Study Of The Structural Behavior Of The Continuous Steel-Concrete Composite Curved Box-Girder Bridge

The steel-concrete composite curved box girder is a new kind of composite structure, in which the concrete deck slab and the steel box co-act together has come into widely use by western developed countries because it has so many advantages such as big stiffness, low building height, good capability of contradicting shake, quick construction. Along with the development of our country’s transportation and the construction of city infrastructure, this type bridge must be widely used in China too. So this thesis proposes to study the structural behavior of a three-span steel-concrete composite curved box girder, it is significant.This thesis introduces the application and current research of the curved bridge at home and abroad, computational analysis theory about curved bridge, get a preliminary understanding about the stress characteristic and analytical method of curved girder. In order to study the structural behavior of the steel-concrete composite curved box girder bridge, the author uses ANSYS simulate a three-span steel-concrete composite curved box girder bridge. The main contents are follows:1. Research the structural behavior of the structure under dead load and live load including double-lane symmetry live loads and single-lane offset load.2. Research the structural behavior of the structure under two different temperature load which can reflect the condition of sudden cooling and sunshine influence.3. Research the structure mechanical behavior under different supporting forms and spacing of diaphragm.The results may be taken as reference for the design of steel-concrete composite curved box girder.