高性能钢-混组合板激励响应动力特性试验

Experimental Dynamic Characteristics of Excitation Response for High Performance Steel-Concrete Composite Plate

基于楼板振动性能研究现状,通过研发的空气调频激励装置及其测试方法,以压力传感检测系统为核心控制参数,提出装配式高性能钢-混组合板模型,进行激励响应动力特性试验。结果表明,该种动力特性时程分布特征由瞬态阶段、稳态阶段和衰减阶段三种状态组成,不同位置处激励响应传播特性一致,加速度、位移、应变等动力响应幅值均不同。该方法可应用于大型水工建筑物板结构及组合楼板结构基频测试与识别等实际工程中。

The high performance fabricated steel-concrete composite plate model was proposed based on the research status of floor vibration performances.Through the pressure sensor detection system related to the core control parameters,and its testing method,dynamic characteristic test on excitation response was launched by air frequency modulation exciter.The results show that this kind of time-history distribution of dynamic characteristics consists of three states:transient phase,steady phase and attenuation phase.Moreover,its propagation characteristics of excitation response are consistent at different locations,but the amplitudes of dynamic response are different for its acceleration,displacement and strain.This analysis method can provide engineering application value for the fundamental frequency test and identification in the large hydraulic structures and composite floor structures.