CN204401822U - A kind of built-in steel plate RPC compound shear wall - Google Patents

Abstract

The utility model provides an active powder concrete composite shear wall with a built-in steel plate, which includes a built-in steel plate, a number of rows of stiffening ribs with holes are arranged on both sides of the built-in steel plate, shaped steel is arranged at both ends of the built-in steel plate, built-in steel plates, stiffeners with holes Ribs and steel profiles are wrapped in reactive powdered concrete. The combined shear wall of the utility model can give full play to the respective mechanical properties of the built-in steel plate and the active powder concrete. The active powder concrete can be used not only as an ideal load-bearing and anti-seismic material for the wall, but also as a lateral support for the built-in steel plate. Built-in steel plate for restraint and protection. The stiffeners with holes set on the built-in steel plate can enhance the coupling effect between the reactive powder concrete and the built-in steel plate, and prevent the two-way separation between the built-in steel plate and the reactive powder concrete. The shear wall of the utility model obtains better bearing capacity, ductility and energy dissipation performance under the action of strong earthquakes, has strong earthquake resistance, and is suitable for shear walls of high-rise and super high-rise buildings.

Description

An active powder concrete composite shear wall with built-in steel plate

technical field

The utility model belongs to the field of anti-seismic technology of steel and concrete combined structure and mixed structure, in particular to an active powder concrete combined shear wall with built-in steel plates.

Background technique

Shear walls are the most important lateral force-resisting structural components of high-rise and super-high-rise buildings. It is very important to develop shear wall systems with good seismic performance. The steel-concrete composite shear wall makes full use of the respective advantages of steel and concrete materials, develops strengths and circumvents weaknesses. It is a low-cost, high-efficiency structural combination form, and it is also a new type of structural system with broad development prospects in my country.

The use of high-strength materials in engineering structures can not only meet the needs of modern engineering structures for high-rise and large-span development, reduce the cross-sectional size of structural members, and save material consumption; it can also improve the durability of concrete structures and prolong the service life of structures. economic and social benefits. However, after the compressive strength of concrete is increased, its tensile and shear strength are relatively low, and the ductility is reduced, thus reducing the seismic performance of concrete structures.

For the existing ordinary concrete composite shear walls with built-in steel plates, due to the high strength requirements of ordinary concrete, its ductility and crack resistance are relatively weak. In the case of large deformation, the concrete slab may crack and peel off. The effect is greatly weakened, which greatly reduces the ductility and energy dissipation capacity of the composite shear wall under the action of a large earthquake, and the exposure of cracks is inevitable, affecting normal use and durability.

Utility model content

The purpose of the utility model is to provide an active powder concrete composite shear wall with built-in steel plates, which can overcome the shortcomings of the existing ordinary concrete composite shear walls with built-in steel plates, and has the advantages of good seismic performance, fire prevention and durability.

In order to achieve the above object, the utility model adopts the following technical solutions:

An active powder concrete composite shear wall with built-in steel plates, including built-in steel plates, several columns of stiffeners with holes are arranged on both sides of the built-in steel plates, shaped steel is arranged at both ends of the built-in steel plates, and the built-in steel plates, stiffeners with holes and shaped steel are wrapped in in reactive powder concrete.

A number of through holes are opened on the stiffener with holes.

The stiffeners with holes are arranged along the full height of the built-in steel plate.

The section steel is arranged along the full height of the built-in steel plate.

The section steel is an I-shaped section steel.

The steel content of its section is 0.04 to 0.2.

The built-in steel plate is a single-layer steel plate.

Compared with the prior art, the beneficial effects of the utility model are:

The active powder concrete composite shear wall with built-in steel plates provided by the utility model forms a built-in steel plate composite structure with end columns because the section steel and the surrounding active powder concrete form end columns. In the utility model, the active powder concrete with high strength and good ductility can be used not only as an ideal load-bearing and anti-seismic material for the wall, but also as a lateral support for the built-in steel plate, which plays a good role in restraining the built-in steel plate and can prevent Local buckling of the built-in steel plate occurs prematurely, and the active powder concrete plays a protective role for the built-in steel plate, and takes into account the functions of fire prevention and corrosion resistance. The stiffeners with holes set on the built-in steel plate can enhance the coupling effect between the reactive powder concrete and the built-in steel plate, transmit the shear force and coordinate the extrusion buckling deformation between the built-in steel plate and the reactive powder concrete, and prevent the gap between the built-in steel plate and the reactive powder concrete. There is a two-way separation problem. Setting stiffeners with holes on the built-in steel plate can further improve the overall ductility and energy dissipation capacity of the wall, so as to meet the ductility and seismic bearing capacity requirements under large earthquakes. In the combined shear wall provided by the utility model, the stiffening rib with holes is used to replace the traditional studs to enhance the coupling and synergistic effect between the concrete and the steel plate, which can effectively improve the ductility of the combined shear wall system during the stress process. Compared with studs, the processing quality of stiffeners with holes is easier to control and easy to operate, and the stiffeners with holes are more conducive to the passage of pipelines inside the wall. The end column of the utility model can bear more axial force and effectively reduce the axial compression ratio of the shear wall. In the late stage of strong earthquake, when the performance of the shear wall declines, the end column can effectively avoid When the wall collapses, the end column and the shear wall form a whole to jointly bear the shear force and the bending moment, so that the combined shear wall of the utility model can obtain better bearing capacity and deformation performance. Reactive powder concrete has ultra-high bearing capacity, and its ductility and crack resistance are very superior. It can meet the requirements of high strength and high durability at the same time, and can overcome the shortcomings of the existing steel plate ordinary concrete composite shear wall. In the case of the same bearing capacity, the active powder concrete composite shear wall with built-in steel plates provided by the utility model has greater shear rigidity, and has a smaller thickness and lighter weight, which not only improves the space utilization rate of high-rise buildings , and the size of the foundation is reduced, and the seismic action suffered is correspondingly reduced. In summary, the composite shear wall provided by the utility model has high bearing capacity, good ductility and energy dissipation capacity, strong earthquake resistance, and has the advantages of fire resistance and durability, high cost performance, and practical promotion value.

