阅读说明：本技术 一种混凝土抗震板式楼梯 (Concrete antidetonation board-like stair ) 是由 吕康 向贤镜 严成斌 王明 杨曼 石文杰 陈琰 袁强 文浩 杨盛 熊雨扬 王杰 于 2019-10-10 设计创作，主要内容包括：本发明提供了一种混凝土抗震板式楼梯,包括梯板；所述梯板的上端固定至休息平台楼板,梯板的下端底面设置滑动支座,在梯板的上端部有T形梯梁设置于休息平台楼板底面；梯板下端底面的滑动支座正对T形梯梁上方位置。本发明在有效避免梯板对楼层平面的刚度分布、扭转效应的不利影响的同时,使得主体结构受力简单明确,且提高了主体结构竖向紧急逃生通道的可靠性,具有更高的安全性及工程可行性。(The invention provides a concrete earthquake-resistant plate type stair which comprises a stair plate; the upper end of the ladder plate is fixed to the floor of the rest platform, the bottom surface of the lower end of the ladder plate is provided with a sliding support, and the upper end of the ladder plate is provided with a T-shaped ladder beam arranged on the bottom surface of the floor of the rest platform; the sliding support on the bottom surface of the lower end of the ladder plate is over against the upper position of the T-shaped ladder beam. The invention effectively avoids the adverse effects of the rigidity distribution and the torsion effect of the stair treads on the floor plane, simultaneously ensures that the main structure is simple and clear in stress, improves the reliability of the vertical emergency escape passage of the main structure, and has higher safety and engineering feasibility.)

1. The utility model provides a concrete antidetonation plate stair, includes step (1), its characterized in that: the upper end of the ladder plate (1) is fixed to a rest platform floor (8), the bottom surface of the lower end of the ladder plate (1) is provided with a sliding support (4), and a T-shaped ladder beam (3) is arranged at the upper end of the ladder plate (1) and is arranged on the bottom surface of the rest platform floor (8); the sliding support (4) on the bottom surface of the lower end of the ladder plate (1) is over against the upper position of the T-shaped ladder beam (3).

2. A concrete earthquake-resistant slab stair as claimed in claim 1, wherein: the interior of the stair tread (1) is provided with longitudinal stress steel bars (14) of the stair tread and fixed along the slope surface formed by the stair treads (13).

3. A concrete earthquake-resistant slab stair as claimed in claim 2, wherein: the ladder board (1) is also fixed with additional longitudinal steel bars (15) at the edges of the ladder board, and the additional longitudinal steel bars (15) at the edges of the ladder board are parallel to a slope surface formed by longitudinal stress steel bars (14) of the ladder board and stair steps (13).

4. A concrete earthquake-resistant slab stair as claimed in claim 1, wherein: the stair board horizontal distribution ribs (16) are further fixed in the stair board (1), and the stair board horizontal distribution ribs (16) are perpendicular to longitudinal stress steel bars (14) of the stair board and parallel to a slope surface formed by the stair steps (13).

5. A concrete earthquake-resistant slab stair as claimed in claim 1, wherein: the sliding support (4) is of a three-layer structure and is composed of an upper embedded steel plate (5), a polytetrafluoroethylene film (7) and a lower embedded steel plate (6) from top to bottom.

6. A concrete earthquake-resistant slab stair as claimed in claim 1, wherein: the lower end side edge of the ladder board (1) is fixed with a polymer foam filling agent (10), and the height of the polymer foam filling agent (10) is equal to that of a rest platform floor surface layer (9) of a rest platform floor (8).

7. A concrete earthquake-resistant slab stair as claimed in claim 6, wherein: and a polyethylene polypropylene composite waterproof coiled material (11) is fixed at the position, which is positioned on the upper edge of the polymer foam filling agent (10), on the lower end side edge of the ladder board (1).

8. A concrete earthquake-resistant slab stair as claimed in claim 1, wherein: the width of the sliding support (4) is equal to twice the width of each stair step (13).

