钢筋混凝土柱-腹板贯通型钢梁混合框架中节点抗震性能试验研究

发布时间：2019-01-12 16:10

【摘要】：提出了用于混合框架的钢梁腹板贯通、翼缘部分切除的钢梁-钢筋混凝土柱(RCS)中节点构造形式。通过对节点试件的低周往复加载试验,研究了6种不同构造措施下节点试件的破坏过程、破坏形态和抗震性能。分析了该类混合节点试件的承载力、变形能力、滞回曲线、骨架曲线、强度退化、刚度退化和耗能特性等。结果表明,该6个节点试件的破坏形态可分为两类:一类为柱端混凝土和节点区内部混凝土的局压破坏;另一类为节点核心区的剪切破坏。局压破坏的试件滞回曲线呈弓形,且曲线下降段较陡,而剪切破坏的试件滞回曲线呈反S形,曲线下降段较缓。局压破坏的试件承载力退化大,刚度退化较快。研究表明,所提出的混合节点具有良好的抗震性能,合理的节点构造措施可增强内外混凝土的共同工作性能,从而提高节点的受剪承载力和变形能力。
[Abstract]:The joint structure of steel beam-reinforced concrete column (RCS) with steel beam web through and partial flange removal is proposed. In this paper, the failure process, failure pattern and seismic behavior of the joint specimens under six different structural measures are studied by low-cycle reciprocating loading test. The bearing capacity, deformability, hysteretic curve, skeleton curve, strength degradation, stiffness degradation and energy dissipation characteristics of the specimens are analyzed. The results show that the failure patterns of the six joints can be divided into two categories: one is the local compression failure of the column end concrete and the concrete inside the joint zone, and the other is the shear failure in the core zone of the joint. The hysteretic curve of the specimen under local pressure failure is arched, and the descending section of the curve is steeper, while the hysteretic curve of the shear failure specimen is reverse S shape, and the descending section of the curve is slower. The bearing capacity of the specimens destroyed by local pressure is large and the stiffness degradation is faster. The results show that the proposed hybrid joints have good seismic performance and reasonable joint construction measures can enhance the joint working performance of internal and external concrete and thus improve the shear capacity and deformation capacity of the joints.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51008244) 陕西省自然科学基础研究计划项目(2014JQ7245,2014KJXX-67) 陕西省教育厅专项科研基金(2013JK0982)
【分类号】：TU375.3

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