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《建筑技术》1982年第11期刊载了张登善、沈慧两同志的《关于屋架扶直吊装验算问题》一文,对《建筑施工手册》中有关屋架扶直吊装验算小的受力分析作了正确的纠正。但该文最后认为应选择最危险的阶段进行验算,一般情况下,上弦刚离地时的初始状态最危险。《建筑施工手册》编写组也认为上弦刚离地时最危险,所以要求验算屋架上弦平面外的强度和裂缝宽度。以上的结论同我们的试验结果及工程实践有很大的差距,现提出讨论。一、屋架扶直时屋架与底模之间的粘结
The 11th issue of “Architecture Technology” in 1982 contains the article “Checking the erection and erection of roof trusses” by Comrades Zhang Dengshan and Shen Hui, and correctly corrects the force analysis of the “construction manual” relating to the small calculations of erecting the trusses. Corrected. However, the article concludes that the most dangerous stage should be selected for checking. Under normal circumstances, the initial state when the string is just off the ground is most dangerous. The “Architectural Construction Handbook” writing team also considers that it is most dangerous when the strings are just off the ground. Therefore, it is required to check the strength and the width of cracks outside the plane of the roof frame. The above conclusions are very different from our experimental results and engineering practices. We are now discussing them. A. The adhesion between the roof frame and the bottom mold when the roof frame is straightened