论文部分内容阅读
本文应用自行设计的加载装置，采用截面为７０×７０ｍｍ无预设裂缝试件，在ＭＴＳ伺服式疲劳试验机上，成功地测得了混凝土受轴向拉伸低周循环荷载作用时的应力一变形全曲线，并给出了全曲线方程以及在下降段进行卸载与重新加载的曲线方程．试验证明：循环荷载作用下应力－变形曲线包络线与单调荷载作用下的应力－变形全曲线基本一致．为混凝土结构及钢筋混凝土结构在循环荷载作用下的准确计算提供参考和依据．
In this paper, using a self-designed loading device, the stress-deformation of concrete subjected to low-cycle cyclic loading under axial tension was successfully measured on a MTS servo fatigue tester with a pre-existing 70 × 70mm fracture specimen. Curve, and gives the full curve equation and the descending section of the unloading and reloading curve equation. The experiment shows that the envelope of stress-strain curve under cyclic load is basically consistent with the stress-strain curve of monotonic load. It provides reference and basis for accurate calculation of concrete structures and reinforced concrete structures under cyclic loading.