水泥由在建设期间在增强的具体框架结构的动态行为上操作构造设备的时间变体橡皮模量,扔的结构的部件,集合暂时的 shoring 框架系统,和吃惊的效果被调查。一个八楼层的增强的具体框架的动态测试在 full-scaled 期间组织第六个楼层构造周期的阶段被周围的颤动执行。自然频率,相应模式形状和抑制比率被在频率领域处理测试信号数据的力量光谱决定。在不同构造阶段的频率,模式形状和抑制比率的变化被给。结果证明自然频率和形式的抑制比率在扔新鲜水泥的舞台到达最大值,特别为更高的模式。在每个构造阶段的形式的抑制比率在用法期间是不到 5% 那些。
The effects of concrete’s time-variant elastic modulus,casting structural components,assembling temporary shoring framework system,and shock by operating construction equipment on dynamic behavior of the reinforced concrete frame structure during construction were investigated. The dynamic tests of an eight-storey reinforced concrete frame structure during full-scaled stages of the sixth storey construction cycle were carried out by ambient vibration. Natural frequencies,corresponding mode shapes and damping ratio were determined by power spectrum processing the tested signal data in frequency domain. The changes of frequencies,mode shapes and damping ratios at different construction stages were given. The results show that natural frequencies and modal damping ratios reach the maximum at stage of casting fresh concrete,especially for higher modes. Modal damping ratios at each construction stage are less than 5% of those during usage.