Dynamic shaker testing of a ten-story reinforced concrete building

Dynamic shaker tests were performed on a ten-story concrete infilled RC frame structure to obtain its dynamic properties and their changes due to the damage introduced during the tests. The test structure was extensively instrumented using an array of 60 accelerometers which were installed at two opposite corners of each floor slab except for the roof. An eccentric mass shaker was installed over the second story slab to produce harmonic excitations along the two horizontal directions and at a 45-degree angle between those. A total of 87 forced vibration excitations were performed and 52 hours of ambient vibrations were recorded during the testing period. Moreover, during the wall demolition process, free vibration responses of the structure due to the impulses imposed by a jack hammer used for infill demolition were recorded.

为获取某十层内含混凝土填充墙的钢筋混凝土（Reinforced Concrete, RC）框架结构的动力特性及其因试验过程中引入损伤而产生的变化，研究人员对该结构开展了动力激振试验。该试验结构布设了由60个加速度传感器组成的测试阵列，除屋顶楼层外，其余各层楼板的两个对角位置均安装了该类传感器。偏心质量激振器安装于二层楼板上方，可沿两个水平方向及其夹角45度的方向产生简谐激励荷载。试验期间共完成87次强迫振动激励测试，并采集了总计52小时的环境振动数据。此外，在墙体拆除作业过程中，研究人员还记录了结构因填充墙拆除所用风动凿岩机产生的冲击荷载所引发的自由振动响应。