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一、概述近几年来,我校做了200多个10×10×30cm和36个20×20×70cm普通混凝土和陶粒混凝土在无箍和配箍约束条件下的柱体应力-应变全曲线试验研究。试验中采用在试件相对的两侧面中部预埋螺钉测点,用位移传感器量测纵向应变。试件用压力试验机加载,由荷载传感器和位移传感器将感应信号输入动态应变仪,再经X-Y函数记录仪直接绘制出两条荷载-应变全曲线。将荷载座标换算成应力座标后得到应力-应变全曲线。试验时,对试件
I. Overview In recent years, our school has done more than 200 full-scale stress-strain curves of 10×10×30cm and 36 20×20×70cm ordinary concrete and ceramsite concrete under the condition of no hoop and hoop binding. Experimental Research. In the test, the measurement points of the screw were embedded in the middle of the opposite sides of the test piece, and the longitudinal strain was measured with a displacement sensor. The test piece was loaded with a pressure tester. The load sensor and the displacement sensor input the sensing signal to the dynamic strain gauge. Two load-strain curves were then drawn directly by the X-Y function recorder. The stress-strain curve is obtained by converting the load coordinates into stress coordinates. During the test, the test piece