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分别采用可以为墙体提供不同上下边界约束条件的加载框架,对2个单层单跨屈曲约束开竖缝钢板剪力墙试件进行拟静力试验,研究不同墙体布置情况下由于梁转动导致的对墙体破坏模式、初始刚度、耗能能力和累积塑性变形能力等的影响。试验结果表明:梁转动不但会加速墙体发生屈曲破坏,而且还会削弱其初始刚度、耗能能力以及累积塑性变形能力,其中,梁转动对初始刚度的削弱程度与梁转动影响系数成正比,且若要保证发挥至少85%的初始刚度,则必须限制梁转动,使得梁转动影响系数(定义梁转动影响系数为墙体屈服时刻梁转角和屈服层间位移角的比值)不超过0.18。此外,两侧约束部件对钢板面外约束不足也会限制其耗能能力的发挥。
In this paper, two loading frames with different upper and lower boundary conditions are used respectively to simulate the pseudo-static tests of two single-layer single-span buckling restrained shear-wall shear wall steel plates. Resulting in the failure of the wall mode, the initial stiffness, energy consumption and cumulative plastic deformation capacity. The experimental results show that the beam rotation not only accelerates the buckling failure of the wall, but also weakens the initial stiffness, energy dissipation capacity and cumulative plastic deformation capacity. The degree of weakening of the initial stiffness of beam rotation is proportional to the influence coefficient of beam rotation, In order to guarantee the initial stiffness of at least 85%, the beam rotation must be limited so that the influence factor of the beam rotation (the ratio of the beam rotation influence coefficient to the displacement angle between the yielding moment and the yield point) is less than 0.18. In addition, the restraint on both sides of the steel sheet surface constraints outside the constraints will also limit the energy consumption of its play.