不同种类螺栓的不锈钢端板连接节点抗震性能试验研究

发布时间：2018-02-21 03:00

本文关键词： 不锈钢结构端板螺栓连接拟静力试验抗震性能有限元分析(FEM)　出处：《天津大学学报(自然科学与工程技术版)》2017年S1期 　论文类型：期刊论文

【摘要】：端板连接是门式钢架和多层钢框架中常用的节点形式,而目前少有针对不锈钢结构端板连接节点的相关研究.本文对4种类型的螺栓(镀锌高强度螺栓10.9级、8.8级,奥氏体不锈钢螺栓A4-70、A4-80)和不同端板厚度的不锈钢结构外伸式端板连接节点进行循环荷载下的破坏试验,研究其节点破坏形态、承载力及延性,并与有限元计算结果进行对比.试验结果表明:不锈钢螺栓端板连接节点的滞回曲线呈Z形,且其耗能系数仅为镀锌高强度螺栓端板节点的40%,;当端板较薄时,节点的抗震性能均有显著提高;通过有限元分析与试验结果的比较,验证了有限元模型的正确性.研究结果表明,所有试件的滞回曲线均具有不同程度的滑移捏缩现象,不锈钢螺栓端板连接节点、端板越薄时捏缩现象越明显,因此需从设计上加以改进,同时不锈钢摩擦面的处理工艺也需进一步开发,以提高不锈钢面的抗滑移系数.
[Abstract]:End-plate connection is a common joint form in gate steel frame and multi-layer steel frame, but there is little research on end-plate connection joint of stainless steel structure at present. In this paper, four kinds of bolts (galvanized high strength bolt 10.9 grade 8.8) are studied in this paper. Austenitic stainless steel bolt A4-70 A4-80) and the extension end-plate connections of stainless steel structure with different thickness were tested under cyclic load. The failure mode, bearing capacity and ductility of the joints were studied. The results show that the hysteretic curve of the end plate joint of stainless steel bolt is Z shape, and its energy dissipation coefficient is only 40% of that of galvanized high strength bolt end plate, and when the end plate is thin, The seismic behavior of joints has been improved significantly, and the correctness of the finite element model has been verified by comparing the finite element analysis with the experimental results. The results show that the hysteretic curves of all specimens have different degree of slip pinch phenomenon. The phenomenon of pinch is more obvious when the end plate is thinner, so it needs to be improved in design, and the treatment technology of stainless steel friction surface also needs to be further developed in order to improve the slip coefficient of stainless steel face.
【作者单位】：土木工程安全与耐久教育部重点实验室清华大学土木工程系;沈阳建筑大学土木工程学院;天津大学建筑工程学院;江苏东阁不锈钢制品有限公司;
【基金】：国家自然科学基金资助项目(51108007) 清华大学自主科研计划课题(学科交叉专项)资助项目(20131089288)
【分类号】：TU352.11;TU391

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