（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 上海同吉建筑工程设计有限公司， 上海 200092；5 上海建筑设计研究院有限公司， 上海 200041）

［摘要］基于《预应力混凝土结构设计规范》（JGJ 369—2016）的编制、《预应力混凝土结构设计规程》（DGJ 08-69—2015）的修订及相关的前期研究，主要针对超长混凝土结构与预应力设计的一些重要方面进行介绍探讨：提出广义超长结构的概念，使超长混凝土结构及相关预应力设计更科学合理；超长混凝土结构中约束及其对预应力效应的影响，在超长混凝土结构及相关预应力设计中需合理考虑结构约束；超长混凝土结构施工过程的时间效应与路径效应及其影响；总结提出超长混凝土结构裂缝控制的“防”原则并将之与现已广泛提及的“抗”、“放”原则一起作为裂缝控制的原则，在实践应用中可将“抗”、“放”、“防”原则有机结合而采取综合的裂缝控制措施。

［关键词］超长混凝土结构； 预应力； 裂缝控制； 设计

中图分类号：TU378-2文献标识码：A文章编号：1002-848X(2018)08-0005-04

Prestress design of super-long concrete structure

Xiong Xueyu1,2, Xiang Ruibin1,3, Wang Jishu4， Li Yaming5

(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 Shanghai Tongji Building Engineering Design Co.,  Ltd., Shanghai 200092, China；5 Shanghai Architectural Design and Research Co., Ltd.， Ｓｈａｎｇｈａｉ ２０００41， Ｃｈｉｎａ)

Abstract:Based on the compilation of the Code for design of prestressed concrete (JGJ 369—2016), revise of the Design code for prestressed concrete structures (DGJ 08-69—2015) and related previous studies, some important aspects of super-long concrete structure and prestress design were introduced. The concept of generalized super-long structure was proposed to make the design of super-long concrete structure and related prestress design more scientific and reasonable. Considering effects of constraints in super-long concrete structure on prestress effect, structural constraints were needed to be taken into account reasonably in the design of super-long concrete structures and related prestress design. The time effects and path effects of the super-long concrete structure in the construction process should be considered. The principle of “prevention” was put forward to control cracks in superlong concrete structure and this principle was combined with the widely-mentioned principles of “resistance” and “release” to become the principle of crack control,  in practice, principles of “resistance”, “release” and “prevention” can be organically combined to take comprehensive crack control measures.

Keywords:super-long concrete structure; prestress; crack control; design

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