约束混凝土砌块结构抗震性态研究

性态抗震设计已成为结构抗震设计的发展趋势,本文以约束混凝土砌块结构为对象,在提出约束混凝土砌块墙承载力计算公式的基础上,建立了砌块墙片的恢复力模型。对3座不同层数的典型约束混凝土砌块结构,在代表不同场地类别、不同地震动强度的输入下分别进行了动力非线性时程分析和静力非线性分析。通过计算结果的对比,讨论了2种分析方法中场地类别、地震动强度、静力非线性分析中侧力分布模式等影响,所得结论可以为用静力非线性分析估计砌块结构的抗震性能提供有益的参考依据。

Seismic performance of confined concrete block structures

It has been recognized that the seismic performance-based design should be used as a common method in seismic design of structures.Expressions for evaluating the seismic capacity of confined concrete block(CCB) wall combined with its restoring force characteristic model are proposed in this paper.Then the proposed model is applied to the nonlinear dynamic response and the nonlinear static-pushover analyses with different lateral force distributions of three typical CCB buildings of six,seven and eight stories.Based on the obtained numerical results the effects of site condition,input acceleration level and lateral force pattern in the pushover analysis,etc.on structure responses are discussed and some conclusions are reached.They would be beneficial for the application of the pushover analysis to the seismic performance evaluation of CCB buildings.