简支预应力混凝土箱梁的收缩徐变效应研究OA
Research on the Shrinkage and Creep Effects of Simply Supported Prestressed Concrete Box Beams
采用有限元方法对 60 m简支预应力混凝土箱梁的收缩应变、徐变应变与混凝土龄期之间的关系,收缩徐变效应对简支箱梁的竖向变形的影响,以及收缩徐变效应引起的预应力损失对简支箱梁的竖向变形的影响进行了研究.研究结果表明,在浇筑结束至龄期 100 d范围内,收缩徐变应变随龄期增长呈现出线性快速增长态势;龄期超过 100 d后,应变增大速度逐渐减缓;在混凝土浇筑结束至龄期 25 d时间范围内,徐变变形随龄期增长呈线性快速增长趋势;随混凝土龄期进一步增长,徐…查看全部>>
The finite element method was used to study the relationship between shrinkage strain,creep strain,and the age of a 60m simply supported prestressed concrete box girder.Additionally,the effects of shrinkage and creep on the vertical deformation of the box girder,as well as the impact of prestress loss caused by shrinkage and creep on its vertical deformation,were also examined.The research findings indicate that within a period of 100 days from the end…查看全部>>
孙贯拓;赵呈涛
宁波市奉化区交通投资发展集团有限公司宁波市交通规划设计研究院有限公司
土木建筑
桥梁工程预应力混凝土预制箱梁收缩效应徐变效应
bridge engineeringprestressed concreteprecast box girdershrinkage effectcreep effect
《城市建筑》 2024 (12)
210-212,3
浙江省自然科学基金项目(LY24E080010)宁波市交通科技项目(202104)
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