Accurate Stress Analysis on Steel Box Girder of Long Span Suspension Bridges Based on Multi-Scale Submodeling Method

Abstract

The streamline flat steel box girder is broadly used in long span cable-supported bridges all over the world. As one of the most important part of the bridges, its stress level and distribution under various dynamic loads are especially concerned. However, it is difficult to obtain the accurate stress of the steel box girder by common finite element (FE) calculation. The Runyang Suspension Bridge (RSB) is taken as an example. To increase the accuracy of results, a 3-dimensional FE full model for the RSB is created by ANSYS and a spatial submodel of the steel box girder is particularly built with greater detail. Submodeling method is then employed as a connection technique to link different scale models. After the global analysis and connecting process, the local stress of the steel box girder under various vehicle loads is obtained by submodel analysis. The composite action between the full model and the submodel is analyzed, and the reasonable mesh size for the submodel is specially investigated. The numerical results are proved to be accurate by the field test results. This study demonstrates the reliability and efficiency of the submodeling method; and can provide references for accurately analyzing and designing the steel box girders of other long span bridges.

Influence of Fluid Viscous Damper on the Dynamic Response of Suspension Bridge under Random Traffic Load

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Dynamic response of a steel pipeline with bolted connections to a mining shock obtained with the submodeling technique

“…The bolts used in the connection were the M30 bolts class 5.6 (yield stress of 300 MPa, resistant stress of 500 MPa). For the effective analysis of the dynamic response of pipeline to a mining shock, the submodeling technique was used [1,[7][8][9][10][11]. The submodeling technique is used mostly to study local parts of structures.…”

Analysis of the Fracture Behavior of Orthopedic Cement Using Submodeling Technique

“…Indeed, the submodeling technique is an effective method for investigating the local stress of complex structures and has been successfully applied to several recurring engineering problems. For example, the submodeling method has been used for stress analysis of cemented glenoid prostheses in Total Shoulder Arthroplasty [3], contacting bodies [4,5], electromagnetic fields [6], 3D crack behavior in the orthopedic cement mantle of a total hip replacement [2,7,8], study of inserts in composites [9], contact pressure and wear of hard bearing couples in hip prosthesis [10], and other complex structures [11][12].…”