NONLINEAR RESPONSE OF COMPOSITE STEEL-CONCRETE BOX GIRDER BRIDGES
Cellular steel section composite with a concrete deck is one of the most suitable superstructures in resisting torsional and warping effects induced by highway loading. This type of structure has inherently created new design problems for engineers in estimating its load distribution when subjected to moving vehicles. Current composite steel and concrete bridges are designed using full interaction theory assuming there is no any relative displacement or slip at interface of concrete and steel. However, in the assessment of existing composite bridges this simplification may not be warranted as it is often necessary to extract the greatest capacity and endurance from the structure.This may only be achieved using partial-interaction theory which truly reflects the behaviour of the structure. This paper presents a non linear three dimensional finite element model incorporating the slip of shear connectors using commercially available software ANSYS, capable of analyzing composite box girder bridges of various geometries. The proposed model has been validated against the published results from literature. A distribution factor approach has been suggested as a simplified design method for the preliminary proportioning of such bridges.
Composite construction Box- girder Partial interaction FEM Load distribution
TIWARI,Sanjay BHARGAVA, P. BHANDARI,N.M.
ⅡT Roorkee Roorkee,India
国际会议
上海
英文
133-143
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）