采用耗能装配节点的榫卯木构架抗震性能有限元分析

Finite element analysis of seismic performance of mortise and tenon wooden frame with energy-consuming assembly joints

摘要:

针对榫卯木构架常规梁柱榫卯节点的缺陷，提出了一种榫卯木构架的梁柱耗能装配节点。为研究耗能装配节点对木构架抗震性能的影响，利用有限元软件Abaqus建立了带有全钢耗能装配节点、橡胶柔性耗能装配节点、无加固的榫卯式节点三种不同类型榫卯木构架的有限元模型，并进行了单调荷载加载分析和低周反复加载分析，主要研究了三类不同榫卯木构架模型的破坏特征、滞回曲线、骨架曲线、承载力及耗能能力等力学性能。同时，利用能力谱曲线和需求谱曲线，采用性能点探讨了三类木构架的抗震性能。结果表明，与原榫卯木构架相比，该耗能装配节点能够有效的调整和控制木构架的破坏模式，增强了梁柱节点的非线性力学性能，显著提高了榫卯木构架的整体抗震性能。

Abstract:

Aiming at the defects of conventional beam-column mortise-tenon joints for mortise and tenon timber frame , a beam-column energy-consuming assembly joint of mortise and tenon timber frame is proposed. In order to study the influence of energy-consuming assembly joints on the seismic performance of timber frames, the finite element models of three different types of mortise and tenon timber frames with all-steel energy-consuming assembly joints, rubber flexible energy-consuming assembly joints and original mortise-tenon joints were established by finite element software Abaqus. The monotonic loading analysis and low cyclic loading analysis were carried out.The mechanical properties of three different mortise and tenon timber frame models were mainly studied, including the failure characteristics, hysteresis curve, skeleton curve, bearing capacity and energy dissipation capacity. Meanwhile, using the capacity spectrum curve and the demand spectrum curve, the seismic performance of the three types of timber frames is discussed by using the performance points.The results show that compared with the original mortise-tenon timber frame, the energy-consuming assembly joint can effectively adjust and control the failure mode of the timber frame, enhance the nonlinear mechanical properties of the beam-column joints, and significantly improve the overall seismic performance of the mortise-tenon timber frame.