摘要
本文进行了8个薄壁方钢管混凝土柱与薄壁方钢管梁连接节点缩尺模型的拟静力试验和采用约束本构模型(考虑钢管对混凝土的套箍系数)的数值模拟,即梁柱直接焊接节点和梁柱加腋节点。比较了这两类节点在不同轴压比下的破坏模式、滞回曲线、承载能力和耗能能力。试验和数值模拟结果表明:①节点破坏现象大多发生在节点域柱壁撕裂和梁壁鼓曲并产生塑性铰,梁柱加腋节点的整体承载性能优于直接焊接节点;②数值模拟方法能很好地预测节点的滞回性能,加腋板能提高节点的承载力和累积耗能能力,使节点满足"强柱弱梁,节点更强"的抗震设防要求。加腋节点承载性能和数值模拟方法可以为该类节点的工程应用和进一步研究提供参考。
Pseudo-static test of reduced-scale models and numencat SlIIIUlULIU! of thin-walled square-steel-tube concrete-columns and thin-walled square-steel-tube beam connections, which named the normal welding connection and the haunched-welding connection, and the ferrule coefficient of steel- tube into its concrete for the connections＇ constraints constitutive model is considered in the numerical simulation. The two types of connections with hysteresis curve, failure mode, bearing capacity and energy dissipation capacity under the different axial compression ratio are compared. The test and numerical simulation results show that： （~） the connections＇ failure phenomena occurs mostly in column-wall tear of the joint region and beam-wall drum-curved and plastic hinge, the haunched-welding connection＇ overall bearing capacity are better than the normal welding connection; （~） the numerical simulation method can forecast connection＇ hysteretic behavior, haunched-plate can improve the connection＇ bearing capacity and cumulative energy dissipation capacity, the haunched-welding connection can meet requirements of seismic resistance ＂weak beam and strong column, connection stronger＂. The bearing capacity of the haunched-welding connection and numerical simulation method can provide reference for engineering applications and further study of this type of connection.
出处
《建筑科学》
北大核心
2014年第1期80-86,97,共8页
Building Science
基金
国家高技术研究发展支撑计划(863计划)项目(2009AA032304)
四川省科技厅科技支撑计划项目(2011GZ0043)
关键词
薄壁方钢管混凝土柱
梁柱节点
拟静力试验
数值模拟
承载性能
thin-walled square-steel-tube concrete-column
beam-column connection
pseudo-static test
numerical simulation
bearing capacity
