阅读说明：本技术 一种用于楼梯结构的预制整体式隔震支座及施工方法 (Prefabricated integral type shock insulation support for stair structure and construction method ) 是由 辛力 史生志 杨琦 曾凡生 于 2020-08-17 设计创作，主要内容包括：本发明涉及一种用于楼梯结构的预制整体式隔震支座及施工方法,包括支座基体以及置于支座基体内的柔性变形体和连接组件,柔性变形体包括隔震橡胶以及设置在隔震橡胶周围的预留变形区；柔性变形体的结构为L形体；连接组件一端置于支座基体内与隔震橡胶相连,并与柔性变形体和支座基体预制成一体；连接组件另一端置于支座基体外部；柔性变形体还包括分别设置在隔震橡胶上表面处和下表面处的钢板,所述连接组件通过钢板与隔震橡胶相连。本发明施工节点连接简单、装配率高、隔震支座与楼梯形成混凝土和钢筋相结合的框架结构,稳定性好、抗震设防烈度能达到6-8度,隔震级别高。(The invention relates to a prefabricated integral shock insulation support for a stair structure and a construction method, wherein the prefabricated integral shock insulation support comprises a support base body, and a flexible deformation body and a connecting assembly which are arranged in the support base body, wherein the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; the flexible deformation body is in an L-shaped structure; one end of the connecting component is arranged in the support base body and connected with the shock insulation rubber, and the connecting component, the flexible deformation body and the support base body are prefabricated into a whole; the other end of the connecting component is arranged outside the support base body; the flexible deformation body further comprises steel plates respectively arranged on the upper surface and the lower surface of the shock insulation rubber, and the connecting assembly is connected with the shock insulation rubber through the steel plates. The construction joint is simple in connection and high in assembly rate, the shock insulation support and the stair form a concrete and steel bar combined frame structure, the stability is good, the seismic fortification intensity can reach 6-8 degrees, and the shock insulation level is high.)

1. The utility model provides a prefabricated integral shock insulation support for stair structure which characterized in that: the prefabricated integral shock insulation support for the stair structure comprises a support base body, and a flexible deformation body (1) and a connecting assembly which are arranged in the support base body; the flexible deformation body (1) comprises shock insulation rubber (2) and a reserved deformation area arranged around the shock insulation rubber (2); the flexible deformation body (1) is in an L-shaped structure; one end of the connecting component is arranged in the support base body and connected with the shock insulation rubber (2), and the connecting component, the flexible deformation body (1) and the support base body are prefabricated into a whole; the other end of the connecting component is arranged outside the support base body.

2. The prefabricated integrated seismic isolation bearing for a stair structure according to claim 1, wherein: the flexible deformation body (1) further comprises steel plates (3) respectively arranged on the upper surface and the lower surface of the shock insulation rubber (2), and the connecting assembly is connected with the shock insulation rubber (2) through the steel plates (3).

3. The prefabricated integrated seismic isolation bearing for a stair structure according to claim 2, wherein: the connecting assembly comprises a fastener (4) and a support connecting steel bar; one end of the support connecting steel bar is arranged in the support base body, is connected with the steel plate (3) through a fastener (4) and is prefabricated into a whole with the support base body; the other end of the support connecting steel bar is arranged outside the support base body.

4. The prefabricated integrated seismic isolation bearing for a stair structure according to claim 3, wherein: the support connecting steel bars comprise ladder beam section connecting steel bars (6) and step section connecting steel bars (5); one end of the ladder beam section connecting steel bar (6) is connected with the steel plate (3) on the lower surface of the shock insulation rubber (2) through a fastener (4), and the other end of the ladder beam section connecting steel bar (6) extends out of the support base body; one end of the step section connecting steel bar (5) is connected with a steel plate (3) on the upper surface of the shock insulation rubber (2) through a fastener (4); the other end of the step section connecting steel bar (5) extends out of the support base body.

5. The prefabricated integrated seismic isolation bearing for a stair structure according to claim 4, wherein: the fastening piece (4) is a bolt or an anchor bar.

6. The prefabricated integrated seismic isolation bearing for a stair structure according to claim 5, wherein: the diameter of the fastening piece (4) is more than or equal to 8mm, and the height of the fastening piece (4) is more than or equal to 80 mm.

7. A construction method of a prefabricated integrated seismic isolation bearing for a stair structure based on any one of claims 1-6 is characterized in that: the construction method comprises the following steps:

1) placing the prefabricated integrated shock-insulation support saddle of claim 1 between a lower stair beam (9) and an upper stair tread (8), wherein the connecting assembly is respectively connected with the lowest-end step plate of the lower stair beam (9) and the upper stair tread (8);

2) concrete is poured around the tread plate at the lowest end of the upper stair tread (8), the prefabricated integral shock insulation support and the lower stair beam (9);

3) the construction is accomplished in the concrete curing shaping, and integral shock insulation support forms the frame construction that concrete and reinforcing bar combined together with lower part stair step roof beam (9) and upper portion stair footboard (8) respectively, and shock insulation rubber (2) play the stabilizing action with reserving the deformation zone to the stair.

