also attractive in appearance, antiseptic effect is good.Therefore guaranteed drag-line, the prestressing force precision of vertical strut etc.
(2), construction cost is low.The multiple string that adopts props up the lower-chord panel point fastener simple structure, easy to operate of structure, and construction precision is high, can avoid adjusting repeatedly the resources such as time, manpower and materials of Suo Li, so construction cost reduces significantly.
(3), structure is safe in utilization.Because it is fastening to adopt steel-casting to carry out, its bearing capacity is high, and can effectively prevent when the stretch-draw of lower edge drag-line the local failure of securing member is prevented the stressed flexing of securing member, has increased the safety of structure.
(4), construction efficiency is high.Multiple string prop up latticed shell structure adopt stage by stage, in batches, classification symmetry method for stretching speed of application is fast, method is simple, effect is obvious.
As preferably, the groove in the described strut connector is " ∩ " type, and the low groove in the described montant of reeving is " ∪ " type, and described cableway holder is " ⊥ " type, and the cableway face in the described duct of reeving is provided with a mao tooth.
As preferably, the radian of described groove upper end is 170 °～180 °, and the radian of described low groove is 150 °～170 °, and the low groove internal diameter is than the little 2～3mm of groove internal diameter, and the height of described hair tooth is 1～2mm.
As preferably; The sidewall of described strut connector is provided with more than one pull bar and connects otic placode; Described pull bar connects otic placode and the strut connector is the shape distribution that is inclined upwardly; Described pull bar connects otic placode and is provided with connecting hole, and described cableway holder and strut connector are fastened through 4 groups of high-strength bolts, and 4 groups of high-strength bolts are evenly distributed on the bottom of cableway holder.
The bottom of strut connector is provided with the bolt blind hole.
As preferably, the sidewall of described strut connector is provided with a pair of pull bar and connects otic placode, and described pull bar connects otic placode and is and is dislocatedly distributed.
As preferably, the bottom of described strut connector and cableway holder is cylindric, and described cableway holder is integrated with the montant of reeving, and described strut connector and cableway holder are steel-casting.
Multiple string props up the fastening method for stretching of the lower-chord panel point of structure, according to the following steps:
(1), fastening:
1., with fierce lower ends that is connected to strut such as strut connectors;
Etc. strong weld: the welding that is exactly same intensity.
2., the utilization rotating disk puts rope, adopt to move the flatcar method and decontroled drag-line gradually to the other end by truss one end, makes drag-line keep the linearity migration to installing on the moulding bed and lying low;
For prevent that cable body from contacting with ground in moving process, damage lasso protection layer or damage strand.
3., adopt the traction jack drag-line to be promoted at the truss two ends, when drag-line is reserved accurate sign near the groove lower end 10～50mm of strut connector, that an end Cable head is in place; In lifting process; With 1/2 span place distance is the control target, starts the oil pump of the truss other end, one by one drag-line is reserved in the groove that accurate sign embeds all strut connectors of this Pin from the bottom up from the Cable head end to end; And the montant of reeving of cableway holder snapped in the groove; And screw in blind hole in cableway holder bottom screw and the strut connector to high-strength bolt, and fix drag-line, cableway holder and strut connector and locate, other end Cable head is in place;
Therefore the rope head is introduced bearing, and cable body snaps in fastener.
4., the diagonal angle tightens four high-strength bolts, holds out against the duct of reeving until rope; And the like accomplish the installation of other nodes and drag-line;
(2), fastening prestressed cable:
After the step (1), to all main, inferior Suo Jinhang drag-line pretension;
Main rope pretension: take the synchronous grading tension method in every truss structure two ends, by the order stretch-draw main rope of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre; The ultra stretch-draw to 110% of every truss structure two ends main rope stretch-draw point～115% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 110%～115%;
Every truss structure: with a certain main stress system of structure is a truss structure.
The method of synchronous grading tension method: make prestressed cable and latticed shell structure progressively get into stress, prevent that local component damage from reaching, malformation.
Single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 110%～115%: the classification of single synchronous tension refer to every batch, every truss structure two ends cable stretching point simultaneously, synchronously, grading tension; Every symmetrical stretch-draw two Pin are one batch; 0% → 25% → 50% → 70% → 90% → 110%～115%; Refer to through the stretch-draw prestressing force rope, make construction stretching power from 0% → 25% → 50% → 70% → 90% → 110%～115% (theoretical construction stretching power).
Inferior rope pretension: take the synchronous grading tension method in every truss structure two ends, according to the order stretch-draw of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre time rope; Time ultra stretch-draw of cable stretching point of every truss structure two ends is to 105% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 105%; All of stretch-draw rope is accomplished successively.
