摘要
为进一步研究所设计的装配式梁柱节点性能,基于大型有限元数值平台ABAQUS,通过建立低周往复荷载作用下装配式钢管混凝土柱—钢梁节点三维有限元模型,综合考虑材料非线性和几何非线性,并与节点试验结果对比,从滞回曲线、骨架曲线、延性系数以及耗能等方面进行了多工况数值计算,分析了加强环板尺寸和形状、轴压比及有无垫板等对装配式钢管混凝土柱—钢梁节点性能的影响规律,在此基础上,进一步对该装配式梁柱节点进行了参数化数值外推分析,探讨了节点受力变形规律和破坏机理,计算结果表明该节点模型当轴压比为0.8时,节点承载力明显降低,当钢管厚度达到8 mm时,钢管厚度对节点性能影响不显著。
To study the performance of assembled con nections ,a three-dimensional numerical model of an assembled concrete-filled steel tube column-beam connection under low cycl ic loading was established by considering both nonlinearity of material and geometry based on FE （F in ite Elem ent） platform of ABAQUS. Effects of stiffened ring p la te ,axial compression ratio and backing plate on the hysteresis curves, skeleton curves, ductility coefficient and energy dissipation coefficient were analyzed. Furthermore, parametric analyses with comparison were also conducted to discuss the performance and damage mechanism of the assembled connection. The computational results show that when the axial compression ratio reaches 0. 8 ,the bearing capacity of the given model decreases obviously. Furthermore,when the tube thickness reaches 8 mm ,the influence of tube thickness onjoint performance are not obvious any more.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2017年第1期156-164,共9页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金面上项目(51578100)
北京市博士后基金项目(2014ZZ-49)
中央高校基本科研业务费专项资金资助(3132014326
3132016216)
关键词
钢管混凝土柱
钢梁
装配式节点
数值分析
低周往复荷载
concrete-fined steel tubular columns
steel beam
fabricated joint
numerical analysis
low-reversed cyclic loading