8. The construction method of the prefabricated integrated seismic isolation bearing for the stair structure according to claim 7, wherein the construction method comprises the following steps: the concrete realization process of the step 1) is that the ladder beam section connecting steel bar (6) extending out of the support base body is arranged in the lower stair beam (9); the tread section connecting steel bars (5) extending out of the support base body are arranged in the tread plate at the lowest end of the upper stair tread (8).

9. The construction method of the prefabricated integral seismic isolation bearing for the stair structure according to claim 8, wherein the construction method comprises the following steps: the tread section connecting steel bars (5) extending out of the support base body are obliquely arranged, and the oblique angle is equal to that of the upper stair treads (8); the ladder beam section extending out of the support base body is connected with a steel bar (6), and the horizontal length of the ladder beam section is 300-600 mm.

10. The construction method of the prefabricated integrated seismic isolation bearing for the stair structure according to claim 7, wherein the construction method comprises the following steps: in the step 3), the rubber shear modulus G of the shock insulation rubber (2) is not less than 0.4MPa and not more than 0.6MPa, the ultimate tensile stress of the rubber is not less than 1.5MPa, and the ultimate compressive stress of the rubber is not less than 90 MPa; the reserved deformation area is filled with flexible deformation materials; the ultimate compressive strength of the flexible deformation material is less than 0.2MPa, and the uniaxial ultimate compressive strain of the flexible deformation material is not less than 80%.

Technical Field

The invention belongs to the technical field of building construction, relates to a shock insulation support, and particularly relates to a prefabricated integral shock insulation support for a stair structure and a construction method.

Background

In the structure of the plate type stair, the stair increases the space rigidity of the whole structure, in the design of the traditional frame structure stair, the stair plates of the plate type stair are generally designed only according to one-way bending components, but the middle plates are used as oblique supporting components to bear axial force and shearing force under the action of earthquake, so that the stress of the joints of the stair plates and the stair beams is large. Generally, a support is required to be arranged between the upper-layer ladder plate and the lower-layer ladder beam for releasing the shearing force and the bending moment, reducing the stress of the ladder plate and playing a role in resisting earthquake. Currently, the current practice is. The mounting mode of the stair earthquake-resistant support is usually an assembly type structure which mainly comprises concrete and a steel structure, the assembly type concrete structure is the key point of the industrial development of buildings, but the technical level of the structure has the defects of limited building types, low assembly rate, complex node connection and poor earthquake-resistant performance; the steel structure is processed in factories, installed on site, has higher industrialization degree and high construction and maintenance cost. Therefore, a new stair seismic isolation method is required.

Disclosure of Invention

Aiming at the technical problems of the conventional stair shock insulation support, the invention provides the prefabricated integral shock insulation support for the stair structure and the construction method, the connection of nodes in the construction process is simple, the assembly rate is high, the stability is good, the shock insulation support and the stair form a frame structure combining concrete and reinforcing steel bars, the shock insulation fortification intensity can reach 6-8 degrees, and the shock insulation level is high.

In order to achieve the purpose, the invention adopts the technical scheme that:

a prefabricated integral shock insulation support for a stair structure comprises a support base body, a flexible deformation body and a connecting assembly, wherein the flexible deformation body and the connecting assembly are arranged in the support base body; the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; the flexible deformation body is in an L-shaped structure; one end of the connecting component is arranged in the support base body and connected with the shock insulation rubber, and the connecting component, the flexible deformation body and the support base body are prefabricated into a whole; the other end of the connecting component is arranged outside the support base body.

Further, the flexible deformation body further comprises steel plates respectively arranged on the upper surface and the lower surface of the shock insulation rubber, and the connecting assembly is connected with the shock insulation rubber through the steel plates.

Further, the connecting assembly comprises a fastener and a support connecting steel bar; one end of the support connecting steel bar is arranged in the support base body, is connected with the steel plate through a fastener and is prefabricated with the support base body into a whole; the other end of the support connecting steel bar is arranged outside the support base body.

Furthermore, the support connecting steel bars comprise ladder beam section connecting steel bars and step section connecting steel bars; one end of the ladder beam section connecting steel bar is connected with the steel plate on the lower surface of the shock insulation rubber through a fastener, and the other end of the ladder beam section connecting steel bar extends out of the support base body; one end of the stepping section connecting steel bar is connected with a steel plate on the upper surface of the shock insulation rubber through a fastener; the other end of the stepping section connecting steel bar extends out of the support base body.

Further, the fastener is a bolt or an anchor bar.

Furthermore, the diameter of the fastening piece is more than or equal to 8mm, and the height of the fastening piece is more than or equal to 80 mm.

