CN109695321B - Replaceable staircase composite damping support and preparation method thereof - Google Patents
Replaceable staircase composite damping support and preparation method thereof Download PDFInfo
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- CN109695321B CN109695321B CN201811610832.XA CN201811610832A CN109695321B CN 109695321 B CN109695321 B CN 109695321B CN 201811610832 A CN201811610832 A CN 201811610832A CN 109695321 B CN109695321 B CN 109695321B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
- E04F11/02—Stairways; Layouts thereof
- E04F11/022—Stairways; Layouts thereof characterised by the supporting structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Steps, Ramps, And Handrails (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a replaceable staircase composite damping support and a preparation method thereof, wherein the replaceable staircase composite damping support comprises the following steps: the energy-dissipating device comprises a sliding support arranged between a ladder beam and a ladder plate and a cantilever plate arranged on the lower portion of the ladder beam, wherein a soft steel energy-dissipating support is arranged on the cantilever plate, and the soft steel energy-dissipating support is connected with the ladder plate. According to the invention, the ladder beam is partially cantilevered outwards, and the soft steel energy dissipation support is arranged between the corresponding cantilever plate and the ladder plate, so that the limitation of the original support arrangement form on the height of the support is removed. The end parts of the ladder boards are placed on the ladder beams, the sliding supports are adopted between the ladder boards to bear vertical force, so that the soft steel energy dissipation supports only need to horizontally dislocate to play an energy dissipation role without bearing the vertical force, and the performance of the soft steel energy dissipation supports is obviously improved through improvement of the arrangement positions of the supports. The invention has simple structure, convenient design and construction and low manufacturing cost, and can realize the coexistence of safety and economy.
Description
Technical Field
The invention belongs to a building earthquake-resistant structure, and relates to a replaceable energy-consuming and sliding composite damping support for a staircase.
Background
Earthquake damage indicates that the stairwell of the frame structure is seriously damaged during earthquake, which can cause serious casualties and property loss. In order to reduce the earthquake damage of the stair structure, when the stair structure is designed to resist earthquake, a sliding support is usually arranged between the step plate and the step beam at the lower end of the step plate, so that the step plate can slide in the horizontal direction, the 'bridging effect' under the earthquake action is removed, and the adverse effect of the cast-in-place reinforced concrete stair on the earthquake resistance of the frame main body structure is weakened. The common sliding support is generally made by referring to a national building standard design atlas (16G101-2), the support is simple in structure, only the stair plates are placed on the stair girders, namely only the vertical downward freedom degree of the stair plates is restrained, and the freedom degrees in other directions are not restrained, so that the restraint redundancy of the stair structure is seriously reduced, and the risk of sliding and falling of the stair plates when a large earthquake occurs is still caused.
In order to improve the safety of the sliding support, the common rubber and other flexible sliding supports exist at present, but the defects of complex processing technology, poor durability, high manufacturing cost and the like exist. Moreover, most of the sliding supports have single functions, do not have energy consumption capacity and cannot provide additional damping for the whole structure. In order to change the current situation, energy-consuming and shock-absorbing technologies are introduced into staircase earthquake resistance, for example, chinese patent CN205296401U discloses a sliding energy-consuming support for a staircase structure, which can horizontally shift to release the bracing effect under the action of a horizontal earthquake, and can dissipate the earthquake energy to provide additional damping for the structure. However, the support is arranged between the top of the ladder beam (the cantilever plate) and the ladder plate in the support arrangement mode, the height of the support is limited in the arrangement mode, the support is vertically stressed, the energy consumption effect of the support is influenced, and great inconvenience is brought to support construction and replacement.
For the mild steel energy dissipation support, the limitation of height restricts many mechanical properties of the support to a certain extent, such as elastic rigidity, yield load, yield displacement, ultimate displacement and the like. According to the current research, the soft steel energy dissipation support has yield energy dissipation under the action of small shock, the soft steel energy dissipation support does not have self-resetting capability, the plastic deformation after yielding cannot be recovered, the whole structure is not damaged at the moment, and the soft steel energy dissipation support is in a plastic state, so that the soft steel energy dissipation support is particularly important for the soft steel energy dissipation support to be convenient to replace.
