混凝土柱-钢梁混合结构栓接节点的抗震性能试验研究

发布时间：2018-01-18 08:03

本文关键词：混凝土柱-钢梁混合结构栓接节点的抗震性能试验研究　出处：《应用基础与工程科学学报》2016年04期 　论文类型：期刊论文

【摘要】：为了研究全装配式混凝土柱-钢梁混合结构节点的抗震性能,提出了3种不同的干作业螺栓连接混合节点.通过拟静力试验,分别对节点组合件的破坏特征、破坏机理以及承载能力、延性和耗能能力等抗震性能进行了试验研究.研究结果表明,结合钢结构削弱外伸梁端节点的理念,将塑性铰从梁端外移到削弱处,能避免塑性铰对核心区的不利影响,实现强柱弱梁的抗震设计要求;采用提出的新型钢构套构造,试件节点核心区具有较高的承载能力和刚度;盖板拼接节点的滞回曲线呈Z字型,反映出存在较大滑移的影响;外伸端板的半刚性连接节点,其滞回曲线呈纺锤形,等效黏滞阻尼系数较大,端板屈曲能较好地耗散能量;盖板内侧设置摩擦铜片后,等效黏滞阻尼系数明显增大,利用摩擦机制能起到较好的耗能效果;试件的损伤集中在钢梁连接部位,通过合理设计,能实现震后破损构件的修复和替换.
[Abstract]:In order to study the seismic behavior of the composite joints of fully assembled concrete column-steel beams, three different kinds of dry-working bolted joints were proposed. The failure characteristics of the joints were analyzed by pseudo-static test. The failure mechanism, bearing capacity, ductility and energy dissipation capacity are tested and studied. The results show that the plastic hinge is moved from the end of the beam to the weakening place in combination with the idea that the steel structure weakens the joints at the end of the beam. It can avoid the adverse effect of plastic hinge on the core area and meet the seismic design requirements of strong column and weak beam. Using the new steel structure, the core zone of the joint has higher bearing capacity and stiffness. The hysteretic curve of cover plate joint is Z shape, which reflects the influence of slip. The hysteretic curve of the semi-rigid joint of the extended end-plate is spindle-shaped, the equivalent viscous damping coefficient is large, and the end-plate buckling can dissipate energy well. The equivalent viscous damping coefficient increases obviously after the friction copper sheet is set on the inner side of the cover plate, and the friction mechanism can play a better energy dissipation effect. The damage of the specimen is concentrated in the connection of steel beam. Through reasonable design, the damaged members can be repaired and replaced after the earthquake.
【作者单位】：江苏科技大学土木工程与建筑学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家自然科学基金(51278104) 湖南省自然科学基金(11JJ5024) 中铁集团科研项目江苏省研究生科研创新计划(SJLX15_0533) 江苏科技大学研究生创新计划(YCX15S-22)
【分类号】：TU352.11;TU398.9
【正文快照】： 随着劳动力资源日益昂贵并趋于紧张,目前施工现场人海战术的施工方式今后将难以为继;从环境角度考虑,施工周期长、环境噪声污染大的现场浇筑施工方法将会逐步淘汰.建筑产业现代化的发展方兴未艾,新的发展机遇下,新型预制装配式结构成为结构体系发展的一个重要方向[1-5].混凝土

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