新型PEC柱-钢梁中节点摩擦耗能型部分自复位连接抗震性能试验研究

发布时间：2018-05-27 16:24

本文选题：新型PEC柱 + 部分自复位连接　；参考：《土木工程学报》2016年04期

【摘要】：为研究摩擦耗能T形连接件部分自复位连接的抗震性能,考虑PEC柱布置方式,按1∶1.6缩尺比例设计制作2个新型PEC柱-钢梁中节点试件模型,并进行水平低周往复荷载试验。基于试验测试数据整理,对试件的滞回性能、承载能力、耗能能力、自复位功效和节点传力机理等进行分析。结果表明:摩擦耗能T形连接件部分自复位连接通过预拉杆和摩擦耗能T形连接件有效实现了"自复位功效与耗能能力有机统一"的性态设计目标;PEC柱布置方式决定其受力性能,且改变了节点梁柱刚度匹配,从而影响到连接形式受力性能的发展进程和试件损伤分布规律;对穿螺栓和预拉杆实现了节点域混凝土斜压带传力模式,相应降低了节点域腹板的抗剪性能要求;所有试件层间侧移角达到中震层间侧移角限值0.02rad之前,节点与连接基本无残余转角,而当层间侧移角超过大震层间侧移角限值0.035rad时,试件承载能力仍呈增大趋势、且对应节点与连接残余转角不超过0.01rad,即该连接形式具有良好的自复位功效和抗倒塌性能。
[Abstract]:In order to study the seismic behavior of partially reset joints of friction energy-dissipation T-joints, considering the arrangement of PEC columns, two new model specimens of PEC column-steel beams were designed and fabricated according to the scale of 1: 1.6 scale, and the horizontal low-cycle reciprocating load tests were carried out. Based on the test data, the hysteretic performance, load-carrying capacity, energy dissipation ability, self-reset effect and the mechanism of node force transfer of the specimen are analyzed. The results show that the partial self-reset connection of friction energy dissipation T-joint can effectively realize the "organic unity of self-reset effect and energy dissipation ability" through pre-tension rod and friction energy-dissipation T-joint. Determine its mechanical properties, The Liang Zhu stiffness matching of the joints is changed, which affects the development process of the mechanical properties of the joints and the damage distribution of the specimens, and realizes the load transfer mode of the concrete baroclinic band in the joint domain for the bolt and the pretension bar. The shear performance requirements of the web in the joint domain are reduced accordingly. Before the lateral displacement angle of all the specimens reached the mid-earthquake interlayer lateral shift angle limit 0.02rad, there is basically no residual angle between the node and the connection, but when the interlayer lateral displacement angle exceeds the 0.035rad, the interlaminar lateral displacement angle is higher than the seismic interlayer lateral displacement angle limit 0.035rad. The load-bearing capacity of the specimen is still increasing, and the angle between the corresponding node and the residual joint is less than 0.01rad. that is to say, the joint has good self-reset effect and anti-collapse performance.
【作者单位】：苏州科技学院江苏省结构重点实验室;苏州中固建筑科技有限公司;
【基金】：国家自然科学基金(51478286,51078247) 江苏省自然科学基金(BK2009558) 国家住房与城乡建设部科研项目(2009-K2-23) 江苏省“青蓝工程”中青年学术带头人资助(2014) 江苏省高校首批优秀中青年教师出国研修计划(2011)
【分类号】：TU398.9;TU352.11

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