Disclosure of Invention
The invention aims to provide a replaceable staircase composite damping support and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a compound damping support in removable staircase, is provided with mild steel power consumption support including setting up sliding support between the ladder board of ladder roof beam and this ladder roof beam top and setting up the board of encorbelmenting in ladder roof beam lower part on the board of encorbelmenting, the ladder board passes through sliding support to be supported on the ladder roof beam, mild steel power consumption support with the part that the ladder board is located the board top of encorbelmenting links to each other.
Preferably, the soft steel energy consumption support comprises an upper connecting plate connected with the ladder plate, a plurality of single energy consumption core plates and a lower connecting plate connected with the cantilever plate, the single energy consumption core plates comprise more than one single energy consumption core plate, the single energy consumption core plates adopt a cross section form capable of yielding along the full length cross section, the extending direction of the full length cross section of the single energy consumption core plates in the single energy consumption core plates is parallel to the trend of the stairs, the single energy consumption core plates are closely arranged when the single energy consumption core plates are formed by the plurality of single energy consumption core plates, the upper ends and the lower ends of the single energy consumption core plates are correspondingly connected with the upper connecting plate and the lower connecting plate respectively, and the single energy consumption core plates are arranged at intervals along the direction perpendicular to.
Preferably, the upper connecting plate and the lower connecting plate are both provided with fixing grooves, and the upper end and the lower end of the single energy-consuming core plate are respectively embedded into the corresponding fixing grooves on the upper connecting plate and the lower connecting plate and are welded and fixed with the corresponding connecting plates by adopting a slit welding method. The welding mode is firm and reliable, the support can be fully guaranteed not to be damaged at the welding position, and meanwhile welding processing of the support is facilitated.
Preferably, the single-limb energy-consumption core plate is made of a low-yield-point steel material, and the upper connecting plate and the lower connecting plate are made of common steel.
Preferably, the upper connecting plate and the lower connecting plate are provided with bolt holes for installing anchor bolts, and the upper connecting plate and the lower connecting plate are respectively connected with embedded bolt sleeves arranged in the ladder plate and the cantilever plate through the anchor bolts.
Preferably, the sliding support is made of a polytetrafluoroethylene plate.
Preferably, leave the clearance (reserving the deformation zone as sliding) between terraced board and the building surface course, the building surface course is located the landing slab of being connected with the terraced roof beam, is provided with the filler in the clearance, and thickness is the same with the building surface course, prevents that upper stair concreting from falling into reserve the deformation zone.
The preparation method of the replaceable staircase composite damping support comprises the following steps:
1) fixing a sliding support on the ladder beam to enable the ladder plate above the ladder beam to be supported on the ladder beam through the sliding support; the ladder beam is cantilevered outwards for a certain distance from a certain height to form a cantilever plate positioned at the lower part of the ladder beam;
2) and respectively connecting the soft steel energy dissipation support with the cantilever plate and the part of the ladder plate above the cantilever plate through bolts.
Preferably, lay the building surface course on the landing slab be connected with the terraced roof beam, leave the clearance between building surface course and terraced slab, reserve the deformation zone as sliding.
The invention has the beneficial effects that:
the composite damping support for the staircase disclosed by the invention adopts the mild steel energy dissipation support and the sliding support at the same time, has a good energy dissipation and damping effect, can remove the diagonal bracing effect generated by the stair treads, and can provide additional damping for the staircase structure. According to the invention, the ladder beam is partially cantilevered outwards, and the soft steel energy dissipation support is arranged between the corresponding cantilever plate and the ladder plate, so that the limitation of the original support arrangement form on the height of the support is relieved to a certain extent. According to the invention, the ladder plates are placed on the ladder beams, and the sliding supports are adopted between the ladder plates to bear vertical force, so that the soft steel energy dissipation support only needs to horizontally dislocate to play an energy dissipation role without bearing vertical force, and the performance of the soft steel energy dissipation support is obviously improved through the improvement of the arrangement position of the support. In addition, the invention has simple structure, convenient design and construction and low manufacturing cost, and can realize the coexistence of safety and economy.
Furthermore, the soft steel energy dissipation support, the cantilever plate and the ladder plate are screwed into the embedded sleeve through bolts, so that the soft steel energy dissipation support can be conveniently replaced after an earthquake.
