Research on the Space Stress-distribution Characteristics of Long-span and Complex Structure Bridge during the Whole Construction Process
HU Guo-wei1, ZHANG Yu-ning1, ZHANG Jun-bing1, SHI Zhou2
1.The Third Engineering Group Co. Ltd. Of China Railway, Taiyuan, Shanxi 030001, China;2. Southwest Jiaotong University, Sichuan, Chengdu 610031, China
Abstract：Research purposes：By establishing three-dimensional non-linear model with aging and road construction efficiency analysis for the whole construction process, the research is done on the space stress-distribution characteristics of large-span V-shaped continuous rigid frame arch composite structure bridge during the whole construction process to solve the problem of uneven stress-distribution on the cross-section due to the shear lag and distortion of concrete box girder with the previous calculation method for bridge design and construction monitoring.
Research conclusions：The analyses are made for the space stress-distribution and spatial variation of the longitudinal normal stress and transverse compressive stresson the roof and the shear stresson the sternum of large-span V-shaped continuous rigid frame arch composite structure bridge and their change regulations during the whole construction process. From the analyses the following conclusions are drawn: Firstly, the longitudinal normal stress on the roof of main girder is distributed along the transverse direction with unevenness, and the shear lag effects of the stress are obvious, which is different from the predicted results with elementary beam theory. Secondly, the transverse compressive stress of the main girder is not big and the uneven level of stress distribution on the roof is more than that on the floor.Thirdly, the shear stress distribution on the tri-web of single-box and double-booth section girder continuously changes and the shear stress on center web is slightly greater than that on the side web with good regulation. Lastly, during construction the envelope of longitudinal normal stress reflects the working condition with the maximum tensile stress and maximum compressive stress and this provides a theoretical basis for construction control.
胡国伟；张宇宁；张俊兵；施 洲. 大跨度复杂结构桥梁施工全过程结构空间受力特性研究[J]. 铁道工程学报, 2010, 27(3): 42-48.
HU Guo-wei, ZHANG Yu-ning, ZHANG Jun-bing, SHI Zhou. Research on the Space Stress-distribution Characteristics of Long-span and Complex Structure Bridge during the Whole Construction Process. 铁道工程学报, 2010, 27(3): 42-48.
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2010, Vol. 27 
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