Mechanics and deformation characteristic of doublearch soilsteel bridge(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2022年2期
- Page:
- 10-22
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Mechanics and deformation characteristic of doublearch soilsteel bridge
- Author(s):
- FENG Jimeng1; YU Longping1; LI Jia2; DING Xiaoqi1; ZHANG Jiao2; ZHANG Junru1
- 1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University,〖JP〗Chengdu 610031, Sichuan, China; 2. The 1st Engineering Co., Ltd. of China RailwayTunnel Group,Chongqing 401123, China
- Keywords:
- road engineering; doublearch soilsteel bridge with concrete foundation; stress and deformation characteristics; nonuniform filling; numerical simulation; field measurement
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to clarify the deformation characteristics of doublearch soilsteel bridge contrasted with other culvert forms, the deformation and stress distribution of circular steel corrugated plate culvert and double arch steel corrugated plate culvert under fill load were evaluated by numerical simulation. The deformation and stress characteristics of doublearch soilsteel bridges with concrete foundation were obtained. Furthermore, the difference between the data was compared by the field test of the circumferential stress of the corrugated plate with the height of the fill. The results show that due to the limited effect of concrete foundations, the deformation of the culvert is far less than that of the circular soilsteel bridge, so it should be characterized as a rigid structure. The limited state method of circumferential pressure theory should not be used for safety checks. The axial force increases gradually from the arch crown to both sides of the arch foot, and the value of the arch foot is the minimum. The direction of moment in the arch crown is to the inside of the culvert, and the moment below the arch waist is toward the outside of the culvert. In addition, the law of deformation and stress distribution of the corrugated steel plate is consistent, and the correctness of the numerical calculation is verified. But due to the discontinuity of structural stiffness caused by bolt connection and insufficient compaction of construction fill, the doublearch soilsteel bridge with concrete foundation is prone to stress concentration, so the safety of culverts is decreased significantly. To enhance the safety of filling construction of culvert structure, it is proposed that attention should be paid to the construction quality of bolt connection and the compactness of filling soil in the construction of similar projects. 2 tabs, 25 figs, 26 refs.
Last Update: 2022-04-13