CN103437458A - Precast concrete double-board shear wall with internal inclined braces and construction method for same - Google Patents
Precast concrete double-board shear wall with internal inclined braces and construction method for same Download PDFInfo
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- CN103437458A CN103437458A CN2013104018599A CN201310401859A CN103437458A CN 103437458 A CN103437458 A CN 103437458A CN 2013104018599 A CN2013104018599 A CN 2013104018599A CN 201310401859 A CN201310401859 A CN 201310401859A CN 103437458 A CN103437458 A CN 103437458A
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- 239000011178 precast concrete Substances 0.000 title claims abstract description 58
- 238000010276 construction Methods 0.000 title abstract description 4
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 238000012423 maintenance Methods 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 8
- 238000011065 in-situ storage Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 3
- 239000011376 self-consolidating concrete Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 241001669679 Eleotris Species 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
The invention discloses a precast concrete double-board shear wall with internal inclined braces. The precast concrete double-board shear wall with the internal inclined braces comprises precast concrete wall sheets, cavities, truss steel bars, additional steel bar mesh sheets and the inclined braces, wherein horizontal steel bars and vertical steel bars are arranged in the precast concrete wall sheets; the precast concrete wall sheets are connected by the truss steel bars; the cavities are formed in the middles of the precast concrete wall sheets; the inclined braces are located in the cavities and is X-shaped; the inclined braces penetrate through the truss steel bars when encountering the truss steel bars; cast-in-place concrete is filled in the cavities; and the splicing sections of the double-board shear wall are provided with splicing joints, and the additional steel bar mesh sheets are additionally arranged at the splicing joints. According to the precast concrete double-board shear wall with the internal inclined braces, the bearing force, the ductility, energy consumption and other anti-seismic performances of a wall body are improved. The invention further provides a construction method for the precast concrete double-board shear wall with the internal inclined braces.
Description
Technical field
The invention belongs to a kind of half prefabricated assembled shear wall, the method for built-in oblique support while being specifically related to the two plate shear walls of a kind of precast concrete and body of wall splicing thereof.
Background technology
Whole world building trade is just towards the industrialization future development, and the prefabricated costruction system is the only way of realizing industrialization of construction industry.The superimposed fabricated construction system industrialization degree of Germany's research and development is high, and ripe in the research eighties in last century, promoted the nineties rapidly, is introduced in recent years domestic.Germany is an earthquake country less, and this system is not considered shockproof requirements at the beginning of design, and China's earthquake takes place frequently, and shear wall is as a kind of widely used lateral resistant member, and its anti-seismic performance plays vital effect to the antidetonation of building structure.
Existing to the body of wall improvement project in, prefabricated pair of plate shear wall of monolithic generally adopted to the sleeper method of setting up; Place the reinforcing cage of a configuration stirrup and longitudinal reinforcement during the body of wall splicing at edge joint position; And between body of wall and levels structurally be connected the longitudinal reinforcement that relies on the sleeper position and the joint bar in body of wall thereof.Result of the test show that the anti-seismic performances such as bearing capacity, relative storey displacement, ductility and power consumption of the two plate shear walls of precast concrete are all lower than the ordinary concrete shear wall.In the higher area of seismic fortification intensity, the Safety Redundancy less of the two plate shear walls of precast concrete may cause because of the destruction of local body of wall the weakening of overall structure shock resistance when earthquake occurs.
Summary of the invention
The object of the invention is to improve the anti-seismic performances such as bearing capacity, ductility and power consumption of body of wall, a kind of two plate shear walls of precast concrete of built-in oblique support are provided.
Another object of the present invention is to provide a kind of job practices of the two plate shear walls of precast concrete of built-in oblique support.
The technical solution used in the present invention is: the two plate shear walls of a kind of precast concrete of built-in oblique support, comprise pre-cast concrete walling sheet, cavity, truss bars, additional bar net sheet and oblique support, be provided with horizontal reinforcement and vertical reinforcement in described pre-cast concrete walling sheet, the pre-cast concrete walling sheet is connected by truss bars, form cavity in the middle of the pre-cast concrete walling sheet, described oblique support is arranged in cavity, be X-shaped, when running into truss bars, oblique support through truss bars, is filled with cast-in-situ concrete in cavity;
The splice sections of described pair of plate shear wall is provided with splicing seams, and the splicing seams place is equipped with additional bar net sheet, and usually additional bar net sheet is put into cavity, finally cast-in-situ concrete in cavity after colligation or welding together with oblique support.
As preferably, described truss bars should be established as much as possible less in oblique supporting zone, gets 1～4 and is advisable.
As preferably, described splicing seams width is between 10mm～50mm.
As preferably, described oblique the be supported for oblique support of reinforcing bar, the oblique support of steel plate or the oblique support of shaped steel.The oblique support of the reinforcing bar of one of them direction is comprised of 2～6 oblique reinforcing bars that are arranged in parallel, and the oblique reinforcing bar of both direction intersects and is X-shaped.
As preferably, described oblique support is connected and can adopts colligation or welding with additional bar net sheet.
