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	RC梁三维多向裂缝实验研究及数值模拟
	韩涛 ; 安雪晖 ; HAN Tao ; AN Xue-hui
	2010-06-10 ; 2010-06-10
关键词	钢筋混凝土 实验 数值模拟 多向裂缝 三维 reinforced concrete experiment numerical simulation multi-directional cracking 3D TU375.1
其他题名	EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF 3D MULTI-DIRECTIONAL CRACKING IN RC BEAM
中文摘要	在钢筋混凝土结构中,已存在裂缝对新裂缝的产生和发展有影响,从而对结构承载力性能亦有影响。为研究三维情况下裂缝交叉扩展的机理及其对结构承载力性能的影响,该文设计截面为正六边形对称配筋的钢筋混凝土梁实验,通过变换加载面和加载方式使梁分别产生竖直方向贯通的弯曲裂缝以及两种方向的剪切斜裂缝,并使各裂缝在空间相互交叉。通过实验,观察三维多向裂缝交叉扩展过程,测量梁各阶段荷载-挠度曲线,最后分析裂缝交叉扩展相互作用机理及其对梁构件承载力的影响的基本规律。针对多向裂缝相互作用机理建立三维多向固定裂缝模型,数值模拟结果表明该模型能够模拟多向裂缝交叉情况及其相互作用影响。; Existing cracks in RC structure influence the formation and propagation of new cracks, thus affect the behavior of the whole structure. Experiments on RC beams with regular hexagon cross section were carried out to study the mechanism of multi-directional cracking and its influence on the bearing capacity. Five-stage loading was applied. Bending cracks were designed to occur during the first 2 stages, penetrating the swhole cross section, then, changing loading condition, diagonal shear cracks were designed to cross the existing bending cracks during the next three stages. Multi-directional Crack propagations were observed, and reaction-displacement curves were recorded in experiments. The mechanism of 3D multi-directional cracking and its influence on bearing capacity were discussed, and a 3D fixed multi-crack model was developed. Adopting the newly developed model, a finite element analysis was performed. A comparison between numerical and experimental results shows that this model can be applied to analyze multi-directional cracking.; 国家自然科学基金项目(50309006)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/60445]
专题	清华大学
推荐引用方式 GB/T 7714	韩涛,安雪晖,HAN Tao,等. RC梁三维多向裂缝实验研究及数值模拟[J],2010, 2010.
APA	韩涛,安雪晖,HAN Tao,&AN Xue-hui.(2010).RC梁三维多向裂缝实验研究及数值模拟..
MLA	韩涛,et al."RC梁三维多向裂缝实验研究及数值模拟".(2010).

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