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- Title
装配式节段梁UHPC湿接缝界面力学性能数值模拟分析.
- Authors
殷雨时; 杨纪; 苏庆田; 张冠华; 易富; 王吉忠
- Abstract
In order to solve the problems of weak shear resistance, easily stripped joint interface and poor durability of diamond-shaped wet joint of fabricated segmental beam, a "干"-shaped ultra-high performance concrete (UHPC) wet joint structure is designed. ABAQUS finite element software is used to analyze the effects of joint structure, joint reinforcement ratio and joint bond surface roughness on the mechanical properties of UHPC wet joint interface. The results show that the finite element model based on Traction-Separation bond surface can better simulate the mechanical properties of wet joint interface of segmental beam. The interfacial mechanical properties of "干"-shaped joint proposed are significantly better than those of diamond-shaped joint. The tangential shear stress concentration area of the interface is much smaller than that of the diamond-shaped joint. The maximum stripping displacement of reinforcement and UHPC in the tensile area of positive moment can be reduced by about 83.7%. The interfacial bonding normal stress of "干"-shaped wet joint does not increase in the same proportion with the increase of reinforcement ratio, and the influence of reinforcement ratio on interfacial tangential shear stress shows a bimodal effect. The reinforcement ratio of wet joint is recommended to be 4.8%. Reinforcement ratio and interfacial roughness have little effect on the normal stripping displacement of wet joint interface, which can be ignored.
- Subjects
INTERFACIAL roughness; INTERFACIAL bonding; FINITE element method; STRESS concentration; SHEARING force; SURFACE roughness
- Publication
Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao, 2023, Vol 63, Issue 1, p77
- ISSN
1000-8608
- Publication type
Article
- DOI
10.7511/dllgxb202301010