Analysis on Transverse Force of Large Span Variable Cross-section Box Girder with Corrugated Steel Webs(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2017年03期
- Page:
- 112-118
- Research Field:
- Publishing date:
Info
- Title:
- Analysis on Transverse Force of Large Span Variable Cross-section Box Girder with Corrugated Steel Webs
- Author(s):
- LI Li-feng; REN Hong-chang; ZHOU Cong; ZHOU Yan
- Key Laboratory of Wind and Bridge Engineering of Hunan Province, Hunan University
- Keywords:
- bridge engineering; transverse force; finite element method; bridge deck; steel web
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to study the transverse force of the roof of large span variable crosssection prestressed concrete （PC） composite box girder with corrugated steel webs under the local load of wheel, combined with two bridge examples, the solid finite element models of the two whole bridges were established. Three longitudinal typical cross sections were selected, the matched plane frame models considering the effective distribution width were established. According to the influence lines of transverse stress of the roof control sections in the solid finite element models, the transverse most unfavorable loadings of the spatial entity model and the plane frame model were applied. The maximum transverse tensile stress of control sections and the variation law along the longitudinal direction were obtained, and the calculation results of the two models were compared. The results show that the frame method is in good agreement with the solid finite element method for root sections of roof cantilever plates and inner sections of webs. While for midspan sections of roofs, the calculated results of frame method are conservative when the web space is larger, and the calculated results of the frame method should be properly reduced in design. With the moving of load position from midspan to support, the peak transverse stresses of midspan sections of roof decrease gradually, while the peak transverse stresses of root sections of cantilever plates and inner sections of webs have a tendency to increase. The diaphragms have little impact on the transverse force of the bridge deck. The transverse stress values of midspan sections of roofs decrease linearly with the increase of line stiffness of corrugated steel webs.
Last Update: 2017-05-31