STUDY ON CONTROL OF CRACK IN PRESTRESSED CONCRETE STRUCTURES WITH LARGE LONGITUDINAL LENGTH
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摘要: 结合南京奥林匹克体育中心大平台裂缝控制的设计及研究工作,进行了补偿收缩C40混凝土的弹性模量、收缩及徐变试验。对长期试验的结果分析得到一些结论,针对超长预应力混凝土结构设计中的裂缝控制提出应结合混凝土的材料性能及实际施工过程,实现动态设计的建议。Abstract: Based on research on crack control of the large platform of Nanjing Olympic Center,experiments on elastic modulus,shrinkage,creep of C40 shrinkage compensation concrete were comducted and some conclusions were achieved from results of these long-term tests.Aiming at control of crack of this structure,it was put forward that design of concrete structures with large longitudinal length should be integrated with actural material characteristics and construction process to realize a dynamic design.
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Key words:
- concrete /
- elastic modulus /
- shrinkage /
- creep /
- crack
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张建仁, 王海臣, 杨伟军, 等. 混凝土早期抗压强度和弹性模量的 试验研究. 中外公路,2003, 23(3):89-92 王铁梦. 工程结构裂缝控制. 北京: 中国建筑工业出版社, 1997 王 涛. 南京长江二桥北汊桥 C50 高性能混凝土应用技术. 江苏 建材, 2003(1)
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