| 潘秀珍*,郭子龙,赵登云,冯有伟,田建勃.用于RC框架-轻钢增层混合结构的新型外箍式节点抗震性能试验研究[J].实验力学,2020,35(2):327~337 |
| 用于RC框架-轻钢增层混合结构的新型外箍式节点抗震性能试验研究 |
| Experimental study on seismic behavior of new type outer hoop joint for RC frame-light steel mixed structure |
| 投稿时间：2018-08-21 修订日期：2018-11-24 |
| DOI：10.7520/1001-4888-18-192 |
| 中文关键词: RC框架-轻钢增层混合结构 外箍式节点 耗能能力 抗震性能 |
| 英文关键词:RC frame-light steel mixed structure outer hoop joint energy dissipation capability seismic behavior |
| 基金项目:国家自然科学基金(51608441)资助；中国博士后科学基金面上项目(2017M613174)资助；陕西省自然科学基础研究计划项目(2017JQ5032)资助；陕西省高校科协青年人才托举计划项目(20170513)资助 |
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| 中文摘要: |
| RC框架-轻钢增层混合结构是一种上轻下重、刚度突变明显的复杂结构，为了保证结构整体协同工作，本文提出了一种能够有效减缓刚度突变和增强对上部结构约束的新型外箍式连接节点。通过对新型外箍式节点与传统植筋节点的1∶2缩尺模型拟静力试验研究，得到了试件破坏模式和荷载-位移滞回曲线，对比分析了其滞回特性、梁端塑性铰、骨架曲线、强度退化、刚度退化和耗能能力等抗震性能。结果表明：新型外箍式节点可以使梁端塑性铰远离梁根部，有效保护了节点核心区；新型节点通过外箍钢板的构造措施提高了试件的初始刚度、承载力和耗能能力，减缓了刚度与强度退化速度，表明新型节点的抗震性能大幅度优于传统植筋节点，研究成果可为RC框架-轻钢增层混合结构的节点设计提供一定参考。 |
| 英文摘要: |
| RC frame-light steel mixed structure is a complex structure with characteristics of upper light-lower weight and obvious sudden change in stiffness. In order to ensure the overall collaboration of the structure, a new type of outer hoop joint is proposed, which can effectively alleviate the sudden change in stiffness and enhance the restraint on the upper structure. Based on the quasi-static tests of the 1∶2 scale model of the new type of outer hoop joints and the traditional planted-bar joints, the failure modes and load-displacement hysteretic curves of the specimens are obtained. The hysteretic characteristics, plastic hinges at beam ends, skeleton curves, strength degradation, stiffness degradation and energy dissipation capacity of the specimens are compared and analyzed. The results show that the new type of outer hoop joint can make the plastic hinge at the end of the beam far away from the root of the beam and effectively protect the core area of the joint. The new type of joint improves the initial stiffness, bearing capacity and energy dissipation capacity of the specimens through the construction of the outer hoop steel plate, and slows down the degradation speed of stiffness and strength. It shows that the seismic performance of the new type of outer hoop joint is much better than that of the traditional planted-bar joints. The results will provide valuable guidance for the design of the RC frame-light steel mixed structure. |
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