9. A concrete earthquake-resistant slab stair as claimed in claim 1, wherein: the rest platform floor (8) is provided with a recess at the position opposite to the sliding support (4), the depth of the recess is equal to the height of the rest platform floor surface (9) of the rest platform floor (8), and the recess is matched with the sliding support (4).

Technical Field

The invention relates to a concrete anti-seismic plate type stair, and belongs to the technical field of water conservancy and hydropower engineering anti-seismic.

Background

At present, the upper end and the lower end of most reinforced concrete slab staircases are fixedly connected with ladder beams or rest platforms respectively, and when no earthquake force acts, the staircases can meet the requirements of normal use. When earthquake occurs, the stair member and the stepping inclined plate are taken as oblique members to participate in lateral force resisting work, so that the rigidity distribution in a floor plane is uneven, the torsion effect of a main body structure is increased, and the whole analysis result of the structure is greatly changed; and the main structure is damaged, so that the stair cannot be normally used.

Disclosure of Invention

In order to solve the technical problems, the invention provides a concrete anti-seismic plate type stair which can solve the problems that the two ends of a stair plate are integrally connected with a main body structure to generate adverse effects of uneven rigidity distribution, increased torsion effect and the like, when the main body structure is damaged, the stair cannot be normally used, the smoothness of a vertical escape channel is hindered and the like.

The invention is realized by the following technical scheme.

The invention provides a concrete anti-seismic plate type stair which comprises a stair plate; the upper end of the ladder plate is fixed to the floor of the rest platform, the bottom surface of the lower end of the ladder plate is provided with a sliding support, and the upper end of the ladder plate is provided with a T-shaped ladder beam arranged on the bottom surface of the floor of the rest platform; the sliding support on the bottom surface of the lower end of the ladder plate is over against the upper position of the T-shaped ladder beam.

The ladder plate is internally provided with a ladder plate longitudinal stress reinforcing steel bar which is fixed along the slope surface formed by the stair steps.

The ladder board is also fixed with additional longitudinal steel bars at the edge of the ladder board, and the additional longitudinal steel bars at the edge of the ladder board are parallel to the slope surface formed by the longitudinal stress steel bars of the ladder board and the stair steps.

The ladder board horizontal distribution ribs are further fixed in the ladder boards, are perpendicular to the longitudinal stress reinforcing steel bars of the ladder boards and are parallel to the slope surface formed by the stair steps.

The sliding support is of a three-layer structure and is composed of an upper embedded steel plate, a polytetrafluoroethylene film and a lower embedded steel plate from top to bottom.

The lower extreme side of stair board is along being fixed with polymer foam filler, and polymer foam filler height is equal in the rest platform floor slab height of rest platform floor slab.

And a polyethylene polypropylene composite waterproof coiled material is fixed at the position, which is positioned on the upper edge of the polymer foam filling agent, on the lower end side edge of the ladder board.

The width of the sliding support is equal to twice the width of each stair step.

The rest platform floor is provided with a recess at the position opposite to the sliding support, the depth of the recess is equal to the height of the rest platform floor, and the shape of the recess is matched with that of the sliding support.

The invention has the beneficial effects that: the floor structure has the advantages that the adverse effects of the rigidity distribution and the torsion effect of the floor plane caused by the step plates are effectively avoided, the stress of the main structure is simple and clear, the reliability of the vertical emergency escape passage of the main structure is improved, and the floor structure has higher safety and engineering feasibility.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the T-shaped ladder of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the shoe of FIG. 1;

fig. 4 is a schematic view illustrating an installation structure of reinforcing bars inside the step plate of fig. 1;

FIG. 5 is a schematic top view of FIG. 4;

fig. 6 is a partially enlarged schematic view of fig. 3.

