铁道标准设计2018，Vol.62Issue(5)：57-62,6.DOI:10.13238/j.issn.1004-2954.201709130002
转体施工的铁路曲线连续槽形梁设计关键技术研究
Research on Key Technologies of Railway Curved Continuous U-Shaped Beam Design for Rotation Construction
杨克鉴 1鲁昭 1周津斌1
作者信息
- 1. 中铁第六勘察设计院集团有限公司,天津 300308
- 折叠
摘要
Abstract
In order to ensure structural safety and reliability in the rotation construction of curved continuous U-shaped beam, the following key technical issues need to be solved: the lateral force of structure,the bid sunshine temperature difference stress, the lateral position of the support center line, the lateral eccentric load of the curved rotation structure, and the structural stress calculation of curved continuous U-shaped beam. Transverse pre-stressing tendons in the ballast channel plate are properly arranged to overcome the principal tensile stress at the transverse joint; the thickness of the protective layer of the side main beam roof is increased and longitudinal pre-stressing tendons are properly arranged to control sunshine temperature difference stress. Transverse secondary stress is avoided by properly arranged lateral support position. The spherical joint center is set up with lateral eccentricity relative to the upper and lower cushion caps and the problem of beam inclination caused by unbalance of lateral dead weight during rotation is thus solved. Plane model, single beam model, grillage model and solid model are established to conduct comparative stress analysis of curved space structures. The results show that the tress of curved continuous U-shaped beam meets the code.关键词
连续梁/槽形梁/横向预应力束/日照温差/合理支撑位置/弯剪扭构件Key words
Continuous beam/U-Shaped beam/Transverse pre-stressing tendons/Sunshine temperature difference/Reasonable lateral support position/Bending-shear-torsion components分类
交通工程引用本文复制引用
杨克鉴,鲁昭,周津斌..转体施工的铁路曲线连续槽形梁设计关键技术研究[J].铁道标准设计,2018,62(5):57-62,6.
