混凝土小型空心砌块结构抗震性能研究

Study on Aseismic Performance of Small-size Concrete Hollow Block Structure

按相似理论设计制作了1∶6比例的7层混凝土小型空心砌块结构整体模型,进行了模拟三向地震振动台试 验,研究了模型结构的动力特性、位移反应及层间位移角反应,研究了模型结构在不同烈度地震动作用下的震害情 况以及结构的薄弱部位、开裂机理等.根据试验现象提出了四线退化型的恢复力模型,编制了非线性时程分析程 序,对原型结构进行了地震反应分析,在试验研究和理论分析的基础上评估了该类结构的抗震性能,为工程抗震设 计提供理论依据.

A 1∶6 scale model shaking table experiment of a seven-story building with small-size concrete hollow block was carried out. The model response of displacement and inter-story drift are measured,and its natural frequency,cracking intensity,failing mechanism and cracking positions are all discussed. Based on the results of the experiment,the framework curve and the hysteretic rule of degenerated four-linearity model are proposed. A non-linear history analysis program is compiled to calculate seismic response of the prototype structure,and a good agreement is achieved between the theoretical predictions and the experimental results,according to which seismic performance of this kind of structure is evaluated,which provides theory bases for using small-size concrete hollow block structure in anti-seismic engineering.