王渠, 吴庆雄, 陈宝春. 装配式空心板桥铰缝破坏模式试验研究[J]. 工程力学, 2014, 31(增刊): 115-120. DOI: 10.6052/j.issn.1000-4750.2013.04.S025
引用本文: 王渠, 吴庆雄, 陈宝春. 装配式空心板桥铰缝破坏模式试验研究[J]. 工程力学, 2014, 31(增刊): 115-120. DOI: 10.6052/j.issn.1000-4750.2013.04.S025
WANG Qu, WU Qing-xiong, CHEN Bao-chun. EXPERIMENTAL STUDY ON FAILURE MODE OF HINGED JOINT IN ASSEMBLY VOIDED SLAB BRIDGE[J]. Engineering Mechanics, 2014, 31(增刊): 115-120. DOI: 10.6052/j.issn.1000-4750.2013.04.S025
Citation: WANG Qu, WU Qing-xiong, CHEN Bao-chun. EXPERIMENTAL STUDY ON FAILURE MODE OF HINGED JOINT IN ASSEMBLY VOIDED SLAB BRIDGE[J]. Engineering Mechanics, 2014, 31(增刊): 115-120. DOI: 10.6052/j.issn.1000-4750.2013.04.S025

装配式空心板桥铰缝破坏模式试验研究

EXPERIMENTAL STUDY ON FAILURE MODE OF HINGED JOINT IN ASSEMBLY VOIDED SLAB BRIDGE

  • 摘要: 以带深铰缝构造的装配式空心板桥为研究对象,设计并制作了一跨8m足尺模型,开展了车辆荷载作用下铰缝构造的破坏类型、破坏位置、开裂荷载等破坏模式的试验研究。试验结果表明:中载作用下试验梁铰缝破坏过程为在弯拉应力作用下沿空心板与铰缝的结合面底部向上开裂,最后形成通缝。结合面开裂荷载约70kN,即1.0倍设计车辆荷载;贯通至铰缝顶部形成通缝的荷载约140kN,即2.0倍设计车辆荷载。建议采用一些构造措施延缓结合面形成通缝,以保证铰缝的受力状态与空心板一致或接近。

     

    Abstract: Based on assembly voided slab bridges with hinged joints, a full-scale model of an assembly voided slab bridge with the span of 8m is designed and made. The failure modes of a hinged joint under vehicle loads are discussed, such as the failure type, failure position and cracking load. The results show that the bottom of the hinged joint cracks along the interface between a voided slab and a hinged joint subjected to the action of bending tensile stress under a middle load. The cracking load is 70kN (1.0 times of a vehicle load), and the crack extend to the top of an interface at 140kN (2.0 times of a vehicle load). In order to ensure the mechanical behaviors of a hinged joint to be consistent with or close to that of a voided slab, some construction measures are suggested to delay the crack of the interface between a voided slab and a hinged joint extending from the bottom to the top of a slab.

     

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