A new method for the determination of effective flange width under uniform load on simply supported box girder bridges considering shear lag effect is proposed in this paper. Based on the Symplectic Elasticity method,...A new method for the determination of effective flange width under uniform load on simply supported box girder bridges considering shear lag effect is proposed in this paper. Based on the Symplectic Elasticity method, the flange slab of the box girder is simplified into a plane stress plate. Using equilibrium conditions of the plates, the Hamilton dual equations for top plate element is established. The analytical formulas of each plate element considering shear lag effect are derived. The closed polynomial effective width expression of flange slab under uniform load on the whole span length has been obtained. Through examples using the finite element method, the results obtained by the proposed method are examined and the accuracy of the proposed method is verified.展开更多
This paper presents an experimental study investigating factors influencing the effective width of steel reinforced concrete (SRC) column-steel beam joints of building in order to calculate its resisting moment.Five 1...This paper presents an experimental study investigating factors influencing the effective width of steel reinforced concrete (SRC) column-steel beam joints of building in order to calculate its resisting moment.Five 1/2 scaled interior SRC column-steel beam joint specimens were made with considering parameters such as beam flange width,beam depth and SRC column width.One directional increasing moment was applied to the joint by acting forces to each ends of beam and the structural behavior of joint was studied.And previous design method suggested by Deierlein was reviewed and a modified equation was proposed from the analysis of test result.Test result indicated that the equation to calculate the effective width in Deierlein’s design method didn’t consider effectively the influence caused by the variation of beam depth so that a modified equation was suggested and the validation of it was confirmed in this paper.展开更多
To explore the applicability of three-dimensional(3D)peridynamics(PD)in complex stress,36 reinforced concrete(RC)beams without web reinforcement were designed and tested,and investigated the effects of shear span rati...To explore the applicability of three-dimensional(3D)peridynamics(PD)in complex stress,36 reinforced concrete(RC)beams without web reinforcement were designed and tested,and investigated the effects of shear span ratio,longitudinal reinforcement,and flange width on the shear strength of beams.A 3D discretization model of all specimens in the test was established,and the specimens were simulated using the PD method.To consider the heterogeneity of concrete,a non-homogeneous PD model considering aggregate size was established,and the simulation results were compared with the original model.The results indicate that the shear span ratio,longitudinal reinforcement,and flange width have a significant impact on the shear strength of RC beams without web reinforcement.The 3D PD model has a good applicability for RC beams under complex stress.Without considering computational costs,heterogeneous models can obtain more accurate results than homogeneous models and better reflect the process of concrete beam failure.展开更多
基金supported by a grant from the Science and Technology Bureau of Jilin Province,China (No.20050531)
文摘A new method for the determination of effective flange width under uniform load on simply supported box girder bridges considering shear lag effect is proposed in this paper. Based on the Symplectic Elasticity method, the flange slab of the box girder is simplified into a plane stress plate. Using equilibrium conditions of the plates, the Hamilton dual equations for top plate element is established. The analytical formulas of each plate element considering shear lag effect are derived. The closed polynomial effective width expression of flange slab under uniform load on the whole span length has been obtained. Through examples using the finite element method, the results obtained by the proposed method are examined and the accuracy of the proposed method is verified.
基金supported by a grant from the Academic Research Program of Chungju National University in 2011
文摘This paper presents an experimental study investigating factors influencing the effective width of steel reinforced concrete (SRC) column-steel beam joints of building in order to calculate its resisting moment.Five 1/2 scaled interior SRC column-steel beam joint specimens were made with considering parameters such as beam flange width,beam depth and SRC column width.One directional increasing moment was applied to the joint by acting forces to each ends of beam and the structural behavior of joint was studied.And previous design method suggested by Deierlein was reviewed and a modified equation was proposed from the analysis of test result.Test result indicated that the equation to calculate the effective width in Deierlein’s design method didn’t consider effectively the influence caused by the variation of beam depth so that a modified equation was suggested and the validation of it was confirmed in this paper.
文摘To explore the applicability of three-dimensional(3D)peridynamics(PD)in complex stress,36 reinforced concrete(RC)beams without web reinforcement were designed and tested,and investigated the effects of shear span ratio,longitudinal reinforcement,and flange width on the shear strength of beams.A 3D discretization model of all specimens in the test was established,and the specimens were simulated using the PD method.To consider the heterogeneity of concrete,a non-homogeneous PD model considering aggregate size was established,and the simulation results were compared with the original model.The results indicate that the shear span ratio,longitudinal reinforcement,and flange width have a significant impact on the shear strength of RC beams without web reinforcement.The 3D PD model has a good applicability for RC beams under complex stress.Without considering computational costs,heterogeneous models can obtain more accurate results than homogeneous models and better reflect the process of concrete beam failure.
