特殊环境下温度效应对某中承式钢管混凝土拱桥的影响分析  

Analysis of the Temperature Effects on a Half-Through Concrete-Filled Steel Tube Arch Bridge Under Special Environment

作　　者：张庆 ZHANG Qing(China Railway 17th Bureau Group 5th Engineering Co.Ltd.,Taiyuan Shanxi 030032,China)

机构地区：[1]中铁十七局集团第五工程有限公司,山西太原030032

出　　处：《铁道建筑技术》2025年第3期71-74,138,共5页Railway Construction Technology

基　　金：中铁十七局集团有限公司科技研究开发计划项目(2022-B19)。

摘　　要：以北方某中承式钢管混凝土拱桥项目为背景,通过采集典型环境温度数据并结合有限元分析,研究了环境温度变化及拱肋梯度温度变化对结构受力及稳定性的影响。研究得出:均匀温度变化对结构的影响较小,而梯度温度的影响效应显著,其对拱肋轴力、弯矩和应力的影响增幅分别达到了19.24%、117.19%和98.18%,但其对吊杆应力的影响却较小,最大增量仅为2.1%。此外,温度效应对结构稳定性的影响较为突出,且梯度温度对拱肋悬拼过程中各节段偏位影响较大,最大偏差率达到68.8%,而对悬拼过程中拱肋结构的受力影响却较小。该分析结果可为类似环境下钢管混凝土拱桥的设计及施工提供理论支持。Taking a half-through concrete-filled steel tube arch bridge project in the north as the background,the influence of ambient temperature change and arch rib gradient temperature change on structural stress and stability was studied by collecting typical ambient temperature data and combining with finite element analysis.The results show that the influence of uniform temperature change on the structure is small,while the influence of gradient temperature is significant.The increase of axial force,bending moment and stress of arch rib is 19.24%,117.19%and 98.18%respectively,but its influence on the stress of suspender is small,and the maximum increment is only 2.1%.In addition,the influence of temperature effect on structural stability is more prominent,and the gradient temperature has a great influence on the deviation of each segment in the process of arch rib suspension,and the maximum deviation rate reaches 68.8%,but it has lttle influence on the force of arch rib structure in the process of suspension.The analysis results can provide theoretical support for the design and construction of CFST arch bridges in similar environments.

关 键 词：钢管混凝土拱桥 拱肋 均匀温度 梯度温度 稳定性 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U441.5[交通运输工程—道路与铁道工程]