采动下沉盆地压缩区斜交框架桥受力性能
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TD 22

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河南省科技攻关项目(202102310547)


Study on mechanical performance of skew frame bridge in compression area of mining subsidence basin
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    摘要:

    为了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,本文采用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并得到如下结论:(1)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;(2)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;(3)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。

    Abstract:

    In order to reveal the influence of earth pressure on the mechanical performance of orthogonal frame bridge and skew frame bridge in subsidence basin of mining area, the displacement and mechanical response of orthogonal frame bridge and skew frame bridge under different earth pressure conditions are studied by using ANSYS. The following conclusions are obtained: (1) the maximum horizontal displacement of orthogonal frame bridge and skew frame bridge under earth pressure is obtained In the middle area of the side wall of the frame bridge, the maximum vertical displacement is in the middle area of the roof of the frame bridge; the maximum Mises stress is at the junction of the side wall and the bottom plate of the frame bridge; (2) when the earth pressure increases from the static earth pressure to the limit passive earth pressure, the area where the absolute value of the above parameters appears remains unchanged, and the value increases continuously; (3) when the earth pressure working conditions are the same, the slope angle is increased The absolute values of displacement and stress extremum of cross frame bridge are slightly larger than those of orthogonal frame bridge.

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窦国涛,夏军武,于文杰. 采动下沉盆地压缩区斜交框架桥受力性能[J]. 科学技术与工程, 2021, 21(12): 5084-5091.
Dou Guotao, Xia Junwu, Yu Wenjie. Study on mechanical performance of skew frame bridge in compression area of mining subsidence basin[J]. Science Technology and Engineering,2021,21(12):5084-5091.

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  • 收稿日期:2020-10-07
  • 最后修改日期:2021-04-25
  • 录用日期:2020-12-21
  • 在线发布日期: 2021-05-17
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