采用耗能支撑对框架结构进行抗震加固的结构地震反应分析

The Earthquake Dynamic Response Analysis of the Strengthening Frame Structure with Energy Dissipation Brace

作为耗能支撑的一种,黏滞耗能支撑具有显著的耗能特性,能有效地耗散结构的地震反应。在结构层间框架柱之间附设黏滞耗能支撑能提高结构的附加阻尼比,因而会降低结构的地震反应并确保主体结构免遭地震破坏。结合一个抗震加固改造工程实例,对附设黏滞耗能支撑前后的框架结构进行了弹塑性地震反应分析。框架结构的非线性时程分析结果表明,附设黏滞耗能支撑对框架结构减震效果显著,黏滞耗能支撑能较大提高框架结构的抗震安全储备,适用于新建的或已有建筑结构的抗震加固。

As one of energy dissipation brace, viscous energy dissipation braces （VEDB） have excellent damping capacity and they can effcctively reduce structural earthquake response. VEDB are installed between two interlayer frame posts to increase the additonal damping ratio and reduce the response under earthquake action. Be combined with one aseismatic practical frame, this paper will have an earthquake dynamic response time-history analysis of the origin and VEDB frame structure. The results of nonlinear time-history analysis verify that the shock absorption ability of VEDB is excellent, which can ensure structure safe greatly.VEDB are applicable forall frames in aseismatic strengthening especially.