Single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 105%～110%:0% → 25% → 50% → 70% → 90% → 105%～110%; Refer to through the stretch-draw prestressing force rope, make construction stretching power from 0% → 25% → 50% → 70% → 90% → 105%～110% (theoretical construction stretching power).
As preferably, in the step (2), in stretching process, consider of the influence of time cable stretching to main rope stretch-draw, main rope pre-stress construction controlling value Duos 5%～10% than time ultra stretch-draw of rope pre-stress construction controlling value.
Therefore, a kind of multiple string of the present invention props up the lower-chord panel point fastener and the fastening method for stretching thereof of structure, and is rational in infrastructure, and construction precision is high, and construction cost is low, increases the steel work safety, and construction efficiency is high.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A sectional structure sketch map of Fig. 1;
Fig. 3 is the structural representation of support joint element for bar of the present invention;
Fig. 4 is the structural representation of cableway holder among the present invention;
Fig. 5 is the structural representation of band strut among the present invention;
Fig. 6 is the sketch map of symmetrical stretch-draw main rope among the present invention;
Fig. 7 is the sketch map of symmetrical stretch-draw time rope among the present invention;
Fig. 8 is the sectional structure sketch map of cableway face among the present invention;
Fig. 9 is single Pin truss string structure main rope structural representation among the present invention;
Figure 10 is single Pin truss string structure time Cable Structure sketch map among the present invention;
Figure 11 is the structural representation of stretch-draw flow process I among the present invention;
Figure 12 is the structural representation of stretch-draw flow process II among the present invention;
Figure 13 is the structural representation of stretch-draw flow process III among the present invention;
Figure 14 is the structural representation of stretch-draw flow process IV among the present invention.
The specific embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment 1: like Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 8, a kind of multiple string props up the lower-chord panel point fastener of structure, comprises strut connector 1; The upper end of described strut connector 1 is a strut transition shoulder 2, and described strut connector 1 middle part is provided with the groove 3 that Open Side Down, and being complementary with strut connector 1 is fastened with cableway holder 4; The bottom of strut connector 1 and cableway holder 4 is cylindric, and strut connector 1 is a steel-casting with cableway holder 4, and described cableway holder 4 middle parts are provided with the montant 5 of reeving; Cableway holder 4 is integrated with the montant 5 of reeving, and the upper end of the described montant 5 of reeving is a low groove 6, and the described montant 5 of reeving is complementary with groove 3; Described groove 3 forms the duct 7 of reeving with low groove 6, and the described duct 7 of reeving is the trend curve shape, and the groove 3 in the described strut connector 1 is " ∩ " type; Low groove 6 in the described montant 5 of reeving is " ∪ " type; Described cableway holder 4 is " ⊥ " type, and the cableway face 13 in the described duct 7 of reeving is provided with mao tooth 14, and the radian of described groove 3 upper ends is 170 °; The radian of described low groove 6 is 150 °; The low groove internal diameter is than the little 2mm of upper groove internal diameter, and the height of described hair tooth is 1mm, and the sidewall of described strut connector 1 is provided with more than one pull bar and connects otic placode 8; Described pull bar connects otic placode 8 and is the shape distribution that is inclined upwardly with strut connector 1; Described pull bar connects otic placode 8 and is provided with connecting hole 9, and described cableway holder 4 is fastened through 4 groups of high-strength bolts 10 with strut connector 1, and 4 groups of high-strength bolts 10 are evenly distributed on the bottom of cableway holder 4; The sidewall of described strut connector 1 is provided with a pair of pull bar and connects otic placode 8, and described pull bar connects otic placode 8 and is and is dislocatedly distributed.