As preferably, described cast-in-situ concrete can be ordinary concrete, the self-compacting concrete of recommendation without vibration, and this is because the operational difficulty that vibrates is set after oblique support.
As preferably, described oblique support must be carried out suitable anchoring, and anchorage length meets existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations.The anchoring of described oblique support can be positioned at the two plate shear wall edge members of precast concrete, can be arranged in beam, also can be anchored in edge member and beam simultaneously.
The job practices of the two plate shear walls of the precast concrete of above-mentioned built-in oblique support comprises the following steps:
While in the monolithic body of wall, oblique support being set:
1) factory's inner machine equipment carries out horizontal reinforcement, vertical reinforcement blanking and is welded into the net sheet, produce suitable truss bars according to the body of wall height, treat that above-mentioned raw material are ready and carry out the production of pre-cast concrete walling sheet, be transported to on-site hoisting when maintenance reaches some strength;
2) oblique support is set, oblique support base can anchor in shear wall edge member or beam, and anchorage length will meet existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations;
3) if the shear wall edge member is on-the-spot cast-in-place, the reinforcing bar at colligation edge member and other position;
4) formwork;
5) concreting, adopt self-compact concrete;
6) form removal, maintenance;
When the body of wall splicing arranges oblique support:
1) factory's inner machine equipment carries out horizontal reinforcement, vertical reinforcement blanking and is welded into the net sheet, produce suitable truss bars according to the body of wall height, treat that above-mentioned raw material are ready and carry out the production of pre-cast concrete walling sheet, be transported to on-site hoisting when maintenance reaches some strength;
2) can carry out colligation or the welding of oblique support in plant produced pre-cast concrete walling sheet, oblique support usually and additional bar net sheet link together;
3) oblique support is together put into to the cavity of body of wall splicing place together with additional bar net sheet, splicing seams place additional bar net sheet and oblique bearing length will meet existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations;
4) the body of wall external bracing is set, body of wall off normal while preventing from building;
5) concreting, adopt self-compact concrete;
6) form removal, maintenance.
Beneficial effect of the present invention:
1, oblique support can effectively improve the antidetonation indexs such as bearing capacity, ductility and power consumption of the two plate shear walls of precast concrete;
2. when the two plate shear walls of precast concrete splice, adopt oblique support can effectively improve splicing place stress performance, increase the antidetonation indexs such as bearing capacity, ductility and power consumption;
3. oblique support can increase the areas of plasticity hinge of body of wall, can postpone the time of occurrence in crack, delays the development speed of crackle, and Crack prevention is too concentrated.
The accompanying drawing explanation
Fig. 1 is the two plate shear wall horizontal sectional views of precast concrete of the present invention.
Fig. 2 is the two plate shear wall elevation of monolithic precast concrete of the present invention.
Fig. 3 is the two plate shear wall splicing place profiles of two precast concretes of the present invention.
Fig. 4 is the two plate shear wall splicing place elevation of two precast concretes of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As Figure 1-4, the two plate shear walls of a kind of precast concrete of built-in oblique support, comprise pre-cast concrete walling sheet 1, cavity 3, truss bars 2, additional bar net sheet 6, splicing seams 8 and oblique support 7, be provided with horizontal reinforcement 4 and vertical reinforcement 5 in described pre-cast concrete walling sheet, pre-cast concrete walling sheet 1 is connected by truss bars 2, form cavity 3 in the middle of pre-cast concrete walling sheet 1, described oblique support 7 is arranged in cavity 3, be X-shaped, when running into truss bars 2, oblique support 7 through truss bars 2, in cavity 3, is filled with cast-in-situ concrete; The splice sections of described pair of plate shear wall is provided with splicing seams 8, and splicing seams 8 places are equipped with additional bar net sheet 6.
Described truss bars 2 is provided with 1～4 in oblique support 7 zones, and described splicing seams 8 width are between 10mm～50mm, and described oblique support 7 is the oblique support of reinforcing bar, the oblique support of steel plate or the oblique support of shaped steel.The oblique support of the reinforcing bar of one of them direction is comprised of 2～6 oblique reinforcing bars that are arranged in parallel, the oblique reinforcing bar of both direction intersects and is X-shaped, described oblique support 7 is connected and can adopts colligation or welding with additional bar net sheet 6, described cast-in-situ concrete is self-compacting concrete, described oblique support 7 must be carried out suitable anchoring, the anchoring of described oblique support 7 can be positioned at the two plate shear wall edge members of precast concrete, can be arranged in beam, also can be anchored in edge member and beam simultaneously.
The job practices of the two plate shear walls of the precast concrete of above-mentioned built-in oblique support comprises the following steps:
While in the monolithic body of wall, oblique support being set:
1) factory's inner machine equipment carries out horizontal reinforcement 4, vertical reinforcement 5 blankings and is welded into the net sheet, produce suitable truss bars 2 according to the body of wall height, treat that above-mentioned raw material are ready and carry out pre-cast concrete walling sheet 1 production, be transported to on-site hoisting when maintenance reaches some strength;
2) oblique support 7 is set, oblique support 7 bottoms can anchor in shear wall edge member or beam 9, and anchorage length will meet existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations;
3) if the shear wall edge member is on-the-spot cast-in-place, the reinforcing bar at colligation edge member and other position;
4) formwork;
5) concreting, add after oblique support 7 operational difficulty that vibrates, and suggestion adopts self-compact concrete;
6) form removal, maintenance.
