白福波
    （哈尔滨工业大学建筑设计研究院，哈尔滨150090）

[摘要] 对大跨度结构上部高度空问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。
[关键词] 框架拱索梁；作用内力；承载力；强度力；分子力

    Frame arched cable beam section calculation formula prestressed concrete
    Bai Fubo
    (The Architectural Design and Research Institute of Harbin Institute of Technology, Harbin  150090, China)

Abstract: To long span structure upper part ,The space making use of has carried out investigation and discussion.From the matter macroscopic view ,two microcosmic aspect ,have discussed material bear the force (intensityforce) character ,And it and the acting force difference. In analysing result from the internal force ,giving a prestressing force out complicated structure system every member cross section calculation formula. Both limits state calculation formula were gave sufficient demonstration. After the system having explained structure exerts prestressing force, be able to bear bigger load effect cause.
Keywords: frame arch cable beam; action internal force; bear the force; strength force; molecular force.