抗冲切钢筋对板柱中节点抗震性能的影响
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TU375.2

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国家自然科学基金(51338004、51178175)


Effect of shear reinforcement on seismic performance of interior slab-column connections
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    摘要:

    为研究抗冲切钢筋和暗梁对板柱节点抗震性能的影响,进行了5个低周往复荷载作用下的板柱节点试验,其中,1个试件无抗冲切钢筋,另外4个试件分别配置螺旋箍筋、四肢箍筋、八肢箍筋和栓钉。对各试件的裂缝发展特征、破坏形态、滞回性能、不平衡弯矩承载力和延性性能等进行了分析。试验结果表明:配置抗冲切钢筋试件的不平衡弯矩承载力和延性性能较无抗冲切钢筋试件分别提高13%~48%和68%~198%;合理设计暗梁能明显提高试件的整体抗震性能,配置四肢箍筋的试件能满足中国规范的抗震性能需求,且较采用八肢箍筋的试件更经济。总结和分析已有试验数据发现,中国规范对于配置抗冲切钢筋板柱节点的计算结果与试验结果整体较吻合,但离散度偏高。

    Abstract:

    To study the effect of shear reinforcement and installation of concealed beam on seismic behavior of slab-column connections, five slab-column connections were tested under low-cycle reversed load. The control specimen had no shear reinforcement, while the other four specimens were equipped with spiral stirrups, four-leg stirrups, eight-leg stirrups and studs, respectively. Crack development characteristics, failure modes, hysteretic behaviour, unbalanced moment capacity and ductility of each specimen were analyzed. The results show that compared with the specimen without shear reinforcement, unbalanced moment capacity and ductility of specimens with shear reinforcement are increased by 13%~48% and 68%~198%, respectively. The general seismic performance of specimens is significantly improved by properly designing the concealed beam. The specimen with four-leg stirrups can meet the requirement of seismic performance in Chinese code and is more economical than the that with eight-leg stirrups. By summarizing and analyzing existing test data, it is found that for slab-column connections with shear reinforcement, the calculated results with Chinese code are in good agreement with test results, but the dispersion of calculated results is relatively high.

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唐明,易伟建,吴越凡,刘力维.抗冲切钢筋对板柱中节点抗震性能的影响[J].土木与环境工程学报(中英文),2020,42(3):54-63.

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  • 收稿日期:2019-06-17
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  • 在线发布日期: 2020-06-13
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