Abstract

Info

Title:: Calculation of Rational Cantilever Length on Mountain Highway Curve Arch Bridge

Author(s):: DUAN Xiang; HAN Rui; WANG Bin-hua; LU Peng-min; Yunnan Traffic Consulting Co., Ltd.

Keywords:: curve arch bridge; cantilever length; horizontal curve; arch rip; finite element analysis; mountain highway

Abstract:: In order to analyze the design methods of mountain highway curve arch bridge, a curve arch bridge was studied, in which the span diameter was 120 m, the curve radius of the deck outline was 400 m, and the outline curve radius of the arch rib was 900 m. By the analysis of finite element model for the whole bridge, the relations between the torsional shear stress and the bridge cantilever length, at the arch foot, 1/4 arch rib and vault, were studied and the rational deck cantilever length was obtained. Through finite element analysis of other curve arch bridges with different spans, the optimum values of the deck cantilever with different spans, different horizontal curve radius decks were obtained, and the calculation formulae of the deck cantilever length were given. The design method proposed in the paper can provide reference for curve arch bridge design.