陈悦驰, 吴庆雄, 陈宝春. 装配式空心板桥铰缝破坏模式有限元分析[J]. 工程力学, 2014, 31(增刊): 51-58. DOI: 10.6052/j.issn.1000-4750.2013.04.S024
引用本文: 陈悦驰, 吴庆雄, 陈宝春. 装配式空心板桥铰缝破坏模式有限元分析[J]. 工程力学, 2014, 31(增刊): 51-58. DOI: 10.6052/j.issn.1000-4750.2013.04.S024
CHEN Yue-chi, WU Qing-xiong, CHEN Bao-chun. FAILURE MODE OF HINGED JOINT IN ASSEMBLY VOIDED SLAB BRIDGE BY FINITE ELEMENT ANALYSIS[J]. Engineering Mechanics, 2014, 31(增刊): 51-58. DOI: 10.6052/j.issn.1000-4750.2013.04.S024
Citation: CHEN Yue-chi, WU Qing-xiong, CHEN Bao-chun. FAILURE MODE OF HINGED JOINT IN ASSEMBLY VOIDED SLAB BRIDGE BY FINITE ELEMENT ANALYSIS[J]. Engineering Mechanics, 2014, 31(增刊): 51-58. DOI: 10.6052/j.issn.1000-4750.2013.04.S024

装配式空心板桥铰缝破坏模式有限元分析

FAILURE MODE OF HINGED JOINT IN ASSEMBLY VOIDED SLAB BRIDGE BY FINITE ELEMENT ANALYSIS

  • 摘要: 以带有深铰缝构造的装配式空心板桥为研究对象,采用通用程序ANSYS建立了一跨8m的装配式空心板桥实体模型,讨论了车辆荷载在不同位置(中载和偏载)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。结果表明:不管是哪种加载方式,首先破坏的是铰缝构造;中载作用下破坏位置在铰缝与空心板的结合面处,破坏类型为受弯破坏,荷载为62kN(0.88倍车辆荷载)时结合面底部开裂,荷载为133kN(1.90倍车辆荷载)时裂缝贯通至结合面顶部形成通缝;偏载作用下破坏位置在铰缝内部,破坏类型为受剪破坏,荷载为72kN(1.03倍车辆荷载)时铰缝顶部开裂,荷载为238kN(3.40倍车辆荷载)时裂缝贯通至铰缝底部。通过对两种加载方式的比较可知,中载对装配式空心板桥铰缝构造更不利。

     

    Abstract: Based on an assembly voided slab-bridge with hinged joints, a solid model of an assembly voided slab-bridge with the span of 8m is established by general program ANSYS. The failure modes of a hinged joint under different places of application to a vehicle load (middle load and bias load) are studied, such as the failure type, failure position and cracking load. The results show that: whatever the load mode is, a hinged joint is destroyed earlier than a voided slab. Under the middle load, failure position is the interface between a voided slab and a hinged joint, and the failure type is bending failure. The cracking load at the bottom of the interface between a voided slab and a hinged joint is 62kN (0.88 times of a vehicle load), and the crack extend to the top of an interface at 133kN (1.90 times of a vehicle load). Under a bias load, the failure position is inside a hinged joint, and the failure type is shearing failure. The cracking load at top of a hinged joint is 72kN (1.03 times of a vehicle load), and the crack will extend to the bottom of a hinged joint at 238kN (3.40 times of a vehicle load). According to the comparison of two different load modes, the middle load is more disadvantageous for the hinged joint of an assembly voided slab bridge.

     

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