连续刚构设计方法探讨
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摘要
采用传统设计方法和新设计思路对支架法施工的多跨预应力混凝土连续刚构桥进行了分析比较,提出了在预应力混凝土连续刚构桥边墩承台顶部设置纵向活动支座与墩身底部连接来释放结构纵向约束,减少结构超静定次数,从而达到减少结构次内力、优化结构受力目的的先铰接后固接的设计思路,并阐述了施工可行性,提出了完善的施工方案。
In this paper,the support construction method for multi-span prestressed concrete continuous rigid frame bridges was analyzed.The traditional design methods and a new design approach,"hinged connectionfixed connection"were compared.This method sets longitudinally movable supports and pier shaft bottom connections on the tops of abutments of prestressed concrete continuous rigid frame bridges to release structure vertical restraints and to reduce structural redundancy.Therefore,structural secondary forces were reduced and stress distribution was optimized.In addition,the construction feasibility was elaborated and a refined construction program was proposed in the paper.
In this paper,the support construction method for multi-span prestressed concrete continuous rigid frame bridges was analyzed.The traditional design methods and a new design approach,"hinged connectionfixed connection"were compared.This method sets longitudinally movable supports and pier shaft bottom connections on the tops of abutments of prestressed concrete continuous rigid frame bridges to release structure vertical restraints and to reduce structural redundancy.Therefore,structural secondary forces were reduced and stress distribution was optimized.In addition,the construction feasibility was elaborated and a refined construction program was proposed in the paper.
引文
[1]中华人民共和国铁道部.TB1002.3—2005铁路桥涵钢筋混凝土和预应力混凝土结构设计规范[S].北京:中国铁道出版社,2005.Ministry of Railways of the People’s Republic of China.TB 1002.3—2005 Code for design on reinforced and prestressed concrete structure of railway bridge and culvert[S].Beijing:China Railway Press,2005.(in Chinese)
[2]龙驭球,包世华.结构力学教程(Ⅰ)[M].北京:高等教育出版社,2003.Long Yuqiu,Bao Shihua.Structural mechanics tutorial(Ⅰ)[M].Beijing:Higher Education Press,2003.(in Chinese)
[3]程新春.梁板结构有限元分析的非等效荷载处理方法[J].结构工程师,2011,(4):28-31.Cheng Xinchun.Non-equivalent loads in finite element analysis of slab-beam structures[J].Structure Engineers,2011,(4):28-31.(in Chinese)
[4]叶列平,曲哲,陆新征,等.提高建筑结构抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.Ye Lieping,Qu Zhe,Lu Xingzheng,et al.Collapse prevention of building structures:a lesson from the Wenchuan earthquake[J].Journal of Building Structures,29(4):42-50.(in Chinese)
[2]龙驭球,包世华.结构力学教程(Ⅰ)[M].北京:高等教育出版社,2003.Long Yuqiu,Bao Shihua.Structural mechanics tutorial(Ⅰ)[M].Beijing:Higher Education Press,2003.(in Chinese)
[3]程新春.梁板结构有限元分析的非等效荷载处理方法[J].结构工程师,2011,(4):28-31.Cheng Xinchun.Non-equivalent loads in finite element analysis of slab-beam structures[J].Structure Engineers,2011,(4):28-31.(in Chinese)
[4]叶列平,曲哲,陆新征,等.提高建筑结构抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.Ye Lieping,Qu Zhe,Lu Xingzheng,et al.Collapse prevention of building structures:a lesson from the Wenchuan earthquake[J].Journal of Building Structures,29(4):42-50.(in Chinese)
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