摘要
对冷弯C型钢框架节点的抗震性能进行试验研究与分析。为研究节点板厚度和螺栓间距两因素对节点抗震性能的影响,设计4个不同节点板厚度及螺栓间距的T形梁柱节点试件。试件具体构造为:梁柱均采用双肢冷弯C型钢,梁柱之间以热轧钢板内插作为节点板,梁柱均在腹板处用4个高强螺栓与节点板连接。通过加载试验,发现4个试件都为冷弯型钢的受弯承载力破坏,并得到节点在循环荷载作用下的M-φ和P-Δ滞回曲线,对节点的破坏机理、承载力退化、刚度退化、延性及耗能性能进行相应的探索性分析。试验结果表明:该种构造的节点具有抗弯承载力高、承载力退化稳定、如初始刚度大则刚度退化严重、耗能性能好、延性差的特点。
This paper conducts an experimental investigation and analysis on the seismic performance of joints of cold-formed steel frame of C-section. Four T-shape beam-to-column joints with different gusset plate thickness and bolt pitch under periodic load are designed. The configurations of bolted moment joints of all structural members such as beams and columns are formed with two lipped C-section back-to-back, moment connections between beams and columns are formed with hot-rolled steel gusset plates, only the webs of lipped C-section are bolted onto gusset plates with high strength bolts, and four high strength bolts per member are used as a minimum configuration. Four T-shape beam-to-column joints all experience flexural failure of cold-formed steel. They were tested under cyclic load to measure the strain distribution of the joint members as well as M-φ and P-△ hysteresis curves. Also, the failure mechanics, stiffness degradation, hysteretic property, ductility and energy dissipation ability were discussed. For all the tests, the structures have high moment capacity, stable capacity degradation, high initial stiffness, and severe degradation of stiffness, good energy dissipation capability but bad ductility .
出处
《土木工程学报》
EI
CSCD
北大核心
2008年第9期34-39,共6页
China Civil Engineering Journal
基金
内蒙古自然科学基金(200711020701)
关键词
轻型钢结构
抗震性能
螺栓连接
节点
light-weight steel structure
seismic performance
bolted connection
joint
