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对大跨度结构上部高度空间的利用进行了初步探讨。论述了材料承载力(强度力)性质及与作用力的区别。由内力分析结果,给出适用于预应力复杂结构体系中各构件截面的计算公式。对两类极限状态计算公式给予了充分论证,也得出了给结构体系施加预应力,使其能够承受更大荷载作用的根本原因。
The utilization of the upper space of the large-span structure was discussed. Discusses the material bearing capacity (strength) and the difference between the nature and force. Based on the results of internal force analysis, the formulas for calculating the cross section of each component in prestressed complex structural system are given. Two kinds of limit state calculation formulas are fully demonstrated, and the fundamental reason for applying prestressing force to the structural system and enabling it to withstand greater loads is also obtained.