剪切型转动粘弹性阻尼器在村镇木结构抗风中的应用-《建筑科学与工程学报》

文章信息/Info

Title:: Application of Shear-rotation Viscoelastic Damper in Wind Resistance of Rural Wood Structure

Author(s):: LI Hong-nan, NI Pei-hua, FU Xing; Faculty of Infrastructure Engineering, Dalian University of Technology

Keywords:: wind-resistance design; viscoelastic damper; vibration control; rural wood structure

摘要:: 针对强台风下村镇低矮房屋的大量倒塌，将阻尼器引入村镇木结构的抗风控制中；同时针对现有木结构模拟中榫卯节点的恢复力模型多采用线弹性，没有考虑节点塑性变形而导致与实际情况存在很大差别的问题，在木结构分析时考虑节点的塑性特征。分析了该结构在强风作用下的动力反应，通过数值模拟验证了粘弹性阻尼器在木结构抗风减振方面的良好效果。结果表明：考虑节点非线性时木结构的层间位移明显减小，阻尼器的耗能也有所减小，但对减振率影响不大。

Abstract:: A damper was applied in low-rise wood structure to resist wind load as many low-rise structure collapsed under the strong wind load. Aimed at the problem that mortise and tenon joint rotation model was different from actual situation because of linear elasticity in the existing simulation of wood structures and without considering plasticity deformation, the plasticity of mortise and tenon joint was considered in the structure analysis. The dynamic response and control effect of the structure under strong wind were analyzed, and viscoelastic damper was verified to have great effect on the vibration control of the wood structure under wind load by numerical simulation.The results show that considering nonlinear joint, the story drift of wood structure decreases greatly and the energy dissipation of the damper also decreases, but the nonlinear joint does not affect the reduction ratios.