In the figure: the method comprises the following steps of 1-step plate, 3-T-shaped step beam, 4-sliding support, 5-upper embedded steel plate, 6-lower embedded steel plate, 7-polytetrafluoroethylene film, 8-rest platform floor, 9-rest platform floor surface layer, 10-high polymer foam filler, 11-polyethylene polypropylene fiber composite waterproof coiled material, 12-T-shaped step beam flange, 13-stair step, 14-step plate longitudinal stress steel bar, 15-step plate edge additional longitudinal steel bar, 16-step plate horizontal distribution steel bar and 17-embedded steel plate anchor bar.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

A concrete earthquake-resistant slab stair as shown in fig. 1 to 6 comprises a slab 1; the upper end of the step plate 1 is fixed to a rest platform floor slab 8, the bottom surface of the lower end of the step plate 1 is provided with a sliding support 4, and the upper end part of the step plate 1 is provided with a T-shaped step beam 3 arranged on the bottom surface of the rest platform floor slab 8; the sliding support 4 on the bottom surface of the lower end of the ladder plate 1 is over against the T-shaped ladder beam 3.

The sliding support 4 is of a three-layer structure and is composed of an upper embedded steel plate 5, a polytetrafluoroethylene film 7 and a lower embedded steel plate 6 from top to bottom, and the polytetrafluoroethylene film 7 needs to be laid with good sliding performance.

The lower extreme side of step 1 is along being fixed with polymer foam filler 10, and polymer foam filler 10 is higher than the rest platform floor surface course 9 height of rest platform floor 8 and is the same.

An arc-shaped polyethylene polypropylene composite waterproof coiled material 11 is fixed at the position of the lower end side edge of the ladder board 1, which is positioned at the upper edge of the polymer foam filling agent 10.

The rest platform floor 8 is provided with a recess at the position opposite to the sliding support 4, the depth of the recess is equal to the height of the rest platform floor surface 9 of the rest platform floor 8, and the shape of the recess is matched with that of the sliding support 4.

The width of the sliding support 4 is equal to twice the width of each stair step 13. In essence, the half space floor 8 just below the sliding support 4 can be regarded as the T-shaped flange 12 of the T-shaped ladder beam 3, the width of the sliding support 4 is equal to the width of the T-shaped flange 12, and the width of the T-shaped flange 12 is equal to twice the width of each stair step 13, so as to ensure that the whole stress condition is good.

The reinforcing bar structure considering the cantilever effect comprises an anchoring measure that the longitudinal stress steel bar 14 of the ladder board 1 is positioned on the T-shaped ladder beam 3, an additional longitudinal steel bar 15 at the edge of the ladder board and a reinforcing arrangement of the horizontal distribution steel bar 16 of the ladder board close to the T-shaped ladder beam.

Generally speaking, the upper embedded steel plate 5 and the lower embedded steel plate 6 at the sliding support 4 are both provided with embedded steel plate anchor bars 17, and the specification of the embedded steel plate anchor bars 17 is generally phi 10@ 200.

Therefore, the sliding support is arranged at the contact position of the lower end of the ladder board and the ladder beam, so that the ladder board is not integrally connected with the main structure, the influence of the rigidity of the ladder board on the floor plane of the structure, which is caused by uneven rigidity distribution, is effectively avoided, and the torsion effect of the main structure is reduced. The upper and lower embedded steel plates arranged at the sliding support and the polytetrafluoroethylene films with good sliding performance in the middle of the steel plates enable the ladder plate to effectively slide under the action of earthquake force. The sliding area is arranged on one side, close to the floor, of the sliding support, and the polymer foam filling agent with good compression performance is filled in the sliding area, so that the ladder board has a free sliding distance. The ladder beam sets up to T shape cross-section, is on the basis of traditional rectangular cross section ladder beam with the thickness of rest platform floor slab as the edge of a wing height consideration, the effective width of multiplicable glide plane when the ladder board low side, when taking place the horizontal slip, still there is sufficient support width to guarantee the structure atress. The anchoring measure of the reinforcing steel bar stressed longitudinally on the ladder board can be enhanced at the high end of the ladder board. When the step structure receives vertical earthquake effort, the step produces vertical displacement, and the low side of step probably comes to nothing, sets up the tectonic measure of considering the cantilever effect in T shape ladder beam department, can avoid the structure to appear destroying.