装配式钢管混凝土柱-盖梁节点抗震性能试验研究

发布时间：2018-02-04 13:02

本文关键词： 钢管混凝土结构装配式节点低周反复荷载试验抗震行为　出处：《土木工程学报》2017年08期 　论文类型：期刊论文

【摘要】：装配式钢管混凝土柱-盖梁节点施工简单、工期短,逐渐在桥梁建设中广泛运用。提出一种带抗剪环的新型钢管混凝土柱-盖梁节点,介绍装配式节点在桥梁施工中的施工工序。设计7个钢管直径超过508mm的大规模节点试件,通过低周反复荷载试验对6个抗剪环节点和1个钢筋笼节点进行了地震响应分析。对比分析节点的破坏形态、有效刚度、延性、滞回性能和极限承载能力等力学特性,得到如下结论:钢管混凝土柱出现初始撕裂时的位移随着构件的有效刚度增大而增大,盖梁的开裂情况则随着钢管混凝土柱埋深的增加而减少。埋深相近的情况下,抗剪环节点的极限荷载承载力大于钢筋笼节点;抗剪环节点的整体延性随着径厚比D/t的增大而减小。
[Abstract]:The prefabricated concrete-filled steel tubular column-capping beam joint is widely used in bridge construction because of its simple construction and short construction period. A new type of concrete-filled steel tubular column-capping beam joint with shear ring is proposed. This paper introduces the construction procedure of prefabricated joints in bridge construction, and designs 7 large scale joint specimens with diameter of steel pipe exceeding 508mm. The seismic response of 6 shear link points and 1 reinforced cage joint was analyzed by low cycle repeated load test. The failure patterns, effective stiffness and ductility of the joints were compared and analyzed. The results show that the displacement of concrete filled steel tubular columns increases with the increase of effective stiffness when initial tearing occurs. The cracking of the cover beam decreases with the increase of the buried depth of the CFST column. When the buried depth is similar, the ultimate load bearing capacity of the shear link is greater than that of the reinforced cage joint. The overall ductility of the shear link decreases with the increase of D / t ratio of diameter to thickness.
【作者单位】：武汉理工大学;华盛顿大学;
【基金】：国家自然科学基金(51408450)
【分类号】：TU352.11;TU398.9
【正文快照】： 引言钢管混凝土柱作为桥墩在桥梁建设中的运用逐渐广泛,目前最为著名的属于“亚洲第一高墩”腊八斤沟特大桥,其最高墩绝对高度超过182.5m,为混凝土外包钢管混凝土组合结构。主墩采用节段拼装施工,节段外观为矩形截面,实质为矩形四角各安装直径1m,高12m的钢管柱,钢管与钢管间采

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