MTMD-耗能框架填充墙减震数值分析

在多功能围护墙减震结构体系中，围护墙作为一个质量调谐减震阻尼器（TMD）中的质量块，可以克服传统框架结构在动力荷载作用下不能持久耗能的缺点。为了研究新型围护墙减震结构的减震性能，使MTMD减震技术更好的应用于结构设计，结合MTMD体系的减震原理、参数优化设计方法，对MTMD-钢框架结构系统的减震装置参数进行分析；应用SAP2000数值分析软件对结构的振动特性进行计算；采用时程分析法分别对普通钢框架、MTMD减震钢框架的地震反应进行对比分析。计算结果表明：基于多功能围护墙减震结构体系的MTMD钢框架具有显著的减震效果。模态分析得出各阶振动周期相应增大2-3倍；从时程分析结果来看，能够有效地减小结构地震反应峰值，减震效果一般在5%-40%之间。为MTMD在结构抗震方面的设计提供理论依据

Numerical analysis on shock absorption and damping effect of frame structure-MTMD

The enclosure wall vibration-absorption structure is a new kind of frame structure with MTMD system,in which the enclosure wall acts as a mass block in TMD,can overcome the shortcoming that the frame structures can’t absorb energy persistently.In order to study the vibration-absorption effect of the MTMD in enclosure wall structures and apply the MTMD technology in structure design conveniently,damping parameters of vibration-absorption device in MTMD-steel frame structure were studied based on the vibration-absorption principle of MTMD systems and parameter optimal design method.The vibration performance of the structure was calculated by using the finite element software SAP2000.By the time-history analysis,the accelerations and displacements of the traditional steel-frame model and MTMD-steel frame model were compared.The results indicate that: MTMD-steel frame structure with the enclosure wall has a significant seismic reduction effect.The periods of the MTMD model are 2 or 3 times more than those of the general frames according to the modal analysis.It can effectively reduce the structural response;the damping rate reaches generally about 5%-40% in accordance with the time-history analysis,.The analysis provides a theoretical basis and reference to construction design.