Drawings
FIG. 1 is a schematic structural view of a staircase composite damping support (mild steel-sliding composite damping support) according to the present invention;
FIG. 2 is a schematic view of the installation of the composite shock mount for a staircase according to the present invention;
FIG. 3 is a schematic structural diagram of the mild steel energy dissipation support of the present invention; wherein: (a) a front view; (b) a side view; (c) a top view; (d) a perspective view;
in the figure: 1. the energy-saving building comprises a platform plate, 2 steps, 3 cantilever plates, 4 soft steel energy-consuming supports, 41 upper connecting plates, 42 single-piece energy-consuming core plates, 43 lower connecting plates, 5 bolts, 6 steps, 7 bolt sleeves, 8 sliding supports, 9 reserved deformation areas, 10 building surface layers and 11 bolt holes.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The invention provides a soft steel-sliding composite damping support with a replaceable staircase structure, so that the anti-seismic performance of a staircase is improved. As shown in fig. 1 and 2, the soft steel-sliding composite damping support for the staircase structure comprises a soft steel energy dissipation support 4 arranged between a ladder beam cantilever plate 3 formed by extending outwards of each layer of ladder beam 2 and an upper adjacent ladder plate 6 (at the position of a second step), and a sliding support 8 arranged between the ladder beams 2 and the ladder plates 6. The space height of the arrangement position of the soft steel energy dissipation support 4 is increased by utilizing the overhanging of the lower part of the ladder beam 2, and the limitation of the height of the soft steel energy dissipation support 4 is removed to a certain extent, so that the energy dissipation capability and the fatigue performance of the soft steel energy dissipation support 4 are improved. The soft steel energy dissipation support 4 does not bear pressure vertically through the sliding support 8, and can play an energy dissipation role only through dislocation in the horizontal direction, so that the adverse effect of core plate out-of-plane buckling of the soft steel energy dissipation support 4 caused by vertical bearing pressure can be effectively avoided, and the horizontal energy dissipation performance of the support is better ensured.
The composite damping support mainly plays a role in energy consumption, and the sliding support is arranged to ensure that the composite damping support deforms and moves, so that the soft steel energy consumption support deforms and consumes energy. The sliding support 8 is made of a polytetrafluoroethylene plate with the thickness of 5-10 mm, is equal to the step width, and is placed between the ladder beam 2 and the end part (the position where the first step is located) of the ladder plate 6. Meanwhile, the soft steel energy dissipation support 4 is installed, the embedded sleeve is matched with the bolt 5, the soft steel energy dissipation support 4 can be installed and replaced at any time after being damaged under the action of an earthquake, and the soft steel energy dissipation support 4 can be repaired simply, quickly and conveniently after the earthquake. A50-60 mm gap is reserved between the sliding support 8 and the building surface layer 10, a polystyrene board is filled in the gap, the thickness of the polystyrene board is the same as that of the building surface layer, and the polystyrene board is used as a ladder board sliding reserved deformation area 9.
As shown in fig. 3, the mild steel energy dissipation support 4 includes an upper connection plate 41, a single energy dissipation core plate 42 and a lower connection plate 43, the upper end of the single energy dissipation core plate 42 is connected to the fixing groove of the upper connection plate 41 by a slit welding, the lower end of the energy dissipation core plate 42 is connected to the fixing groove of the lower connection plate 43 by a slit welding, a series of bolt holes 11 are respectively formed in the upper and lower connection plates, and the requirements of the steel structure design specification (GB50017-2003) on the bolt hole formation are met (fig. 3 c). The upper anchor bolts 5 are screwed into the bolt sleeves 7 pre-embedded in the upper step plate through corresponding bolt holes in the upper connecting plate 41, so that the upper connecting plate 41 is connected with the step plate. And the lower anchoring bolt 5 is screwed into a bolt sleeve 7 pre-embedded in the lower ladder beam cantilever plate through a corresponding bolt hole on the lower connecting plate 43, so that the lower connecting plate 43 is connected with the cantilever plate.