Like Fig. 5, Fig. 6 and shown in Figure 7, multiple string props up the fastening method for stretching of the lower-chord panel point of structure, and is progressive according to the following steps:
(1), fastening:
1., with fierce lower ends that is connected to strut such as strut connectors;
2., the utilization rotating disk puts rope, adopt to move the flatcar method and decontroled drag-line gradually to the other end by truss one end, makes drag-line keep the linearity migration to installing on the moulding bed and lying low;
3., adopt the traction jack drag-line to be promoted at the truss two ends, when drag-line is reserved accurate sign near the groove lower end 10mm of strut connector, that an end Cable head is in place; In lifting process; With 1/2 span place distance is the control target, starts the oil pump of the truss other end, one by one drag-line is reserved in the groove that accurate sign embeds all strut connectors of this Pin from the bottom up from the Cable head end to end; And the montant of reeving of cableway holder snapped in the groove; And screw in blind hole in cableway holder bottom screw and the strut connector to high-strength bolt, and fix drag-line, cableway holder and strut connector and locate, other end Cable head is in place;
4., the diagonal angle tightens four high-strength bolts, holds out against the duct of reeving until rope; And the like accomplish the installation of other nodes and drag-line;
(2), fastening prestressed cable:
After the step (1), to all main, inferior Suo Jinhang drag-line pretension;
Main rope pretension: take the synchronous grading tension method in every truss structure two ends, by the order stretch-draw main rope of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre; Main rope stretch-draw point ultra stretch-draw in every truss structure two ends is to 110% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 110%;
Inferior rope pretension: take the synchronous grading tension method in every truss structure two ends, according to the order stretch-draw of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre time rope; Time ultra stretch-draw of cable stretching point of every truss structure two ends is to 105% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 105%; All of stretch-draw rope is accomplished successively;
In the step (2), in stretching process, consider the influence of time cable stretching to main rope stretch-draw, main rope pre-stress construction controlling value Duos 5% than time ultra stretch-draw of rope pre-stress construction controlling value.
Like Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13 and shown in Figure 14,
Fig. 9 is single Pin truss string structure main rope elevation;
Figure 10 is single Pin truss string structure time rope elevation;
Figure 11 is the fierce lower ends that are connected to strut such as strut connector;
Figure 12 is the prestressed rope, and fastening;
Figure 13 is the synchronous grading tensions in two ends;
Figure 14 finishes for stretch-draw.
The technique effect that is reached:
1, behind the Suo Shouli, relative slide displacement amount is 0 between fastener and continuous rope;
2, each Pin drag-line is in stretching process, and Suo Li influences each other less, within 10% scope;
3, reduce the loss of stretching force in the rope, Suo Li and design Suo Li differ within 4% scope, and structural element is (98 ~ 102) % design force value at the operational phase component internal force;
4, in the drag-line stretching process, bearing horizontal movement＜10mm.
Embodiment 2:
Multiple string props up the fastening method for stretching of the lower-chord panel point of structure, and is progressive according to the following steps:
(1), fastening:
1., with fierce lower ends that is connected to strut such as strut connectors;
2., the utilization rotating disk puts rope, adopt to move the flatcar method and decontroled drag-line gradually to the other end by truss one end, makes drag-line keep the linearity migration to installing on the moulding bed and lying low;
3., adopt the traction jack drag-line to be promoted at the truss two ends, when drag-line is reserved accurate sign near the groove lower end 30mm of strut connector, that an end Cable head is in place; In lifting process; With 1/2 span place distance is the control target, starts the oil pump of the truss other end, one by one drag-line is reserved in the groove that accurate sign embeds this Pin all and strut connector from the bottom up from the Cable head end to end; And the montant of reeving of cableway holder snapped in the groove; And screw in blind hole in cableway holder bottom screw and the strut connector to high-strength bolt, and fix drag-line, cableway holder and strut connector and locate, other end Cable head is in place;
4., the diagonal angle tightens four high-strength bolts, holds out against the duct of reeving until rope; And the like accomplish the installation of other nodes and drag-line;
(2), fastening prestressed cable:
After the step (1), to all main, the inferior drag-line pretension that carries out;
Main rope pretension: take the synchronous grading tension method in every truss structure two ends, by the order stretch-draw main rope of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre; Main rope stretch-draw point ultra stretch-draw in every truss structure two ends is to 113% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 113%;
Inferior rope pretension: take the synchronous grading tension method in every truss structure two ends, according to the order stretch-draw of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre time rope; Time ultra stretch-draw of cable stretching point of every truss structure two ends is to 105% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 108%; All of stretch-draw rope is accomplished successively;
In the step (2), in stretching process, consider the influence of time cable stretching to main rope stretch-draw, main rope pre-stress construction controlling value Duos 8% than time ultra stretch-draw of rope pre-stress construction controlling value.
The technique effect that is reached:
1, behind the Suo Shouli, relative slide displacement amount is 0 between fastener and continuous rope;
2, each Pin drag-line is in stretching process, and Suo Li influences each other less, within 10% scope;
3, reduce the loss of stretching force in the rope, Suo Li and design Suo Li differ within 4% scope, and structural element is (98 ~ 102) % design force value at the operational phase component internal force;
4, in the drag-line stretching process, bearing horizontal movement＜10mm.
