FINITE ELEMENT ANALYSIS OF STEEL REINFORCED LIGHTWEIGHT CONCRETE BEAMS BASED ON BOND-SLIP RELATIONSHIP
In order to investigate the bond-slip influence on the performances of steel reinforced lightweight concrete beams nonlinear finite element simulation is conducted and the consequences are compared with the experimental results. The local bond-slip constitutive relation of steel reinforced lightweight concrete is established by push-out test. The steel stress distribution,cracks form,load-deflection curves of the steel reinforced lightweight concrete beams are analyzed through introducing the nonlinear stress-strain relationship of light concrete and the local bond-slip constitutive relation based on the existing bond force between the section steel and concrete interface. Influence factors involving shear span ratio and steel placing situation are considered. Analysis results show that the mechanical properties of the steel reinforced lightweight concrete beams are similar with that of the steel reinforced normal concrete beams. Diagonal shear failure are gradually transformed to flexural failure with the shear span ratio increasing. Load-deflection curve is obviously divided into three stages. Finite analysis results considering the bond agree well with the test results,while the capacity and stiffness without considering the bond are bigger than the experimental values.
Steel reinforced lightweight concrete beams Bond Finite element method Shear span ratio Load-deflection curve
Jian-Wen Zhang Xiao-Qing Yin Yu-Zhou Sima
Department of Civil Engineering,Nanyang Science and Technology University,Hanyang 473000,P.R. China Department of Civil Engineering,Nanyang Science and Technology University,Hanyang 473000,P.R.China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
180-183
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）