The single energy-consuming core plates 42 are arranged in a plurality of (for example, six in fig. 3 a) spaced in a direction perpendicular to the direction of the staircase, each single energy-consuming core plate 42 includes more than one (for example, four in fig. 3b) single energy-consuming core plates, the cross-sectional form of each single energy-consuming core plate is designed according to material mechanics (for example, parabolic), the single energy-consuming core plates can yield along the full-length cross section (the design of yielding of the full cross section of the core plate enables the material to be utilized more fully, the energy-consuming effect of the core plate is exerted more greatly, and the damping performance of the support is improved), the extending direction of the full-length cross section of each single energy-consuming core plate 42 is parallel to the direction of the staircase (fig. The single-limb energy-consuming core plate is made of a low-yield-point steel material (such as LYP100), and the upper connecting plate 41 and the lower connecting plate 43 are made of a common steel material (such as Q235).
The number of the upper anchor bolts and the lower anchor bolts is determined by calculation according to the design requirements for bolt connection in the steel structure design specification (GB50017-2003), and the length of the welding seam at the welding part of the single energy consumption core plate 42 is determined by calculation according to the design requirements for welding seam connection in the steel structure design specification (GB 50017-2003).
The arrangement method of the soft steel-sliding composite damping support with the replaceable staircase structure comprises the following steps:
1) laying a building surface layer 10 on a platform plate 1 connected with a ladder beam 2, reserving a gap of 50-60 mm between the building surface layer 10 and a ladder plate 6 (first step) as a sliding reserved deformation area, and filling a polystyrene board in the gap, wherein the thickness of the polystyrene board is the same as that of the building surface layer 10;
2) when a stair above the ladder beam 2 is poured, a bolt sleeve 7 facing the top plane of the ladder beam is embedded in the position of the ladder plate 6 corresponding to the second step; a sliding support 8 is fixed on the ladder beam 2, so that the end part (the position where the first step is located) of the ladder plate 6 is supported on the sliding support 8; the method comprises the following steps that (1) the ladder beam 2 is outwards cantilevered for a certain distance within a certain height range (for example, the ladder beam extends to the position where a second step of an upper ladder plate is located), an overhanging plate 3 located at the lower part of the ladder beam is formed, and a bolt sleeve 7 corresponding to the position of the bolt sleeve 7 is embedded when the overhanging plate 3 is poured (the thickness of the overhanging plate ensures that the embedded bolt sleeve can be completely embedded along the vertical direction, and the overhanging part is prevented from being broken with the ladder beam);
3) screwing the anchor bolt 5 on the lower connecting plate 43 of the mild steel energy-consuming support 4 into the bolt sleeve 7 pre-embedded in the cantilever plate 3 by using a torque wrench, so that the lower connecting plate 43 is fixed on the cantilever plate 3; and screwing the anchor bolt 5 on the upper connecting plate 41 of the mild steel energy consumption support 4 into the bolt sleeve 7 pre-embedded in the step 6 by using a torque wrench, so that the upper connecting plate 41 is fixed on the step 6.
The composite damping support for the staircase has good energy consumption and damping effects, can remove the diagonal bracing effect generated by the stair treads, and can provide additional damping for the structure. The invention improves the arrangement position of the stair support and solves the defect of small space of the original arrangement mode. Meanwhile, the invention is connected through the bolt, which is convenient for replacing the support after the earthquake. According to the invention, the sliding support bears vertical pressure, so that the mild steel energy dissipation support only horizontally moves to play an energy dissipation role, and does not bear vertical force, thereby obviously improving the performance of the mild steel energy dissipation support. In addition, the invention has simple structure, convenient design and construction and low manufacturing cost, and can realize the coexistence of safety and economy.
Claims (8)
1. The utility model provides a compound damping support in removable staircase which characterized in that: the energy-saving ladder comprises a sliding support (8) arranged between a ladder beam (2) and a ladder plate (6) above the ladder beam (2) and a cantilever plate (3) arranged at the lower part of the ladder beam (2), wherein a soft steel energy-consuming support (4) is arranged on the cantilever plate (3), the ladder plate (6) is supported on the ladder beam (2) through the sliding support (8), and the soft steel energy-consuming support (4) is connected with the part, above the cantilever plate (3), of the ladder plate (6);
the soft steel energy consumption support (4) comprises an upper connecting plate (41) connected with the ladder plate (6), a plurality of single energy consumption core plates (42) and a lower connecting plate (43) connected with the cantilever plate (3), the single energy consumption core plates (42) comprise more than one single energy consumption core plates, the single energy consumption core plates adopt a section form capable of yielding along the full-length section, the extending direction of the full-length section of the single energy consumption core plates in the single energy consumption core plates (42) is parallel to the trend of the stairs, the upper ends and the lower ends of the single energy consumption core plates are correspondingly connected with the upper connecting plate (41) and the lower connecting plate (43) respectively, and the single energy consumption core plates (42) are arranged at intervals along the direction vertical to the trend of the stairs.