Description of drawings

Fig. 1 is the cross-sectional schematic view of the combined shear wall provided by the utility model;

Fig. 2 is the structural representation of the stiffener with holes in the composite shear wall provided by the utility model;

Fig. 3 is the three-dimensional schematic diagram of the composite shear wall provided by the utility model;

Among them: 1 is the built-in steel plate, 2 is the stiffener with holes, 3 is the active powder concrete, and 4 is the section steel.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to Fig. 1 to Fig. 3, the active powder concrete composite shear wall with built-in steel plate provided by the utility model includes a built-in steel plate 1, which is a single-layer steel plate, and several rows of stiffening ribs 2 with holes are arranged on both sides of the built-in steel plate 1 The stiffeners with holes 2 are evenly opened with a number of oval through holes, the two ends of the built-in steel plate 1 are welded with I-shaped steel, the built-in steel plate 1, the stiffeners with holes 2 and the shaped steel 4 are wrapped in reactive powder concrete 3, and the built-in steel plate 1 is tightly connected with reactive powder concrete 3 through stiffeners 2 with holes. The stiffeners 2 with holes and the section steel 4 are arranged along the full height of the built-in steel plate 1 . The shaped steel 4 and the surrounding active powder concrete 3 constitute the end column. The section steel ratio of the active powder concrete composite shear wall with built-in steel plate is 0.04-0.2.

The perforated stiffener 2 and section steel 4 in the built-in steel plate active powder concrete composite shear wall provided by the utility model can be welded on the built-in steel plate 1 at the construction site, and then installed at the designated position, and the active powder concrete can be carried out after the formwork is set up. 3, that is, the built-in steel plate active powder concrete composite shear wall provided by the utility model has been built at the designated position.

Reactive powder concrete is a new super-high-strength concrete with ultra-high strength, low brittleness, excellent durability and broad application prospects, which was successfully researched by Bouygues Company in France at the end of the 20th century after high-strength and high-performance concrete soil. The composite shear wall with built-in steel plate active powder concrete provided by the utility model can give full play to the respective advantages of the steel plate and the active powder concrete, and maximize the advantages and avoid the disadvantages. The mechanical properties of reactive powder concrete with high strength and good ductility can be used not only as an ideal load-bearing and earthquake-resistant material for walls, but also as a lateral support for built-in steel plates. The built-in steel plates are embedded in reactive powder concrete and are constrained by reactive powder concrete. Inhibit the two-way buckling of the built-in steel plate, and the active powder concrete can protect the built-in steel plate, and take into account the functions of fire prevention and corrosion resistance. Compared with ordinary concrete, reactive powder concrete not only greatly improves the compressive and flexural capacity of ordinary concrete, but also enhances the toughness and ductility of ordinary concrete, thereby further improving the seismic performance of composite shear wall structures. Therefore, the active powder concrete composite shear wall with built-in steel plates provided by the utility model is a low-cost, high-efficiency structural combination form, and it is also a new structural system with broad development prospects in my country.

In addition, the composite shear wall provided by the utility model enables high-performance active powder concrete to be popularized and applied in high-rise, super high-rise buildings and buildings in areas with high seismic intensity, especially high-rise buildings and super-high-rise buildings in areas with seismic fortification intensity above 8 degrees. high-rise buildings.

Claims (7)

1. An active powder concrete composite shear wall with a built-in steel plate, is characterized in that: comprise a built-in steel plate (1), the two sides of the built-in steel plate (1) are provided with some rows of stiffeners with holes (2), the built-in steel plate (1) Shaped steel (4) is arranged at both ends of the structure, and the built-in steel plate (1), the stiffener with holes (2) and the shaped steel (4) are wrapped in active powder concrete (3). 2. The reactive powder concrete composite shear wall with built-in steel plate according to claim 1, characterized in that: the stiffener with holes (2) is provided with several through holes. 3. The active powder concrete composite shear wall with built-in steel plates according to claim 1, characterized in that: the stiffeners (2) with holes are arranged along the full height of the built-in steel plates (1). 4. The active powder concrete composite shear wall with built-in steel plate according to claim 1, characterized in that: the section steel (4) is arranged along the full height of the built-in steel plate (1). 5. The active powder concrete composite shear wall with built-in steel plate according to claim 1, characterized in that: the section steel (4) is an I-shaped section steel. 6. The reactive powder concrete composite shear wall with built-in steel plate according to claim 1, characterized in that: the steel content of its section is 0.04-0.2. 7. The active powder concrete composite shear wall with built-in steel plate according to claim 1, characterized in that: the built-in steel plate (1) is a single-layer steel plate.