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体外预应力叠合梁变形与裂缝宽度计算方法
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【工民建结构设计论文】摘要：本文在体外预应力叠合梁实验结果和理论分析的基础上，结合体外预应力梁已有的研究成果，同时考虑混凝土叠合构件的二阶段受力特性，提出了与现行《混凝土结构设计规范》（GB50010—2002）相适应的体外预应力叠合梁变形及最大裂缝宽度计算公式。通过与实验实测结果对比，表明该公式计算精度较高，可满足工程设计要求。
关键词：体外预应力 叠合梁 变形 裂缝宽度
Abstract ：On the basis of the experimental research and theoretical analysis, the calculation formula is advanced for deformation and maximum crack width corresponded to the present《Design Code for Concrete Structure》（GB50010-2002）considering the force bearing property of two stages of the laminated elements of concrete, combined with recent research results for beams of external prestressed. The comparison between the result calculated from the above formula and the experimental result shows that the calculation precision is high enough to meet the demand of project design.
Key words：external prestressing；laminated beam；deformation；crack width
0、引言
体外预应力叠合梁既具有预应力结
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