纤维混凝土隧道衬砌管片抗裂性能数值模拟  

Numerical Simulation of Crack Resistance of Fiber Reinforced Concrete Tunnel Lining Segment

作　　者：占羿箭 ZHAN Yijian(Shanghai Construction Group Co.,Ltd.,Shanghai 200080,China;Shanghai Engineering Research Center of Mega Structure High Performance Concrete,Shanghai 200080,China)

机构地区：[1]上海建工集团股份有限公司,上海200080 [2]上海高大结构高性能混凝土工程技术研究中心,上海200080

出　　处：《建筑施工》2025年第4期582-585,589,共5页Building Construction

基　　金：上海市科学技术委员会资助项目(18DZ2282600)。

摘　　要：针对纤维混凝土材料和结构建立一系列力学分析和数值仿真模型,进而研究不同空间尺度下诸多重要参数对材料性能和结构行为的影响。首先基于力学分析提出单纤维拉拔响应理论模型,然后建立纤维混凝土裂缝桥接应力计算模型,最后开发了基于实体界面单元的数值模拟程序。由算例分析可见,系列模型准确反映了纤维混凝土隧道衬砌管片受不同类型载荷作用下的破坏机理和承载能力,为混凝土结构的三维数值分析和构件优化设计提供有力支撑。A series of mechanical analysis and numerical simulation models are established for fiber reinforced concrete materials and structures to study the effects of several important parameters on material properties and structural behavior at different spatial scales.A theoretical model for single fiber pullout response is proposed based on mechanical analysis,followed by the establishment of a crack bridging stress calculation model for fiber reinforced concrete.Finally,a numerical simulation program based on solid interface elements is developed.Example analysis shows that the models accurately reflect the failure mechanisms and bearing capacity of fiber reinforced concrete tunnel lining segments under different types of loads,providing strong support for the three-dimensional numerical analysis of concrete structures and component optimization design.

关 键 词：隧道衬砌 纤维混凝土 抗裂性能 数值分析 

分 类 号：TU528[建筑科学—建筑技术科学]