装配式空心板桥铰缝破坏模式有限元分析

发布时间：2018-04-30 00:38

本文选题：桥梁工程 + 装配式空心板桥　；参考：《工程力学》2014年S1期

【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]:Taking the fabricated hollow slab bridge with deep hinged joints as the research object, a solid model of an 8 m span assembly hollow slab bridge is established by using the general program ANSYS. In this paper, the failure types, failure locations and cracking load modes of hinged joints are discussed under the action of vehicle loads at different positions (medium load and eccentric load). The results show that, regardless of the loading mode, the first failure is the hinge structure, and the failure position under mid-load is at the joint plane between the hinge joint and the hollow slab. The failure type is flexural failure, and the load is 62kN(0.88 times the vehicle load. When the load is 133kN(1.90 times the vehicle load), the crack passes through to the top of the joint plane to form the joint; under the eccentric load, the failure position is inside the hinge joint, the failure type is shear failure, and the load is 72kN(1.03 times the vehicle load), when the joint top cracks, the crack at the top of the hinge joint is cracked. When the load is 238kN(3.40 times the vehicle load) the crack passes through to the bottom of the hinge joint. Through the comparison of the two loading modes, it can be seen that the medium load is more disadvantageous to the hinge joint construction of the assembled hollow slab bridge.
【作者单位】：福州大学土木工程学院;
【基金】：福建省自然科学基金(杰青)项目(2012J06013) 河北省交通运输厅2011年度科技计划项目(Y-2011023)
【分类号】：U445.7

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