Study on Time-Variant Robustness Assessment Method of Complex Bridges

Jin Song Zhu; Jian Song

doi:10.4028/www.scientific.net/AMR.250-253.1962

Paper Titles

Numerical Simulation of Stability to Muzhuping Slope Failed by Impoundment in Shuibuya Reservoir
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Durability Based Indexes of Coarse Aggregate for Cement Concrete
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Effects of Soil Properties Uncertainty on Reliability Index of Slope
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Study of the General Form of 3D Limit Equilibrium
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Study on Time-Variant Robustness Assessment Method of Complex Bridges
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Seismic Performance Analysis of a Continuous Girder Bridge with Precast Segmental Pier
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Research on the Vibration Attenuation Rules and Wave Propagation Law under Impacting Drill on the Deep Soil Layer
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Research on the Earthquake Dynamic Responses of Tunnel under Changing Tunnel Lining Rigidity
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Deformation and Internal Force Analysis of Deep Foundation Pit Excavation with Outrigger-Type Diaphragm Wall
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Study on Time-Variant Robustness Assessment Method of Complex Bridges

Abstract:

In order to accurately assess the robustness of the complex bridge structure, a method of robustness assessment that takes structure degradation and accidental loads into consideration is proposed. Firstly, the degradation rates of member section properties and the increasing rate of live load are set as variables. The parametrical model of structure is established by the finite element software of ANSYS. Secondly, the structure robustness is based upon analysis from the robustness index, the reserve strength factor and the residual strength factor. The effects of three degradation rates of section properties, the established increasing rate of live loads and accidental loads on the robustness of bridges are considered. Finally, this method is used to analyze the time-variant robustness of Guotai Bridge located on the Haihe River of Tianjin. The results indicate that different degradation rates of member section properties have different effect on the robustness of Guotai Bridge, the effect of accidental loads has a close relationship with its acting position.