摘要
为了研究空心板桥铰缝失效对荷载横向分布的影响,推导了空心板桥整体受力及铰缝失效的典型力学模型,阐明了铰缝失效时荷载横向重分布的一般规律,并采用ANSYS有限元分析了不同损伤位置和损伤程度铰缝对上部结构荷载横向分布及其效应的影响。结果表明,铰缝失效改变了空心板桥上部结构的整体受力性能,损伤程度越大,上部结构组合板或单板效应越明显;失效铰缝相邻空心板荷载横向分布系数相对变化较大,最大为1.44和0.6倍;由于失效铰缝一侧空心板承担荷载比例增大,另一侧减小,导致相邻空心板挠度差异较大而产生错位、内力状态差别明显,建议加强偏载侧空心板应力监测。
To study the influence of hollow slab bridge hinge joint failure on the load transverse distribution,this paper deduced the typical mechanical model of hollow slab bridge whole force and hinge joint failure,illustrated the general law of load transverse redistribution during the hinge joint failure. Using ANSYS finite element, it also analyzed the influence of hinge joint with different damage location, damage degree on the upper structure load transverse distribution and its effect.
出处
《山西交通科技》
2017年第5期64-69,共6页
Shanxi Science & Technology of Transportation
关键词
桥梁工程
空心板
铰缝
荷载横向分布
失效
bridge engineering
hollow slab
hinge joint
load transverse distribution
failure
