考虑加载制度影响的狗骨式连接钢框架子结构抗震性能试验研究

发布时间：2018-03-23 01:07

本文选题：钢框架子结构　切入点：狗骨式连接　出处：《建筑结构学报》2017年04期 　论文类型：期刊论文

【摘要】：为研究加载制度对狗骨式连接钢框架结构变形能力及累积耗能能力的影响,设计了5榀单跨狗骨式连接钢框架子结构,对其进行单向加载、等位移循环加载、标准加载及近场地震动作用下的拟静力试验。结果表明:所有框架出现的塑性铰均在钢梁端部的翼缘削弱位置,避免了钢梁端部焊缝的过早脆性断裂;狗骨式连接钢框架结构滞回曲线饱满、变形能力及延性性能优良。此外,加载制度对狗骨式连接钢框架子结构的层抗侧刚度、水平承载力退化、极限变形能力及累积耗能能力均有显著影响。等位移循环时,加载位移幅值越小,狗骨式连接钢框架子结构的层抗侧刚度及承载力退化越趋于缓慢,其层间累积延性系数及等效能量耗散系数越大。
[Abstract]:In order to study the effect of loading system on deformation capacity and cumulative energy dissipation capacity of steel frame structure with dog bone connection, five steel frame substructures with single span dog bone connection were designed and subjected to unidirectional loading and cyclic loading with equal displacement. The results of quasi-static tests under standard loading and near site vibration show that all the plastic hinges of the frame are weakened at the flange of the end of the steel beam, thus avoiding the premature brittle fracture of the weld seam at the end of the steel beam. The hysteretic curve of the steel frame structure with dog bone connection is full, the deformation ability and ductility are good. In addition, the loading system degenerates the lateral stiffness and horizontal bearing capacity of the steel frame frame structure with dog bone connection. The ultimate deformation capacity and accumulative energy dissipation capacity are significantly affected. The smaller the loading displacement amplitude is, the slower the degradation of lateral stiffness and bearing capacity of dog-bone steel frame structure is. The interlaminar cumulative ductility coefficient and equivalent energy dissipation coefficient are larger.
【作者单位】：苏州科技大学江苏省结构工程重点实验室;北京建工土木工程有限公司苏州分公司;
【基金】：国家自然科学基金项目(51578355) 江苏省自然科学基金项目(BK20151200)
【分类号】：TU391

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