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[1]吴方伯,左 瑞,文 俊,等.免拆模混凝土梁受弯性能试验[J].建筑科学与工程学报,2018,35(02):8-15.
 WU Fang-bo,ZUO Rui,WEN Jun,et al.Experiment on Bending Performance of Concrete Beam Without Demoulding[J].Journal of Architecture and Civil Engineering,2018,35(02):8-15.
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免拆模混凝土梁受弯性能试验(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
35卷
期数:
2018年02期
页码:
8-15
栏目:
出版日期:
2018-03-30

文章信息/Info

Title:
Experiment on Bending Performance of Concrete Beam Without Demoulding
作者:
吴方伯左 瑞文 俊刘 彪周绪红
湖南大学土木工程学院
Author(s):
WU Fang-bo ZUO Rui WEN Jun LIU Biao ZHOU Xu-hong
College of Civil Engineering, Hunan University
关键词:
U形混凝土模块免拆模混凝土梁单向静力试验受力性能荷载特征值
Keywords:
U-shaped concrete formwork concrete beam without demoulding unidirectional static experiment mechanical behavior load characteristic value
分类号:
-
DOI:
-
文献标志码:
A
摘要:
为研究免拆模混凝土梁的受弯性能,设计制作1根免拆模混凝土梁和1根现浇对比梁,对2个试件进行单向静力加载,得到了各试件的破坏形态、荷载特征值、荷载混凝土应变曲线、荷载钢筋应变曲线、荷载跨中位移曲线,并将其进行对比分析。结果表明:在试件屈服前,免拆模混凝土梁与现浇梁的裂缝发展有较大区别,但最终破坏时2个试件的整体破坏特征基本相似;免拆模混凝土梁的预制U形混凝土模块与内部后浇混凝土结合较好,整个加载过程未出现U形模块脱落或撕裂现象;免拆模混凝土梁的开裂荷载相比现浇梁试件要小8%,但2个试件的极限荷载基本相同,实际工程中可采用现行《混凝土结构设计规范》对免拆模混凝土梁的开裂荷载、极限荷载进行计算,结果偏安全。
Abstract:
In order to study the bending performance of concrete beam without demoulding, a concrete beam without demoulding and a cast-in-place contrast beam were designed. Two specimens were subjected to unidirectional static loading, and the failure modes, load characteristic values, load-strain curves of concrete, load-strain curves of reinforcement and load-displacement curves of midspan were obtained and compared. The results show that the crack development of concrete beam without demoulding and cast-in-place beam is quite different in the pre-yield phase of component, but the overall damage characteristics of the two specimens are basically similar in the end of the failure. The U-shaped concrete formwork of concrete beams without demoulding works well with internal post pouring concrete, and through the entire loading process, the U-shaped concrete formwork doesn’t fall off and tear. The cracking load of concrete beam without demoulding is about 8% lower than that of the cast-in-place beam, but the ultimate load of the two specimens are roughly the same. In practical engineering project, the current Code for Design of Concrete Structures can be used to calculate the cracking load and the ultimate load of concrete beam without demoulding, and the result is safe.

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更新日期/Last Update: 2018-04-04