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Structural Engineering and Mechanics Volume 47, Number 1, July10 2013 , pages 59-73 DOI: https://doi.org/10.12989/sem.2013.47.1.059 |
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Spatial mechanical behaviors of long-span V-shape rigid frame composite arch bridges |
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Hongye Gou, Qianhui Pu, Junming Wang, Zeyu Chen and Shiqiang Qin
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| Abstract | ||
| The Xiaolan channel super large bridge is unique in style and with greatest span in the world with a total length of 7686.57 m. The main bridge with spans arranged as 100m+220m+100m is a combined structure composed of prestressed concrete V-shape rigid frame and concrete-filled steel tubular flexible arch. First of all, the author compiles APDL command flow program by using the unit birth-death technique and establishes simulation calculation model in the whole construction process. The creep characteristics of concrete are also taken into account. The force ratio of the suspender, arch and beam is discussed. The authors conduct studies on the three-plate webs\'s rule of shear stress distribution, the box girder\'s longitudinal bending normal stress on every construction stage, meanwhile the distribution law of longitudinal bending normal stress and transverse bending normal stress of completed bridge\'s box girder. Results show that, as a new combined bridge, it is featured by: Girder and arch resist forces together; Moment effects of the structure are mainly presented as compressed arch and tensioned girder; The bridge type brings the girder and arch on resisting forces into full play; Great in vertical stiffness and slender in appearance. | ||
| Key Words | ||
| bridge engineering; long-span V-shape rigid frame composite arch bridge; simulation calculation in the whole construction process; stress distribution law; spatial mechanical behaviors | ||
| Address | ||
| Hongye Gou, Qianhui Pu, Shiqiang Qin : Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, 610031, P.R. China Junming Wang : Architecture and Survey Design Institute of Southwest Jiaotong University, Chengdu, 610031, P.R. China Zeyu Chen : China Railway Siyuan Survey and Design Group Co. Ltd., Wuhan, 430063, P.R. China | ||