剪力墙结构、框架填充墙结构模型模拟地震试验研究

SIMULATED EARTHQUAKE TESTS OF SHEAR WALL AND INFILLED FRAME MODELS

对三种结构体系的模型，即钢筋混凝土剪力培结构、钢筋混凝土框架砖填充壤结构和钢框架混凝土填充墙结构模型，进行了地震模拟振动台试验研究．三种结构的模型均为４层，１／３几何比例，整体尺寸相同，按静力等强度原则进行设计。利用５ｍ×５ｍ液压振动台逐渐增大输入地震的峰值加速度直至模型破坏，在试验过程中测量并比较三种模型在弹性和开裂等状态时加速度、位移、应变的反应情况，并用微幅激振测定模型在相应状态下动力特性的变化，从而综合比较和研究它们的地震反应、破坏机理和抗震能力。

Three models of different structural wall systems, namely: reinforced concrete shear walls, reinforced concrete frames with masonry infills and steel frames with concrete infills, were subjected to simulated earthquake tests. The three models tested were 1/3 scale models of typical units of four storey walls having the same overall dimensions and were designed to have approximately the same static strength. They were each subjected to a sequence of simulated earthquakes of progressively increasing amplitude until ultimate failure on a 5m×5m hydraulically actuated shake table. During the tests, the acceleration,displacement and strain responses of the models at different states were measured. The models were also subjected to small amplitude vibration tests to determine their dynamic properties and the corresponding changes at vaious states. Based on the test results, the seismic behaviour, fisilure mechanisms and seismic resistances of the different structural systems are studied and compared.