Shear wall structure configured with crossed slant internal prestress and construction method of shear wall structure

Abstract

The invention relates to a shear wall structure configured with crossed slant internal prestress. The shear wall structure comprises a shear wall body, horizontal steel bars of the shear wall body and vertical steel bars of the shear wall body, wherein a shear wall tooth plate and a prestress tension end anchor tool are respectively arranged at the left upper corner and the right upper corner of the shear wall body, prestress anchoring end anchor tools are respectively arranged at the left lower corner and the right lower corner of the shear wall body, and a crossed slant prestress steel beam and a crossed slant prestress pipeline are arranged between the prestress anchoring end anchor tool and the prestress tension end anchor tool at the opposite corners. A construction method of the structure comprises steps of shear wall template erection and binding of ordinary steel beams of the wall body; crossed slant prestress pipeline arrangement and installation; prestress steel beam penetration and prestress anchor tool installation; shear wall concrete casting and maintenance; and prestress tension, pipeline grouting and end part anchor sealing. The shear wall structure greatly improves the anti-seismic performance of the shear wall.

Description

technical field [0001] The invention relates to a shear wall structure configured with intersecting oblique internal prestress and a construction method thereof. Background technique [0002] Shear wall is an important component that bears vertical and horizontal loads in the concrete structure of high-rise buildings. Its stress state and mechanical properties directly determine the bearing capacity and structural safety of high-rise buildings. Under the combined action of vertical loads such as the self-weight of the structure and floor live loads, and horizontal loads such as horizontal earthquakes and wind loads, the shear wall will generate principal tensile stress along the diagonal direction of the shear wall body plane. Since the acting direction of the horizontal load can be changed due to the change of the wind direction and the horizontal earthquake direction, the principal tensile stress may appear in both diagonal directions of the wall plane. However, in the cu...

AI Technical Summary

Problems solved by technology

When the crossed oblique cracks expand to a certain extent, the stiffness of the shear wall will be degraded, resulting in a decrease in the bearing capacity of the shear wall.

Under the action of rare earthquakes, the width of oblique cracks increases rapidly, and the sharply expanding crossing oblique cracks not only seriously reduce the stiffness of the shear wall, but also cause the horizontal and vertical steel bars at the cracks to yield, which will eventually lead to the failure of the shear wall , seriously affecting the bearing safety of high-rise buildings

In order to delay the occurrence and expansion of cross-slant cracks in the concrete of the shear wall, in the current design method of the shear wall, the minimum reinforcement ratio and the maximum reinforcement ratio are strictly stipulated for the horizontal reinforcement and the vertical reinforcement in the shear wall. Although the ductility and seismic performance of the shear wall structure are improved to a certain extent, it cannot overcome the problem of wall cracking caused by the large main tensile stress, and the reinforcement distribution in the wall is dense, the spacing is small, and the steel consumption is large. , and will bring difficulties in wall concrete vibrating construction

Images