（1 同济大学预应力研究所， 上海 200092；  2 同济大学先进土木工程材料教育部重点实验室， 上海 200092；  3 中国海诚工程科技股份有限公司， 上海 200031； 4 华东建筑设计研究院有限公司， 上海 200002）

［摘要］对国家会展中心（上海）的大空间展厅的预应力混凝土框架结构进行了模型计算，分析得出了空间效应影响下的该预应力结构中次弯矩、次剪力、次轴力以及次扭矩的分布规律和数值。将空间结构分析中的预应力次内力与平面框架分析中的次内力相应情况进行了对比讨论，发现两种情况下的次内力存在显著的差异，明确了空间效应对该类型预应力混凝土结构的次内力具有显著影响。通过分析可知，该类空间效应显著的预应力混凝土框架结构的次内力特别是次弯矩、次轴力的数值可观，在结构设计中应具体考虑。

［关键词］预应力混凝土框架结构； 空间效应； 次内力； 次弯矩； 次轴力

中图分类号：TU378-2文献标识码：A文章编号：1002-848X(2018)08-0009-07

Analysis of secondary internal force of prestressed concrete frame structure with spatial effect

Xiong Xueyu1, 2， Xiang Ruibin1,3， Zhou Jianlong4

(1 Institute of Prestressed Structures, Tongji University, Shanghai 200092, China; 2 Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education, Shanghai 200092, China； 3 China Haisum Engineering Co.,  Ltd.,  Shanghai 200031, China； 4  Ｅａｓｔ Ｃｈｉｎａ Ａｒｃｈｉｔｅｃｔｕｒａｌ Ｄｅｓｉｇｎ ＆ Ｒｅｓｅａｒｃｈ Ｉｎｓｔｉｔｕｔｅ Ｃｏ．， Ｌｔｄ．， Ｓｈａｎｇｈａｉ ２００００２， Ｃｈｉｎａ)

Abstract:The model calculation was conducted on the prestressed concrete frame structure of the large space exhibition hall  of National Exhibition and Convention Center(Shanghai). The distribution laws and values of the secondary moment, secondary shear force, secondary axial force and secondary torque in the prestressed structure were analyzed under the influence of spatial effect. The secondary internal forces caused by prestressing in spatial structure analysis and in plane frame analysis were compared and discussed, and it was found that there were significant differences of secondary internal forces in the two cases, and effect of the spatial effect on internal force in this type of prestressed concrete structure was clarified. Through analysis, it showed that the secondary internal forces of the prestressed concrete frame structure, especially the secondary moment and secondary axial forces, are considerable, which should be taken into account in the structural design.

Keywords:prestressed concrete frame structure; spatial effect; secondary internal force; secondary moment; secondary axial force

*上海市科学技术委员会科研计划(13231200903)，国家自然科学基金资助项目（５１１７８３２８，５１５７８４００）。

作者简介：熊学玉，博士，教授，博士生导师，Email：xueyu@tongji.edu.cn。