底端固结在基础上的剪力墙，在地震中墙角最易损伤破坏，且耗能较差,震后不宜修复等问题。本文提出了一种新型竖齿摇摆自复位剪力墙（SCVT-SW）体系。SCVT-SW体系由钢筋混凝土墙体、碟簧复位装置、软钢阻尼器以及竖齿摇摆支座等组成，所有部件均通过高强螺栓相连，便于施工和震后对受损部件更换。SCVT-SW体系的工作原理是：在地震过程中，由墙体两侧的竖向碟簧复位装置提供墙体摇摆复位弯矩，软钢阻尼器消耗地震能量，竖齿摇摆支座在提供水平抗剪能力并将墙体受到的水平作用力传递到墙体基础的同时起到固定铰支座的作用。理论分析给出了SCVT-SW体系中墙体截面的正截面承载力计算公式。通过非线性数值模拟，对新型剪力墙与普通剪力墙的受力性能进行了对比，设计了9组不同工况的对比参数。结果表明：与普通剪力墙相比，SCVT-SW骨架曲线没有明显下降段，残余变形更小；SCVT-SW体系的正截面承载力随着墙角两侧碟簧装置的预压力的增大而提高，最大提升27.8%；残余变形随碟簧装置刚度增大而减小，工况7比工况5减小了19.4%，工况8比工况5减小了46.9%，因此通过增大碟簧装置预压力与碟簧装置刚度来减小SCVT-SW的残余变形，提高复位能力的效果是显著的。
Abstract
The bottom of the consolidated shear wall on the foundation, in the earthquake the most easy to damage the wall wall, and energy consumption is poor, it is not suitable to repair after the earthquake. In this paper, a new system of oscillating self-resetting vertical tooth shear wall (SCVT-SW) is proposed. The SCVT-SW system consists of reinforced concrete walls, disc spring resetting devices, mild steel dampers and vertical tooth swing supports, all of which are connected by high-strength bolts to facilitate construction and replacement of damaged parts after an earthquake. The working principle of SCVT-SW system is as follows: in the process of earthquake, the vertical disc spring resetting device on both sides of the wall provides the wall swaying reset bending moment, the mild steel damper consumes the seismic energy, and the vertical tooth swaying support plays a role of fixing the hinge support while providing the horizontal shear resistance and transferring the horizontal force on the wall to the wall foundation. The calculation formula of wall section bearing capacity in SCVT-SW system is given. Through nonlinear numerical simulation, the mechanical properties of the new shear wall and the ordinary shear wall were compared, and 9 groups of different working conditions were designed. The results show that, compared with ordinary shear walls, the skeleton curve of SCVT-SW has no obvious descending section and the residual deformation is smaller. The bearing capacity of SCVT-SW system increases with the increase of the prepressure of the disc spring device on both sides of the corner, and the maximum increase is 27.8%. The residual deformation decreases with the increase of the stiffness of the disc spring device, and the reduction of 19.4% in working condition 7 compared with working condition 5 and 46.9% in working condition 8 compared with working condition 5. Therefore, the residual deformation of SCVT-SW can be reduced by increasing the prepressure and stiffness of the disc spring device, and the effect of improving the reset ability is significant.
关键词
自复位剪力墙 /
碟簧装置 /
摇摆支座 /
滞回性能 /
功能可恢复
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Key words
self-centering shear wall /
Disc spring device /
Swinging support /
Hysteretic performance /
Function recoverable
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