2. The replaceable staircase composite damping mount as set forth in claim 1, wherein: the upper connecting plate (41) and the lower connecting plate (43) are respectively provided with a fixing groove, and the upper end and the lower end of the single energy consumption core plate (42) are respectively embedded into and welded and fixed in the corresponding fixing grooves on the upper connecting plate (41) and the lower connecting plate (43).
3. The replaceable staircase composite damping mount as set forth in claim 1, wherein: the single-limb energy consumption core plate is made of a low yield point steel material, and the upper connecting plate (41) and the lower connecting plate (43) are made of common steel.
4. The replaceable staircase composite damping mount as set forth in claim 1, wherein: the upper connecting plate (41) and the lower connecting plate (43) are provided with bolt holes (11) for installing anchor bolts (5), and the upper connecting plate (41) and the lower connecting plate (43) are respectively connected with embedded bolt sleeves (7) arranged in the ladder plate (6) and the cantilever plate (3) through the anchor bolts (5).
5. The replaceable staircase composite damping mount as set forth in claim 1, wherein: the sliding support (8) is made of a polytetrafluoroethylene plate.
6. The replaceable staircase composite damping mount as set forth in claim 1, wherein: leave the clearance as slip reservation deformation zone (9) between terraced board (6) and building surface course (10), building surface course (10) are located the landing slab (1) of being connected with terraced roof beam (2).
7. The preparation method of the replaceable staircase composite damping support as claimed in claim 1, characterized in that: the method comprises the following steps:
1) a sliding support (8) is fixed on the ladder beam (2), so that the ladder plate (6) above the ladder beam (2) is supported on the ladder beam (2) through the sliding support (8); the ladder beam (2) is cantilevered outwards for a certain distance from a certain height to form a cantilever plate (3) positioned at the lower part of the ladder beam (2);
2) and (3) respectively connecting the soft steel energy dissipation support (4) with the cantilever plate (3) and the part of the ladder plate (6) above the cantilever plate (3) through bolts (5).
8. The method of claim 7, wherein: a building surface layer (10) is laid on a platform plate (1) connected with a ladder beam (2), and a gap serving as a sliding reserved deformation area (9) is reserved between the building surface layer (10) and the ladder plate (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811610832.XA CN109695321B (en) | 2018-12-27 | 2018-12-27 | Replaceable staircase composite damping support and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811610832.XA CN109695321B (en) | 2018-12-27 | 2018-12-27 | Replaceable staircase composite damping support and preparation method thereof |
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| CN109695321A CN109695321A (en) | 2019-04-30 |
| CN109695321B true CN109695321B (en) | 2021-02-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11303352A (en) * | 1998-04-24 | 1999-11-02 | Sumitomo Metal Mining Co Ltd | Staircase tread |
| CN101851970A (en) * | 2010-05-14 | 2010-10-06 | 北京工业大学 | Horizontal seamed energy dissipation prestressed shear wall structure |
| CN202390930U (en) * | 2011-12-19 | 2012-08-22 | 中国建筑西北设计研究院有限公司 | Vibration-absorbing and anti-collapsing support of staircase |
| CN205296401U (en) * | 2016-01-15 | 2016-06-08 | 中国建筑西北设计研究院有限公司 | Staircase structure slip power consumption support |
-
2018
- 2018-12-27 CN CN201811610832.XA patent/CN109695321B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11303352A (en) * | 1998-04-24 | 1999-11-02 | Sumitomo Metal Mining Co Ltd | Staircase tread |
| CN101851970A (en) * | 2010-05-14 | 2010-10-06 | 北京工业大学 | Horizontal seamed energy dissipation prestressed shear wall structure |
| CN202390930U (en) * | 2011-12-19 | 2012-08-22 | 中国建筑西北设计研究院有限公司 | Vibration-absorbing and anti-collapsing support of staircase |
| CN205296401U (en) * | 2016-01-15 | 2016-06-08 | 中国建筑西北设计研究院有限公司 | Staircase structure slip power consumption support |
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