采动下沉盆地压缩区斜交框架桥受力性能  

Mechanical Performance of Skew Frame Bridge in Compression Area of the Mining Subsidence Basin

作　　者：窦国涛 夏军武[2,3] 于文杰[1] DOU Guo-tao;XIA Jun-wu;YU Wen-jie(School of Civil Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,China University of Mining&Technology,Xuzhou 221008,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]郑州航空工业管理学院土木建筑学院,郑州450046 [2]中国矿业大学,江苏省土木工程环境灾变与结构可靠性重点实验室,徐州221008 [3]中国矿业大学力学与土木工程学院,徐州221116

出　　处：《科学技术与工程》2021年第12期5084-5091,共8页Science Technology and Engineering

基　　金：河南省科技攻关项目(202102310547);国家自然科学基金青年科学基金(41902266);江苏省土木工程环境灾变与结构可靠性重点实验室开放基金(JSKL2018YB04)。

摘　　要：为揭示采动区下沉盆地压缩区土压力对正交框架桥和斜交框架桥的受力性能的影响,采用ANSYS进行建模,研究了不同土压力工况下正交框架桥和斜交框架桥的位移及力学响应。结果表明:正交框架桥和斜交框架桥在土压力作用下,水平向位移最大值在框架桥侧墙中部区域,竖向位移最大值在框架桥顶板中间区域,最大米塞斯应力值在框架桥侧墙和底板交界处区域;当土压力从静止土压力增大到极限被动土压力过程中,以上参数极值绝对值出现的区域不变,数值不断增大;当土压力工况相同时,斜交框架桥位移和应力极值绝对值稍大于正交框架桥。In this study,different earth pressure conditions were applied on the orthogonal frame bridge and skew frame bridge by ANSYS.It was to elucidate their displacement and mechanical performances in compression area of the mining subsidence basin.The following results are got from the research.The maximum horizontal displacement is observed in the middle area of the side wall of both types of bridges,the maximum vertical displacement is seen in the middle area of the roof of both types of bridges,and the maximum Mises stress is observed at the junction between the side wall and the bottom plate of both types of bridges.When the earth pressure increases from the static earth pressure to the ultimate passive earth pressure,all above parameters(i.e.maximum horizontal displacement,maximum vertical displacement,and maximum Mises stress)still occur in the same areas,and their absolute values increase continuously.In general,the skew frame bridge has slightly larger maximum horizontal displacement,maximum vertical displacement,and maximum Mises stress than the orthogonal frame bridge under the same earth pressure.

关 键 词：采动区 下沉盆地 压缩区 土压力 框架桥 

分 类 号：U411.2TD22[交通运输工程—道路与铁道工程]