再生混凝土框架梁柱中间节点试验研究
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国家自然科学基金(00881913003);北京市属高等学校创新团队建设与教师职业发展项目


Experimental research of interior recycled concretebeam-column joints
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    摘要:

    对6个再生混凝土框架梁柱中间节点足尺构件进行低周反复荷载试验,研究低轴压比条件下再生混凝土节点区的粘结锚固性能。通过改变穿越节点核心区的梁纵筋直径、强度来研究再生混凝土节点的最小相对锚固长度,同时研究新的构造措施对节点粘结锚固性能及核心区抗剪能力的影响。结果发现在低轴压比条件下,按照普通混凝土规范设计的再生混凝土框架梁柱中间节点发生粘结滑移破坏,减小梁纵筋直径或在贯穿节点区的梁纵筋上焊接横向锚固钢筋均可以提高节点区的粘结锚固性能。再生混凝土节点抗剪承载力应在普通混凝土节点计算公式的基础上进行折减。

    Abstract:

    Six full-scale recycled concrete interior joints under cyclicloading to study the bond and anchorage property with low axial load ratios.The diameter, strength of the longitudinal bar across the core of the joint is different, aiming to find out the minimum relative anchorage length in recycled concrete joint. Besides, the effect of the new anchorage method of the bar to bond property and shear resisting property is still studied. The results shows that with low axial load ratios, bond and anchorage failure will occur in the recycled concrete joints designed by recent codes. Using barsof small diameter and welding transverse reinforcement on the beam longitudinal reinforcement in joint zone will improve anchorage performance.The shear bearing capacity of the recycled concrete joints should be reduced by the calculation formula of common concrete joints.

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许允志,彭有开,吴徽.再生混凝土框架梁柱中间节点试验研究[J].土木与环境工程学报(中英文),2015,37(Z2):6-11. Xu Yunzhi, Peng Youkai, Wu Hui. Experimental research of interior recycled concretebeam-column joints[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2015,37(Z2):6-11.[doi]

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  • 收稿日期:2015-11-10
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  • 在线发布日期: 2016-03-14
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