Abstract

This paper presents a detailed numerical investigation of behavior of cylindrical tube-shaped textile-reinforced cementitious composites (TRCCs) under monotonic lateral compression loading, and experimental verification. Effects of different thickness and number of layers, different textile materials on behavior of cylindrical tube-shaped TRCCs are investigated numerically. Numerical results are obtained by finite element (FE) simulation. The deformations and damages of TRCC tubes have also been investigated and analyzed with material models identified in the FE simulation. As results of numerical analysis, load-displacement curves of TRCC tubes, basic mechanism of their deformations, and the effects of textile material and the number of TRCC layers on the deformation behavior and load-carrying capacities of the TRCC tubes were presented. In this study, it was found that TRCC tubes could be an alternative to conventional pipes due to ductility, manufacturing feasibility according to their desired load-carrying capacity, energy absorption and ductility. Analytical solution based on an energy method was also presented to estimate the strength of different type of TRCC tubes. The results obtained from the FE simulation were compared with test data of monotonic lateral compression experiment for verification. Finally, parametric analysis was conducted using geometrical variables and the effects on tube strengths were examined.

摘要

本文对圆柱形管状织物增强水泥基复合材料 (TRCC) 在单调横向压缩载荷下的行为进行了详细的数值研究，并进行了实验验证。数值研究了不同厚度和层数、不同纺织材料对圆柱管状 TRCC 行为的影响。通过有限元 (FE) 模拟获得数值结果。还使用有限元模拟中确定的材料模型对 TRCC 管的变形和损坏进行了调查和分析。作为数值分析的结果，给出了 TRCC 管的载荷-位移曲线、变形的基本机制，以及纺织材料和 TRCC 层数对 TRCC 管的变形行为和承载能力的影响。在这项研究中，发现 TRCC 管可以替代传统管道，因为它具有延展性、根据其所需的承载能力、能量吸收和延展性制造的可行性。还提出了基于能量法的解析解来估计不同类型 TRCC 管的强度。将有限元模拟得到的结果与单调横向压缩实验的试验数据进行比较验证。最后，使用几何变量进行参数分析，并检查对管强度的影响。还提出了基于能量法的解析解来估计不同类型 TRCC 管的强度。将有限元模拟得到的结果与单调横向压缩实验的试验数据进行比较验证。最后，使用几何变量进行参数分析，并检查对管强度的影响。还提出了基于能量法的解析解来估计不同类型 TRCC 管的强度。将有限元模拟得到的结果与单调横向压缩实验的试验数据进行比较验证。最后，使用几何变量进行参数分析，并检查对管强度的影响。