三向地震激励下超限大悬挑结构消能减震分析

Seismic Energy Dissipation of Super-span Cantilever Structure to Three Dimensional Earthquake

针对某超限大悬挑钢筋混凝土结构在单向地震作用下满足规范要求,而在三向地震作用下层间位移不满足规范要求的问题,基于实际工程引入消能减震措施,建立有限元分析模型,分析了三向地震输入对大悬挑钢筋混凝土结构地震响应的影响。结果表明:结构增设黏滞阻尼器后,能有效降低了三向地震输入下结构的地震响应,改善结构整体抗震性能,可以为同类结构提供参考。

In respect to the fact that storey drift of super-span cantilever reinforced concrete structure might not meet design code specifications under three dimensional earthquake action while it could under unidirectional earthquake action,based on practical engineering,the energy dissipation technique is introduced,and finite element analysis model is formulated.Influence of three dimensional earthquake input on seismic response of the structure is analyzed.The results show that the structure with viscous dampers could effectively mitigate seismic response under three dimensional earthquake action,and could improve overall seismic performance of the structure.It is expected to provide reference for similar structures.