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用于多层住宅的新型复合结构在水平地震作用下,可能会出现三类耗能机制:支撑梁铰机制、支撑柱铰机制、混合耗能机制。本文对此进行了抗震耗能机制分析,选出一榀复合结构,根据虚功原理,经过计算、分析、筛选,推导出了各种耗能机制的极限荷载半解析解。据此,笔者认为支撑梁铰机制为较好的抗震耗能机制,其次为混合机制,尽量避免出现支撑柱铰耗能机制。
Three kinds of energy dissipation mechanisms may occur in the new composite structure used in multi-storey residential buildings under the action of horizontal earthquake: supporting beam hinge mechanism, supporting column hinge mechanism and hybrid energy dissipation mechanism. In this paper, the seismic energy dissipation mechanism is analyzed and a composite structure is selected. According to the virtual work principle, the limit load semi-analytical solutions of various energy dissipation mechanisms are deduced through calculation, analysis and screening. Accordingly, I believe that the support beam hinge mechanism is a better earthquake energy dissipation mechanism, followed by a hybrid mechanism, try to avoid the support column hinge energy dissipation mechanism.