A construction method of a prefabricated integral shock insulation support for a stair structure comprises the following steps:

1) the prefabricated integrated shock insulation support is arranged between the lower stair beam and the upper stair tread, and the connecting assembly is respectively connected with the lower stair beam and the tread plate at the lowest end of the upper stair tread;

2) concrete is poured around the step plate at the lowest end of the upper stair tread, the prefabricated integral shock insulation support and the lower stair beam;

3) the construction is accomplished in the concrete curing shaping, and integral shock insulation support forms the frame construction that concrete and reinforcing bar combined together with lower part stair step roof beam and upper portion stair footboard respectively, and shock insulation rubber plays the stabilizing action to the stair with reserving the deformation zone.

Further, the concrete realization process of the step 1) is that the ladder beam section connecting steel bar extending out of the support base body is arranged in the ladder beam of the lower stair; the connecting steel bars of the tread sections extending out of the base body of the support are arranged in the tread plate at the lowest end of the upper stair tread.

Furthermore, the connecting steel bars of the tread sections extending out of the support base body are obliquely arranged, and the oblique angle is equal to that of the upper stair treads; the ladder beam section extending out of the support base body is connected with a steel bar (6), and the horizontal length of the ladder beam section is 300-600 mm.

Further, in the step 3), the rubber shear modulus G of the shock insulation rubber is not less than 0.4MPa and not more than 0.6MPa, the ultimate tensile stress of the rubber is not less than 1.5MPa, and the ultimate compressive stress of the rubber is not less than 90 MPa; the reserved deformation area is filled with flexible deformation materials; the ultimate compressive strength of the flexible deformation material is less than 0.2MPa, and the uniaxial ultimate compressive strain of the flexible deformation material is not less than 80%.

The invention has the beneficial effects that:

1. the invention discloses a prefabricated integral type shock insulation support for a stair structure, which comprises a support base body, and a flexible deformation body and a connecting assembly which are arranged in the support base body, wherein the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; the flexible deformation body is in an L-shaped structure; one end of the connecting component is arranged in the support base body and connected with the shock insulation rubber, and the connecting component, the flexible deformation body and the support base body are prefabricated into a whole; the other end of the connecting component is arranged outside the support base body. The support base body and arrange the flexible deformation body and the coupling assembling in the support base body in through the concrete prefabrication, form integral shock insulation support, rethread connecting piece is connected fixedly with stair step roof beam and stair step board, and during the construction, the nodal connection is simple, and the installation assembly is convenient, efficient.

2. The prefabricated integrated shock insulation support is arranged between the lower stair beam and the upper stair tread, and the connecting assembly is respectively connected with the lowest-end step plate of the lower stair beam and the lowest-end step plate of the upper stair tread; the ladder beam section connecting steel bar extending out of the support base body is arranged in the lower stair beam; the connecting steel bars of the step sections extending out of the base body of the support are arranged in the step plates at the lowest ends of the stair treads at the upper part, then the concrete is poured, the lower stair step beams, the integral shock insulation support and the stair treads at the upper part form a frame structure combining the concrete and the steel bars, and the shock resistance is high.

3. According to the invention, the flexible deformation body is an L-shaped body, the rubber shear modulus G of the shock insulation rubber is not less than 0.4MPa and not more than 0.6MPa, the ultimate tensile stress of the rubber is not less than 1.5MPa, and the ultimate compressive stress of the rubber is not less than 90 MPa. After the flexible deformation body and the support base body are prefabricated into the integral shock insulation support, when the seismic fortification intensity reaches 6-8 degrees, the integral shock insulation support has good shock resistance and high shock insulation level, and the safety of stairs is ensured.

4. According to the invention, the flexible deformation body comprises shock insulation rubber and a reserved deformation area arranged around the shock insulation rubber; and the reserved deformation area is filled with a flexible deformation material, the ultimate compressive strength of the flexible deformation material is less than 0.2MPa, the uniaxial ultimate compressive strain of the flexible deformation material is not less than 80%, the horizontal dislocation between the ladder plate and the ladder beam is ensured without being influenced by a building surface layer, and the stability is better.

Drawings

FIG. 1 is a schematic view of a seismic isolation mount according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the seismic isolation mount of example 1 in a staircase installation;

FIG. 3 is a schematic front view of the seismic isolation bearing of embodiment 1 installed in a staircase;

FIG. 4 is a schematic top view of the seismic isolation bearing of example 1 installed in a staircase;

FIG. 5 is a schematic view of a seismic isolation mount according to embodiment 2 of the present invention;

FIG. 6 is a schematic view of the seismic isolation mount of example 2 in a staircase installation;

wherein:

1-a flexible deformable body; 2-shock insulation rubber; 3-a steel plate; 4-a fastener; 5, connecting the stepping section with a steel bar; 6, connecting reinforcing steel bars with the ladder beam section; 7, constructing a steel bar; 8-upper stair treads; 9-lower stair beam.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings and examples.