Analyse Bond-Slip Of The Steel Reinforce Concrete Structure By Noline Finite Element

Steel Reinforced Concrete structure is composite structure which Reinforced Concrete embraces steel. Steel Reinforced Concrete structure not only has high load-bearing, big stiffness, good resisting seismic, good ductility, good fire resistance but also effectively reduces member cross-section to improve load-bearing.This thesis generalizes the present development and the application of Steel Reinforced Concrete (SRC) Composite Structures at home and abroad, and gives a detailed statement of the research status, achievement,and the problems existed as to the bond property and the bond-slip construction.Least sqaure method was used in this peper with push-out test of sixteen reinforce concrete what dealed with in consult [1] to describe the consititutive relation ofτ- slin interval force of begin slip of loading end and limit load ,draw a conculation of consititutive relation ofτ- s_l,and consider it as the consititutive relation of bond-slip ,and build a nonlinear and separate type of finite element of mechanical model ,and then calculate the mechanical behavior of reinforce concrete on the background of in axial force. The rule of the bond strain,bond stress and the slip was get.The influence in force and bond strength by thickness of concrete protective cover, stirrup ratio, anchoring length.The result show that :(1)The result of caculation and experiment was consistence and we draw a conclusion that adoption Combination39 can imitates the bond-slip constitutive relations of the Steel Reinforced Concrete structure. (2)the distributions of bond stress and slip along anchorage were changed .The stress was enlarge with force enlarge.influence of the concret strength and thickness ,steel ratio,anchorage were different.we should conside it differently.Theoretical basis is provided by the conclusion drawed by this paper to find out mechanical behavior of reinforce and design the component.