汽车荷载作用下空心板桥空间动力冲击效应

发布时间：2018-07-03 05:49

本文选题：空心板桥 + 横向连接　；参考：《北京交通大学学报》2014年01期

【摘要】：根据空心板桥结构特点,运用梁壳组合模型和铰接梁模型模拟空心板桥,考虑桥面不平顺影响,建立三维车桥耦合振动模型分析空心板桥动力特性,研究不同车速、行车道位置及路面状况对空心板桥冲击系数的影响,并将理论值与实测值进行对比.研究结果表明:空心板桥动力特性梁壳组合模型与实测值更接近;车速在12~16 m/s时,空心板桥位移冲击系数随速度有明显共振节拍,随着路面不平顺恶化,速度节拍影响不明显;位移冲击系数与应变冲击系数并不完全一致,跨中位移冲击系数略大于应变冲击系数,1/4位置应变冲击系数略大于位移冲击系数;实测与数值模拟的空心板桥冲击系数均满足现行规范要求.
[Abstract]:According to the structural characteristics of hollow slab bridge, the combined beam-shell model and articulated beam model are used to simulate the hollow slab bridge. Considering the influence of bridge deck irregularity, a three-dimensional vehicle-bridge coupling vibration model is established to analyze the dynamic characteristics of hollow slab bridge. The impact coefficient of hollow slab bridge is influenced by the location of carriageway and the road condition, and the theoretical value is compared with the measured value. The results show that the combined beam-shell model of the dynamic characteristics of hollow slab bridge is closer to the measured value, and the displacement impact coefficient of hollow slab bridge has obvious resonance beat with the velocity at 12 ~ 16 m / s, but the influence of velocity beat is not obvious with the deterioration of road surface irregularity. The displacement impact coefficient is not completely consistent with the strain impact coefficient, and the displacement impact coefficient is slightly larger than the strain impact coefficient by 1 / 4 of the strain impact coefficient. The measured and simulated impact coefficients of hollow slab bridges meet the requirements of current codes.
【作者单位】：东南大学交通学院;华东交通大学土木建筑学院;
【基金】：国家自然科学基金资助项目(51268013) 江西省自然科学基金资助项目(20114BAB216008) 教育部工程研究中心资助项目(13TM02)
【分类号】：U441.3

【参考文献】