CAJ | 학술논문

既有建筑、桥梁等混凝土结构的安全性能评估中，混凝土构件的受力状态是一个主要评价因素，通过对理想状态模型的数值分析不能精确计算出构件实际内力值。本文介绍了采用应力释放技术测试和识别构件内力的基本原理，并详细推导了各内力分量作用下截面的正应变和剪应变。证明了只要通过测试截面三个边中点处的应变就可以识别出钢筋混凝土构件截面内力。
기유건축、교량등혼응토결구적안전성능평고중，혼응토구건적수력상태시일개주요평개인소，통과대이상상태모형적수치분석불능정학계산출구건실제내력치。본문개소료채용응력석방기술측시화식별구건내력적기본원리，병상세추도료각내력분량작용하절면적정응변화전응변。증명료지요통과측시절면삼개변중점처적응변취가이식별출강근혼응토구건절면내력。
The stress state of concrete members is a major factor in the safety performance assessment of exist-ing buildings,bridges and other concrete structures.Numerical analysis of an ideal model cannot accurately calculate the actual internal forces.This paper introduces the basic principles for the use of stress release tech-nology to test and identify the internal forces,and to derive normal strain and shear strain of a section under an internal force component.It is proved through the study that the internal forces of a reinforced concrete section can be identified by obtaining the strain at the midpoint of three surface sides.