（福建省建筑科学研究院，福州 350025）

［摘要］预应力扁梁的梁宽不仅大于梁高，且常大于柱宽，其框架节点的传力机理较为复杂。采用变角空间桁架模型对扁梁框架节点柱宽范围以外的外核心区受力机理进行分析，并根据“压弯剪扭”相关关系推导出一种能反映扁梁框架节点柱宽范围以外的外核心区受力状况的抗剪承载力计算公式，并进行了拟静力试验验证。

［关键词］预应力扁梁框架节点；外核心区；变角空间桁架模型；拟静力试验

中图分类号：TU378.4文献标识码：A文章编号：1002-848X(2011)03-0064-05

Mechanism of loads transfer in the exterior core of prestressed concrete flat beam frame joints

Li Bin

(Fujian Academy of Building Research, Fuzhou 350025, China)

Abstract:The width of prestressed concrete flat beam section is not only larger than its height, but also always larger than the width of column section, which makes the mechanism of loads transfer in the joints more complex. Varied-angel truss model was applied to analyze the loading behaviour of the exterior core of prestressed concrete flat beam frame joints under the torsion plus shear, bend and compression. A new formula was derivated to reflct the inflection of additional torsion to the exterior core of the joints and the seismetic behaviour of the joints was surveyed by means of pseudo-static test.

Keywords:prestressed concrete flat beam frame joints; exterior core; varied-angle truss model; pseudo-static test

作者简介：李斌，硕士，一级注册结构工程师，Email：tadpolee@sina.com。

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