多层空心砌块房屋混凝土结构抗震性测试研究

Seismic Test of the Concrete Structure of Multi-story Hollow Block Buildings

摘要:

为了研究多层空心砌块房屋混凝土结构抗震性测试，按照1∶5缩尺比例建造空心砌块房屋混凝土结构模型进行抗震性测试实验。根据实际原型参数遵从相似理论的要求选择模型参数，通过电液伺服加载装置和液压千斤顶加载水平、垂直方向荷载，对所建造模型进行动力特性测试、地震反应分析、结构最大地震反应以及位移响应进行了实例分析。结果表明，随着破坏程度加大，模型结构自振频率随之减小，阻尼比随之增大；有芯柱多层空心砌块房屋模型的抗震效果较强；强震状态下，结构动力特性变化较大，破坏层聚集了房屋结构的最大反应；当加速度为125 cm/s时，结构最大位移为2.73 mm，低于规范值，模型结构具备一定延性。

Abstract:

To study the seismic resistance of the concrete structure of multi-story hollow block houses, seismic tests were carried out on the concrete structure of a model six-story hollow block house, scaled 1:5. Model parameters were selected according to actual prototype parameters and requirements of the similarity theory, and horizontal and vertical loads were applied by an electro-hydraulic servo loading device and hydraulic jack. A dynamic characteristic test, seismic response analysis, structural maximum seismic response, and displacement response analysis were carried out. Results showed that, with increasing degree of damage, the natural frequency of the model structure increased while damping ratio decreased. Seismic effect on the multi-story hollow block building model with core column was strong. Under strong earthquakes, dynamic characteristics of the structure changed greatly, and the failure layer displayed the maximum response of the building structure. When the acceleration was 125 cm/s, the maximum displacement of the structure was 2.73 mm, lower than the standard value, indicating that the model structure had certain ductility.