土-结构动力相互作用影响的TMD控制研究

对均质剪切梁－埋置刚性基础－粘弹性半空间模型应用子结构方法,对生趣入射ＳＨ波,导出了调频质量阻尼器（ＴＭＤ）控制时结构反应的解析解。通过设置ＴＭＤ将上行波完全吸收,实现对结构的控制,由此得到ＴＭＤ参数的频率领事性。进而选择的ＴＭＤ参数,控制相互作用体系的第一振型。通过算例,对无控、全控和主控三种工况下的结构反应及控制效果进行了比较分析。

Research on TMD control considering soil-structure interaction

In this paper, the structure is simulated as a uniform shear beam supported on a rigid foundation embedded in the soil represented by a uniform visco-elastic half space. The closed form structural responses are deduced using substructure method for seismic excitation represented by vertically incident SH waves. Control of structure is realized by setting TMD (Tuned Mass Damper) which makes the upward propagating waves absorbed at the top of the structure and no downward propagating waves reflected. Subsequently, the frequency-dependent character of the parameters of TMD is acquired. Furthermore, control of the first mode of the soil-structure system is realized by choosing the parameter of TMD. Structural responses and effectiveness of the control are compared and discussed for three working patterns named no control, completely control and first mode control.