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本专题的研究工作分两个阶段进行。第一阶段为正截面疲劳验算方法的研究,完成了16根钢筋混凝土矩形和T形梁的试验;第二阶段为斜截面疲劳计算及裂缝控制方法的研究,完成了21根钢筋混凝土T形薄膜梁的试验,研究成果经初步的设计比较,比现行规范合理并具有明显的经济效果。一、正截面试验研究的主要结果及正截面疲劳验算公式。 (一)在多次重复荷载作用下,沿梁截
The research work on this topic is conducted in two phases. The first stage is the study of normal section fatigue checking method. The test of 16 rectangular reinforced concrete and T-shaped beams is completed. The second stage is the fatigue calculation of oblique section and the study of crack control methods. The 21 reinforced concrete T-shaped films are completed. Liang’s experiments and research results have been initially designed and compared and are more reasonable than the current norms and have obvious economic effects. First, the main results of the normal section test study and normal section fatigue checking formula. (I) Cut along the beam under multiple repeated loads