Based On The Reinforced Concrete Slabs Of Unified Constitutive Process Analysis Method Research

This article based on to tutor professor bakx r subject of national973project"bridge structure evolution theory and behavior safety monitoring methodresearch" subject of natural science foundation of China (key) and chongqing"bridge facial perception method and theory of safety evaluation research". To30m span prestressed slabs was the basis of the whole life process of research,analysis of beam structure under load process performance analysis method andtheory, to solve the problem of deformation and damage of the reinforced concretebridge calculation basis. This paper mainly studies the following aspects ofcontent:①To investigate the unified constitutive relation in UMAT (ABAQUS)secondary development platform of the realization method, and through thecalculation and ABAQUS UMAT tangent stiffness method program bringmaterial model comparing the calculation results, verify the UMAT program onthe constitutive relation to realize the accuracy, usefulness.②The study of the full-scale slabs was30m in the occurrence anddevelopment of various cracks under static load and its effect on the performanceof the structure, as well as crack resistance, strength, fracture restore performanceand deformation of structures until the destruction of the whole process ofexperimental study.③Through the ABAQUS user material subroutine UMAT development,implementation is based on unified constitutive relation of30m prestressedreinforced concrete slabs was loading the whole process of simulation.④Using ABAQUS to calculate the deformation, stress, such as the wholeprocess of analysis results are compared with experimental results of the full-scaleslabs was30m analysis research, preliminary explored based on reinforcedconcrete unified constitutive relation of the whole process of reinforced concretestructures under load behavior research methods.⑤Combined with the pressure of axis of reinforced concrete members, thewhole process of experiment and30m slabs simulation analysis and calculationresults, the preliminary discussion on the average crack spacing in the reinforcedconcrete structure and macro strain, the average crack width and macro strainrelations of computing.