联肢剪力墙连梁阻尼器地震模拟试验研究

Seismic simulation test for coupling beam damper of coupled shear wall structure

采用拟动力试验方法,对连梁阻尼器进行地震模拟试验研究,模拟结构的真实地震响应。首先,选取简单的单片双肢剪力墙结构模型,每层附加一个连梁阻尼器,选取El Centro和Taft两条地震波,分别进行35gal、140gal、220gal和620gal拟动力试验,构成8种试验工况;随后将其等效成单质点附加阻尼器体系,单质点系作为数值子结构,附加的阻尼器作为试验子结构,进行拟动力子结构试验,同时进行数值仿真验证。对比数值模拟与试验结果得出:拟动力子结构试验可以真实模拟结构地震响应;地震波输入过程中,连梁阻尼器性能稳定,无局部屈曲,对结构的减震效果良好,地震动能量输入越大,阻尼器发挥的作用越大。

Eight working conditions of seismic simulation tests for coupling beam damper were proposed and the earthquake response of structures were simulated by these pseudo-dynamic tests.A simple single plate coupled shear wall structure model with coupling beam damper on every floor was studied first.The eight working conditions were El Centro seismic wave and Taft seismic wave with acceleration amplitudes of 35gal,140gal,220gal and 620gal,respectively.Second,the method of how to equivalent the model above to a single mass system attached with damper was proposed.In the pseudo-dynamic substructure test,the single mass system was considered as numerical substructure and the attached damper was considered as testing substructure.Meanwhile,numerical simulation was done to verify the test.Some useful conclusions can be obtained after the test and simulation.The pseudo-dynamic substructure test can simulate the structural response under earthquake actions well,and the working performance of coupling beam damper is stable without local buckling under seismic history with different intensity.The coupling beam damper can inhibit the response of structure when earthquake occurs,the more the energy of earthquake is the better the function of damper does.