Safety Evaluation of Concrete Structures Based on a Novel Energy Criterion  

作　　者：Qiang Tong Qingwen Ren Lei Shen Linfei Zhang Yin Yang 

机构地区：[1]College of Mechanics and Materials,Hohai University,Nanjing,PR China [2]College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing,PR China [3]JiangSu Hydraulic Research Institute,Nanjing,PR China

出　　处：《Computer Modeling in Engineering & Sciences》2018年第1期33-58,共26页工程与科学中的计算机建模（英文）

基　　金：supported by The National Natural Science Foundation of China(No.51739006,11132003).

摘　　要：In this article,the post-peak softening stage of the constitutive relation and the elastic stiffness degradation of concrete are investigated,and a highly reasonable constitutive relation curve is proposed.At the material level,the energy change in the concrete failure process is studied based on the different stress-strain curves of concrete under uniaxial tension and compression.The concrete failure criterion based on elastic strain energy density is deemed suitable and consistent with the experimental phenomena.The hysteresis phenomenon(lags behind the peak strength)is also discussed.At the structure level,the strength reduction method is employed for the stability analysis,the energy change in the failure process of the Long Xi-Kou Dam is examined,and the results show that the dam failure criterion based on elastic strain energy shows a greater significance in practical applications compared with other conventional structural failure criteria in engineering.This criterion is objective and can avoid subjective arbitrariness.

关 键 词：PEAK stress point POST-PEAK SOFTENING stage elastic strain energy density CRITERION proposed CURVE strength reduction method 

分 类 号：TU5[建筑科学—建筑技术科学]