折线隔板贯通方钢管轻骨料混凝土柱-H形钢梁异型节点抗震性能试验研究

发布时间：2018-01-20 22:50

本文关键词： 隔板贯通异型节点方钢管轻骨料混凝土柱 H形钢梁折线加强低周往复加载试验承载力塑性转角　出处：《建筑结构学报》2015年12期 　论文类型：期刊论文

【摘要】：通过对折线加强隔板贯通方钢管轻骨料混凝土柱-H形钢梁异型节点和基本型异型节点试件进行低周往复加载试验,研究了隔板折线加强构造对节点破坏形态、承载力、塑性转角、滞回性能、骨架曲线、刚度退化和耗能等的影响。试验结果表明:基本型异型节点在刚度较大、几何尺寸变化较大的大截面梁翼缘对接焊缝侧边开裂,节点的塑性转角约为0.028 rad;隔板折线加强异型节点的主要破坏模式为隔板折线加强区形成塑性铰及延性拉断、梁腹板焊接孔开裂及梁翼缘对接焊缝断裂,其塑性转角可达0.034~0.057 rad,承载力和耗能能力较基本型异型节点分别提高16.5%~47.0%和21.2%~144.0%;隔板贯通方钢管轻骨料混凝土柱-H形钢梁异型节点中,大截面梁先于小截面梁破坏,柱壁板间焊缝未发生撕裂破坏,轻骨料混凝土未发生压碎、拉裂、剥离或滑移破坏,节点的抗震性能主要受钢梁和隔板间焊缝破坏(而非轻骨料混凝土)的影响。
[Abstract]:Through the low-cycle reciprocating loading test on the specimens of broken line strengthened partition through square steel tube light aggregate concrete column -H-shaped steel beam and basic shaped steel beam, the failure pattern of the joint was studied. The influence of bearing capacity, plastic rotation angle, hysteretic performance, skeleton curve, stiffness degradation and energy dissipation etc. The experimental results show that the stiffness of the basic shaped joints is large. The large section beam flange with large section flange cracked on the side of the butt weld and the plastic angle of the joint was about 0.028 rad. The main failure modes are plastic hinge and ductile tensile break in the strengthened zone of the break line, crack of the welded hole of the beam web and fracture of the butt weld of the flange of the beam. The plastic turning angle can reach 0.034 ~ 0.057 rad. the bearing capacity and energy dissipation capacity of the joints are increased by 16.57.0% and 21.2144.0R, respectively. In the special-shaped joints of light aggregate concrete column of square steel tube, the beam of large section is destroyed before the beam of small section, the welds between columns and panels are not torn, and the concrete of light aggregate is not crushed and cracked. The seismic behavior of joints is mainly affected by weld failure (not lightweight aggregate concrete) between steel beam and partition.
【作者单位】：宁波大学建筑工程与环境学院;
【基金】：浙江省公益性技术应用研究计划(2013C31058) 宁波市自然科学基金项目(2013A610192)
【分类号】：TU398.9
【正文快照】： 0引言与普通混凝土相比,轻骨料混凝土具有自质量轻、保温性能好等优点。方钢管轻骨料混凝土柱-H形钢梁框架结构,除具有方钢管普通混凝土柱-钢梁框架结构承载力高、塑性和韧性强、抗震性能和抗火性能好等优点外,还具有自振周期长的优势,有利于结构抗震和降低工程造价。当框架各

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