装配式轻钢房屋科普房振动台试验研究

对单层足尺装配式轻钢科普房屋模型进行振动台试验，得到了房屋在地震作用下的动力特性，包括自振频率、阻尼比，选取2条实测自然地震波记录和1条人工合成地震波，分析了模型在不同地震作用下的地震响应，包括加速度响应、位移响应等，结果表明：装配式轻钢房屋自振频率可采用规范推荐方法进行计算；在地震作用前后，自振频率和阻尼比无明显变化，表明结构刚度无退化现象，装配式轻钢房屋在弹性阶段的阻尼比建议取0.03；结构的薄弱部位如门窗洞口、墙体端柱、过梁等连接处和墙体骨架、覆面板等主要抗侧力构件均未出现明显的变形和破坏现象，且试验结束后房屋变形可恢复；在多遇和罕遇地震作用下，结构最大层间位移角为1/836和1/124，满足我国现行规范关于结构层间位移角限值的规定，具有良好的抗震性能。

Shaking table test on prefabricated light steel structure popular science building

A shaking table test was performed on a full-scale model of a single-story fabricated light steel popular science building to obtain the dynamic characteristics including the natural frequency and damping ratio. Two actual seismic records and one artificial seimic wave were used in the test to obtain the seismic responses, including the acceleration response and displacement response of the model under different levels of earthquakes. The test results showed that the structural natural vibration frequency could be calculated using the method that the standards recommend; no significant change is observed in the natural vibration frequency and damping ratio of the building after subjected to earthquakes, which indicated that there is no degradation of the structural stiffness. It is further suggested that the damping ratio of prefabricated light steel structures in the elastic stage can be taken as 0.03. The test results also showed that no obvious deformation and failure are observed in the weak parts including the connecting positions such as the openings, end studs and lintels as well as the main lateral resisting components such as the wall frame and panels. The deformation of the house is found to be recoverable after test. The maximum elastic inter-story drift ratio of the structure under frequent earthquakes and rare earthquakes are 1/836 and 1/124, respectively, which meet the requirements of the Chinese code and showed good seismic performance of this structure.