When the body of wall splicing arranges oblique support:
1) factory's inner machine equipment carries out horizontal reinforcement 4, vertical reinforcement 5 blankings and is welded into the net sheet, produce suitable truss bars 2 according to the body of wall height, treat that above-mentioned raw material are ready and carry out pre-cast concrete walling sheet 1 production, be transported to on-site hoisting when maintenance reaches some strength;
2) can carry out colligation or the welding of oblique support 7 in plant produced pre-cast concrete walling sheet 1, oblique support 7 usually and additional bar net sheet 6 link together;
3) oblique support 7 is together put into to the cavity 3 of body of wall splicing place together with additional bar net sheet 6.Splicing seams place additional bar net sheet 6 and oblique bearing length will meet existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations;
4) the body of wall external bracing is set, body of wall off normal while preventing from building;
5) concreting, add after oblique support the operational difficulty that vibrates, and suggestion adopts self-compact concrete;
6) form removal, maintenance.
It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.In the present embodiment not clear and definite each ingredient all available prior art realized.
Claims (9)
1. two plate shear walls of the precast concrete of a built-in oblique support, it is characterized in that: comprise pre-cast concrete walling sheet, cavity, truss bars, additional bar net sheet and oblique support, be provided with horizontal reinforcement and vertical reinforcement in described pre-cast concrete walling sheet, the pre-cast concrete walling sheet is connected by truss bars, form cavity in the middle of the pre-cast concrete walling sheet, described oblique support is arranged in cavity, is X-shaped, when running into truss bars, oblique support through truss bars, is filled with cast-in-situ concrete in cavity; The splice sections of described pair of plate shear wall is provided with splicing seams, and the splicing seams place is equipped with additional bar net sheet.
2. two plate shear walls of the precast concrete of built-in oblique support according to claim 1, it is characterized in that: described truss bars arranges 1～4 in oblique supporting zone.
3. two plate shear walls of the precast concrete of built-in oblique support according to claim 1, it is characterized in that: described splicing seams width is between 10mm～50mm.
4. the two plate shear walls of the precast concrete of built-in oblique support according to claim 1, is characterized in that: described oblique the be supported for oblique support of reinforcing bar, the oblique support of steel plate or the oblique support of shaped steel.
5. two plate shear walls of the precast concrete of built-in oblique support according to claim 4, it is characterized in that: the described oblique oblique support of reinforcing bar that is supported for, the oblique support of the reinforcing bar of one of them direction is comprised of 2～6 oblique reinforcing bars that are arranged in parallel, and the oblique reinforcing bar of both direction intersects and is X-shaped.
6. two plate shear walls of the precast concrete of built-in oblique support according to claim 1, it is characterized in that: described oblique support is connected employing colligation or welding with additional bar net sheet.
7. two plate shear walls of the precast concrete of built-in oblique support according to claim 1, it is characterized in that: described cast-in-situ concrete is self-compacting concrete.
8. two plate shear walls of the precast concrete of built-in oblique support according to claim 1, it is characterized in that: the anchoring of described oblique support is positioned at the two plate shear wall edge members of precast concrete, or be arranged in beam, or be anchored in edge member and beam simultaneously.
9. the job practices of the two plate shear walls of the precast concrete of built-in oblique support according to claim 1 is characterized in that: comprise the following steps:
While in the monolithic body of wall, oblique support being set:
1) factory's inner machine equipment carries out horizontal reinforcement, vertical reinforcement blanking and is welded into the net sheet, produce suitable truss bars according to the body of wall height, treat that above-mentioned raw material are ready and carry out the production of pre-cast concrete walling sheet, be transported to on-site hoisting when maintenance reaches some strength;
2) oblique support is set, oblique support base can anchor in shear wall edge member or beam, and anchorage length will meet existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations;
3) if the shear wall edge member is on-the-spot cast-in-place, the reinforcing bar at colligation edge member and other position;
4) formwork;
5) concreting, adopt self-compact concrete;
6) form removal, maintenance;
When the body of wall splicing arranges oblique support:
1) factory's inner machine equipment carries out horizontal reinforcement, vertical reinforcement blanking and is welded into the net sheet, produce suitable truss bars according to the body of wall height, treat that above-mentioned raw material are ready and carry out the production of pre-cast concrete walling sheet, be transported to on-site hoisting when maintenance reaches some strength;
2) carry out colligation or the welding of oblique support in plant produced pre-cast concrete walling sheet, oblique support and additional bar net sheet link together;
3) oblique support is together put into to the cavity of body of wall splicing place together with additional bar net sheet, splicing seams place additional bar net sheet and oblique bearing length will meet existing " seismic design provision in building code " and " technical specification for concrete structures of high-rise building " relevant regulations;
4) the body of wall external bracing is set, body of wall off normal while preventing from building;
5) concreting, adopt self-compact concrete;
6) form removal, maintenance.
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