高强轻骨料混凝土框架结构抗震性能试验研究

发布时间：2018-01-06 07:37

本文关键词：高强轻骨料混凝土框架结构抗震性能试验研究　出处：《建筑结构学报》2017年11期 　论文类型：期刊论文

【摘要】：以某高铁站房框架结构底部两层为研究对象,完成一榀缩尺比为1∶5的两层两跨高强轻骨料混凝土框架整体模型低周反复荷载试验,研究了框架受力过程、破坏机制与破坏形态、位移延性、滞回耗能特性以及刚度退化等。结果表明:按照JGJ 12—2006《轻骨料混凝土结构技术规程》设计的试验框架能够满足"强柱弱梁、强节点弱构件"的设计要求;破坏机制属混合破坏机制,即塑性铰首先在模型首层梁端出现,在首层梁端出现塑性铰后柱端出现塑性铰,试件以柱根部混凝土压溃、柱内纵筋压曲外露为破坏标志,节点核心区箍筋在试件受力全过程中一直处于弹性工作状态。框架整体及层间的滞回曲线均较为饱满,高强轻骨料混凝土框架具有较好的耗能能力。
[Abstract]:Taking the bottom two floors of the frame structure of a high-speed railway station building as the research object, a two-story two-story two-story high-strength lightweight aggregate concrete frame with a scale ratio of 1: 5 was tested under low cycle repeated loading, and the stress process of the frame was studied. Failure mechanism and failure form, displacement ductility. The results show that the test frame designed according to JGJ 12-2006 "Technical Specification for lightweight aggregate concrete structures" can meet the requirements of "strong columns and weak beams". The design requirement of strong joint and weak component; The failure mechanism is a mixed failure mechanism, that is, the plastic hinge appears at the end of the beam at the first floor of the model, the plastic hinge at the end of the column at the end of the beam, and the concrete at the root of the column collapses. The compressive buckling of longitudinal reinforcement in the column is the sign of failure, and the stirrups in the core zone of the joint have been in the elastic working state during the whole process of loading. The hysteretic curves of the whole frame and the interlayer are full. High strength lightweight aggregate concrete frame has better energy dissipation capacity.
【作者单位】：长安大学建筑工程学院;中铁第一勘察设计院集团有限公司;
【基金】：国家自然科学基金项目(51578072,51578077) 陕西省科技统筹创新工程计划项目(2015KTZDSF03-04) 陕西省自然科学基金项目(2016JM5070)
【分类号】：TU352.11;TU37
【正文快照】： 0引言高强轻骨料混凝土(high-strength lightweightaggregate concrete,HSLAC)具有轻质高强、耐久及耐火性能好、隔热保温性能良好、抗冻抗渗性能好等特点,是一种应用前景良好、经济效益显著的绿色建筑材料,已广泛应用于桥梁工程、高层建筑、海洋平台等[1-3]。但由于该类材料

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