Embodiment 3:
Multiple string props up the fastening method for stretching of the lower-chord panel point of structure, and is progressive according to the following steps:
(1), fastening:
1., with fierce lower ends that is connected to strut such as strut connectors;
2., the utilization rotating disk puts rope, adopt to move the flatcar method and decontroled drag-line gradually to the other end by truss one end, makes drag-line keep the linearity migration to installing on the moulding bed and lying low;
3., adopt the traction jack drag-line to be promoted at the truss two ends, when drag-line is reserved accurate sign near the groove lower end 50mm of strut connector, that an end Cable head is in place; In lifting process; With 1/2 span place distance is the control target, starts the oil pump of the truss other end, one by one drag-line is reserved in the groove that accurate sign embeds this Pin all and strut connector from the bottom up from the Cable head end to end; And the montant of reeving of cableway holder snapped in the groove; And screw in blind hole in cableway holder bottom screw and the strut connector to high-strength bolt, and fix drag-line, cableway holder and strut connector and locate, other end Cable head is in place;
4., the diagonal angle tightens four high-strength bolts, holds out against the duct of reeving until rope; And the like accomplish the installation of other nodes and drag-line;
(2), fastening prestressed cable:
After the step (1), to all main, the inferior drag-line pretension that carries out;
Main rope pretension: take the synchronous grading tension method in every truss structure two ends, by the order stretch-draw main rope of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre; Main rope stretch-draw point ultra stretch-draw in every truss structure two ends is to 115% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 115%;
Inferior rope pretension: take the synchronous grading tension method in every truss structure two ends, according to the order stretch-draw of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre time rope; Time ultra stretch-draw of cable stretching point of every truss structure two ends is to 105% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 110%; All of stretch-draw rope is accomplished successively;
In the step (2), in stretching process, consider the influence of time cable stretching to main rope stretch-draw, main rope pre-stress construction controlling value Duos 10% than time ultra stretch-draw of rope pre-stress construction controlling value.
The technique effect that is reached:
1, behind the Suo Shouli, relative slide displacement amount is 0 between fastener and continuous rope;
2, each Pin drag-line is in stretching process, and Suo Li influences each other less, within 10% scope;
3, reduce the loss of stretching force in the rope, Suo Li and design Suo Li differ within 4% scope, and structural element is (98 ~ 102) % design force value at the operational phase component internal force;
4, in the drag-line stretching process, bearing horizontal movement＜10mm.
Claims (8)
1. a multiple string props up the lower-chord panel point fastener of structure; It is characterized in that: comprise strut connector (1), the upper end of described strut connector (1) is strut transition shoulder (2), and described strut connector (1) middle part is provided with the groove that Open Side Down (3); Be complementary with strut connector (1) and be fastened with cableway holder (4); Described cableway holder (4) middle part is provided with the montant of reeving (5), and the upper end of the described montant of reeving (5) is low groove (6), and the described montant of reeving (5) is complementary with groove (3); Described groove (3) and low groove (6) form the duct (7) of reeving, and the described duct of reeving (7) is the trend curve shape.
2. multiple string according to claim 1 props up the lower-chord panel point fastener of structure; It is characterized in that: the groove (3) in the described strut connector (1) is " ∩ " type; Low groove (6) in the described montant of reeving (5) is " ∪ " type; Described cableway holder (4) is " ⊥ " type, and the cableway face (13) in the described duct of reeving (7) is provided with a mao tooth (14).
3. multiple string according to claim 2 props up the lower-chord panel point fastener of structure; It is characterized in that: the radian of described groove (3) upper end is 170 °～180 °; The radian of described low groove (6) is 150 °～170 °; The low groove internal diameter is than the little 2～3mm of groove internal diameter, and the height of described hair tooth is 1～2mm.
4. prop up the lower-chord panel point fastener of structure according to claim 1 or 2 or 3 described multiple strings; It is characterized in that: the sidewall of described strut connector (1) is provided with more than one pull bar and connects otic placode (8); Described pull bar connects otic placode (8) and is the shape distribution that is inclined upwardly with strut connector (1); Described pull bar connects otic placode (8) and is provided with connecting hole (9); Described cableway holder (4) is fastened through 4 groups of high-strength bolts (10) with strut connector (1), and 4 groups of high-strength bolts (10) are evenly distributed on the bottom of cableway holder (4).
5. multiple string according to claim 4 props up the lower-chord panel point fastener of structure, it is characterized in that: the sidewall of described strut connector (1) is provided with a pair of pull bar and connects otic placode (8), and described pull bar connects otic placode (8) and is and is dislocatedly distributed.
6. prop up the lower-chord panel point fastener of structure according to claim 1 or 2 or 3 described multiple strings; It is characterized in that: the bottom of described strut connector (1) and cableway holder (4) is cylindric; Described cableway holder (4) is integrated with the montant (5) of reeving, and described strut connector (1) and cableway holder (4) are steel-casting.
