温度效应下三塔斜拉-自锚式悬索协作体系模型桥位移分析

文章编号:(201602-0030-04

温度效应下三塔斜拉-自锚式悬索协作体系模型桥位移分析

蔡军哲

(西安公路研究院,陕西 西安  710065

  要:为了研究温度效应下三塔斜拉-自锚式悬索协作体系桥的位移响应规律,以某在建桥梁为依托工程,制作了120比例缩尺试验模型,研究了桥梁体系整体均匀升降温、索梁温差、桥塔日照梯度温差和桥面日照梯度温差4种工况下桥梁结构的位移响应规律。结果表明,索梁温差对主梁位移影响最大,每1度温差约造成实桥桥面2mm的最大竖向变形。其次是桥面温度梯度、体系升降温和主塔温度梯度作用。

关键词:斜拉-自锚式悬索协作体系桥模型试验温度效应有限元

中图分类号U442          文献标识码A

Analysis of Displacement for the Cable-Stayed Self-Anchored Suspension Composed Model Bridge with Three Towers Based onTemperature Effect

CAI Jun-zhe

Xi’an Highway Research InstituteXi'an 710065China

AbstractTo study displacement response law under temperature effect for three tower cable-stayed - since the anchor cable cooperation system bridgea 1:20 scale test model was made to study the four kinds bridge structure displacement response rule based on a bridge under construction projectsuch as the bridge beam system overall uniform coolingthe temperature difference and sunshine temperature gradient, bridge tower bridge sunshine temperature gradient. The results showed that temperature had the greatest influence on displacement of main girder, about every 1 degree temperature difference caused the largest vertical deformation of real bridge deck 2 mm. Followed by the bridge deck lift moderate temperature gradientsystem main tower temperature gradient effect.

Key wordscable-stayed self-anchored suspension composed bridgemodel testtemperature actionsfinite element method