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本文根据单次予应力铜结构中的特点和问题进一步探讨了多次予应力钢结构的性质和要求，并且在理论上推演出一系列说明多次予应力铜结构特点的计算公式。根据公式又系统地阐述了多次予应力钢结构的设计原则。最后以１２公尺跨度多次予应力铜屋架的试验结果验证了上述的理论分析部分。＊白由要内容是作者１９６０年初在范朕莫斯＊此染工程学院研究部答辩通注的科半技术候捕博士论文“用拉索”多＊巴拉的子回力钢窃构研究”ｕ。的理谕分析部分Ｏ论天的科芈导师力科徉技个博士Ｅ．Ｎ．邱—＊ｚ教授。
In this paper, according to the characteristics and problems in a single prestressed copper structure, the properties and requirements of multiple prestressed steel structures are further explored, and a series of calculation formulas describing the characteristics of multiple prestressed copper structures are theoretically deduced. According to the formula, the design principles of multiple prestressed steel structures are systematically elaborated. Finally, the results of the above-mentioned theoretical analysis were verified by the test results of multiple stress-stressed copper roof trusses spanning 12 meters. * Bai Youzhi’s content is the author’s Ph.D. dissertation on the semi-technical Ph. A detailed analysis of the part O is about the day’s science teacher, Dr. E.N. Qiu-*z.