房屋屋顶隔热层(TMD)减震控制系统研究

Study On Seismic Control System of Thermal-insulating Roof of a Building

为了改善房屋结构的抗震性能,实现房屋结构减震设计的可靠性和有效性,提出了利用多层房屋结构屋顶隔热层作为TMD装置系统来达到减震的设想。建立了TMD控制结构的力学模型,并应用其中的双线型恢复模型描述橡胶隔震垫的弹塑特性,进一步对屋顶隔热层作为减震装置的构造设计。通过位移时程分析使结构各楼层的位移峰值得到了显著降低。工程实例计算表明,屋顶隔热层作为减震控制系统设计是可行和实用的。

In order to improve the effect of shock absorption of a structure, the authors propose that the thermal-insulating roof of multi-storey building should be used as TMD system to reduce seismic response. The dynamic analysis mode for a structure with TMD is set up and the isolated supporting is modeled using bi-linear hysteretic model. And the construction design of the thermal-insulating roof with TMD system is further studied. The results obtained from time history of displacement analysis show that thermal-insulating- roof-as-TMD can reduce the seismic response of a multi-storey building .At last, a numerical simulation is used to test the feasibility and practicality of this design.