悬臂踏步板装配式楼梯多层砖房模型振动台试验研究

SHAKING TABLE TEST OF MULTYSTORY MASONRY BUILDING MODEL WITH PRECAST CANTILEVER STAIRS

介绍了一幢四层砖混结构模型的地震模拟振动台试验．模型为１／４比例，采用悬臂踏步板装配式楼梯．输入了不同峰值的地震加速度，直至破坏．通过试验，研究了房屋的破坏特征，悬臂踏步板装配式楼梯的工作性能及加速度与位移反应等问题，此外，用微幅激振法测定了模型在弹性、初裂及破坏状态下动力特性的变化．

In this paper,a shaking table test of a 1/4 scale four-story masonry building model with precast cantilever stairs is Introduced. The model was subjected to a sequence of simulated earthquakes of gradually increasing peak acceleration up to failure. Through the test,the performance of the precast cantilever stairs,the acceleration and displacement response and failure characteristics of the building model were studied. In addition, forced sinusoidal vibrations with small amplitude were applied to the model in order to measure its dynamic behavior at elastic,crack and failure stage. Finally,the test results are compared with those obtained from the nonlinear dynamic response analysis.