单层全预制装配式楼板建筑结构自由振动分析OA

To investigate the impact of the panel vibrations in precast assembled floor structures on the dynamic characteristics of an entire building structure,a single-story fully precast assembled floor structure is taken as an example.The precast panels are simplified as concentrated masses,and the dry connection support nodes between each precast panel and the beam are simplified as damper-spring support nodes.Consequently,the concentrated masses are attached to the supporting beam,and the end precast panels,together with the vertical lateral force-resisting system,are simplified as elastic supports of the beam.An analytical model for a homogeneous beam with elastic supports and an arbitrary number of concentrated MSD systems is thus proposed.Based on the Euler-Bernoulli beam theory and Wu's proposed matrix transfer calculation method derived by replacing the spring-damping-mass system with a set of effective masses.the theoretical solution for the natural frequency of this model is derived.In an engineering example,the accuracy of the theoretical solution for natural frequencies is verified using finite element analysis.Finally,the influence of considering the vibrations of precast panels on the natural vibration characteristics of fully precast assembled floor structures is discussed,providing theoretical support and reference for similar projects.