7. multiple string according to claim 1 props up the fastening method for stretching of the lower-chord panel point of structure; Multiple string props up its cable-strut system branch primary and secondary rope in the structure; And separation, wherein the main rope termination is positioned at capital place, truss end, and the every end of inferior rope termination is positioned at truss span 1/5 place; And 1/5 place through the vertical strut in first place of two tacklines and adjacent truss end on the end node place be connected, it is characterized in that according to the following steps:
(1), fastening:
1., with fierce lower ends that is connected to strut such as strut connectors;
2., the utilization rotating disk puts rope, adopt to move the flatcar method and decontroled drag-line gradually to the other end by truss one end, makes drag-line keep the linearity migration to installing on the moulding bed and lying low;
3., adopt the traction jack drag-line to be promoted at the truss two ends, when drag-line is reserved accurate sign near the groove lower end 10～50mm of strut connector, that an end Cable head is in place; In lifting process; With 1/2 span place distance is the control target, starts the oil pump of the truss other end, one by one drag-line is reserved in the groove that accurate sign embeds all strut connectors of this Pin from the bottom up from the Cable head end to end; And the montant of reeving of cableway holder snapped in the groove; And screw in blind hole in cableway holder bottom screw and the strut connector to high-strength bolt, and fix drag-line, cableway holder and strut connector and locate, other end Cable head is in place;
4., the diagonal angle tightens four high-strength bolts, holds out against the duct of reeving until rope; And the like accomplish the installation of other nodes and drag-line;
(2), fastening prestressed cable:
After the step (1), to all main, inferior Suo Jinhang drag-line pretension;
Main rope pretension: take the synchronous grading tension method in every truss structure two ends, by the order stretch-draw main rope of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre; The ultra stretch-draw to 110% of every truss structure two ends main rope stretch-draw point～115% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 110%～115%;
Inferior rope pretension: take the synchronous grading tension method in every truss structure two ends, according to the order stretch-draw of whole latticed shell structure symmetrical stretch-draw two Pin from both sides to the centre time rope; Time ultra stretch-draw of cable stretching point of every truss structure two ends is to 105% pre-stress construction controlling value, single synchronous tension classification 0% → 25% → 50% → 70% → 90% → 105%; All of stretch-draw rope is accomplished successively.
8. multiple string according to claim 7 props up the fastening method for stretching of the lower-chord panel point of structure; It is characterized in that: in the step (2); In stretching process; Consider the influence of time cable stretching to main rope stretch-draw, main rope pre-stress construction controlling value Duos 5%～10% than time ultra stretch-draw of rope pre-stress construction controlling value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110087424 CN102182251B (en) | 2011-04-08 | 2011-04-08 | Bottom chord node fastening device of multi-suspend structure and fastening tension method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN105089163A (en) * | 2015-06-24 | 2015-11-25 | 浙江东南网架股份有限公司 | Lower-chord panel point fastening device of crossed truss string structure and fastening tensioning method |
| CN106088358A (en) * | 2016-06-03 | 2016-11-09 | 北京工业大学 | A kind of strut lower node of Levy type cable dome structure |
| CN108277924A (en) * | 2018-03-14 | 2018-07-13 | 江苏恒久钢构有限公司 | The cable tension method of truss string structure |
| CN108868157A (en) * | 2018-07-24 | 2018-11-23 | 天津大学 | A kind of CFRP drag-line self-heating node |
| CN111877181A (en) * | 2020-08-27 | 2020-11-03 | 湖北宜昌攀科预应力技术服务有限公司 | Prestressed beam string tensioning structure and tensioning method thereof |
| CN113700152B (en) * | 2021-09-02 | 2022-11-25 | 山东建筑大学 | Construction method of three-fork or V-shaped web member combined string structure |
| CN114250907B (en) * | 2021-12-29 | 2023-08-15 | 中建科工集团有限公司 | Beam string structure |
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| JPH06313337A (en) * | 1993-04-30 | 1994-11-08 | Shiro Kato | Roof structure and its construction method |
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| CN101029519A (en) * | 2007-03-23 | 2007-09-05 | 北京城建集团有限责任公司 | Method for installing large-span two-way prestressed cable |
| CN201121367Y (en) * | 2007-10-31 | 2008-09-24 | 北京市建筑设计研究院 | Universal rotating spherical hinge node clamper with steel structure |
| CN101314961A (en) * | 2008-06-24 | 2008-12-03 | 浙江大学 | Dish shaped node suitable for joint of chord-tension truss stay rod and double-cable |
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