Predicting the influence of restraint on reinforced concrete panels using finite element models developed from experimental data
Predicting the influence of restraint on reinforced concrete panels using finite element models developed from experimental data
复制标题
使用根据实验数据开发的有限元模型预测约束对钢筋混凝土板的影响
DOI：
10.1080/15376494.2023.2248600
复制
发表时间：
2023
影响因子：
2.8
通讯作者：
Shehzad M
中科院分区：
文献类型：
--
作者：
Shehzad M
外部约束混凝土的体积变化，即温度效应和收缩，可能会导致拉应力，并最终开裂。这种开裂风险是通过提供钢筋来控制/减轻的，这假设了在不同类型的约束条件下对开裂模式的正确理解。钢筋混凝土(RC)构件可以在其边缘或末端被约束，或者在许多情况下两者的组合。现有的指导方法大多是基于端部约束构件的，但也被应用于预测边缘约束下的行为。研究人员已经发现，与边缘约束和末端约束相关的开裂机制截然不同。为此，利用一项旨在了解边缘约束钢筋混凝土墙性能的试验研究结果来验证有限元模型。随后，利用该有限元模型对不同高宽比、不同约束形式的墙体进行了参数研究。裂缝的形式、宽度和程度似乎在很大程度上取决于约束的类型和墙体的高宽比。例如，联合约束的影响在高宽比小于4的墙体中更为显著。这项研究提供了明确的证据，说明为什么需要进行类似的研究，以支持工程师设计防止由于约束而产生的裂缝。
Externally restraining volume changes of concrete, that is, thermal effects and shrinkage, may result in tensile stresses and eventually cracking. Such cracking risk is controlled/mitigated by the provision of steel reinforcement, which presumes a correct understanding of the cracking patterns under different types of restraint conditions. Reinforced concrete (RC) members may be restrained at their edges or end, or in many cases a combination of the two. Existing guidance on the subject is mostly based on end restrained members, however, it is applied to predict the behavior under edge restraint too. Researchers have identified that the mechanisms of cracking associated with edge and end restraints are quite different. To this purpose, findings from an experimental investigation aiming to understand the behavior of edge restrained RC walls were utilized to validate a finite element (FE) model. Subsequently, this FE model was used to parametrically study walls having different aspect ratios and subjected to different forms of restraint. Cracking patterns, widths, and extent appeared to greatly depend on the type of restraint and wall aspect ratio. The influence of combined restraint, for instance, was found to be more significant in walls with aspect ratio less than 4. The study provides clear evidence on why similar studies, are needed to support engineers in designing against cracking due to restraints.
登录
查看更多内容
横向荷载基础约束钢筋混凝土墙的裂缝发展
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
M. Micallef;R. Vollum;B. Izzuddin
通讯作者：
B. Izzuddin
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
M. R. Kianoush;M. Acarcan;A. Ziari
通讯作者：
A. Ziari
具有组合底座和端部约束的墙壁开裂
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
M. Micallef;R. Vollum;B. Izzuddin
通讯作者：
B. Izzuddin
对钢筋混凝土墙施加的荷载效应在其底部受到限制
DOI：
10.1680/jstbu.17.00179
发表时间：
2020
期刊：
Proceedings of the Institution of Civil Engineers - Structures and Buildings
影响因子：
--
作者：
Shehzad M
通讯作者：
Shehzad M
边缘约束 RC 墙的开裂性能评估
影响因子：
3.2
作者：
Elwakeel A
通讯作者：
Elwakeel A