Numerical Simulation Analysis of Beam-Reduction and Rib-Addition Strengthening Method of Hollow Slab Bridges

Abstract:

For the purpose of the study of the mechanical mechanism of beam-reduction and rib-addition strengthening method as well as the difference between hinged beam method and rigidly connected beam method, finite element models are established for hollow slab bridge before and after strengthening respectively with the finite element software Ansys. The stress distributions on hollow slab bridge before and after strengthening are compared through numerical simulation analysis. The improvement effects of beam-reduction and rib-addition method on the transverse connection and stress state of hollow slab bridge are analyzed at the same time. It is proved that this strengthening method is of obvious effect and the bearing capacity of the existing bridge can be greatly enhanced. Meanwhile, the result of numerical simulation analysis shows that the beam-reduction and rib-addition hinged beam method and rigidly connected beam method have the similar effects. Both of them result in much improvement of transverse distribution and enhancement of transverse connection. But the rigidly connected beam method has a better overall rigidity and a tighter transverse connection. Its improvement effect on the stress state of the old beam slab is superior to that of the hinged beam method.

• Periodical: Advanced Materials Research (Volumes 546-547)
• Pages: 57-65
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.546-547.57
• Online since: July 2012
• Authors: Guang Ning Pu, Li Jun Li, Yu Zhao
• Keywords: Beam-Reduction Method, Bridge Works, Hinged Beam Method, Hollow Slab Bridge, Numerical Simulation Analysis, Rib-Addition Strengthening Method, Rigidly Connected Beam Method

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