Experimental observations on the in-plane behaviour of masonry wall infilled RC frames; focusing on deformation limits and backbone curve
Experimental observations on the in-plane behaviour of masonry wall infilled RC frames; focusing on deformation limits and backbone curve
复制标题
砌体墙填充RC框架平面内行为的实验观察；
DOI：
10.1007/s10518-017-0248-x
复制
发表时间：
2018
影响因子：
4.6
通讯作者：
M. Maeda
中科院分区：
文献类型：
--
作者：
H. Alwashali;Yuta Torihata;Kiwoong Jin;M. Maeda
框架与填充砌体的强度比和刚度比是影响填充砌体抗震性能的主要参数。这些参数对抗震能力的影响在强度、刚度和变形方面在不同的设计规范和过去的文献中有很大的差异。本研究主要探讨不同强度钢筋混凝土框架内无筋砌体填充墙的平面内受力性能。在本研究的第一部分中，使用静态循环加载方案对具有不同RC框架和相同砌体填充墙的两个½比例样本进行了测试。主要目的是研究改变框架强度对抗震能力的影响：强度，刚度和变形。试验结果表明，随着框架抗剪强度与砌体抗剪强度之比的增大，砌体填充墙在强度和避免砌体填充物突然脆性行为方面有很大的改善。然而，不同的框架强度并没有显着影响初始刚度和层间位移在最大强度。在本研究的第二部分中，进行了调查的变形限制的砌体填充RC框架和各种参数的影响，从最近的许多实验测试收集的数据的基础上。基于这些试验结果，砌体填充的变形极限被发现是成正比的压缩棱柱体强度的砌体填充和框架的剪切强度的比值的砌体填充。纵横比的影响表现出很大的变化，这是很难得出结论的影响程度的变形。提出了一种基于试验数据的简化计算方法，该方法可以通过简单的手工计算，根据框架强度比来估算骨架曲线，并能较好地估算峰后抗侧力退化斜率。这种方法是有用的初步设计过程中，以帮助执业工程师了解填充钢筋混凝土框架预期的一般行为。
The ratio of frame strength and stiffness to masonry infill are major parameters that influence the seismic capacity of masonry infill. The influence of such parameters to seismic capacity in terms of strength, stiffness and deformation has significant variations between different design codes and past literature on the topic. This study focused on the in-plane behaviour of unreinforced masonry infill walls installed in reinforced concrete (RC) frames with different strengths. In the first part of this study, two ½ scale specimens with different RC frames and identical masonry infill walls were tested using a static cyclic loading protocol. The main objective was investigating the influence of changing frame strength to seismic capacity in terms of: strength, stiffness and deformation. Results of the presented experiment showed that as the ratio of frame shear strength to masonry shear strength increased, there was great improvement of the masonry infill walls in terms of strength and avoidance of sudden brittle behaviour of the masonry infill. However, varying frame strength did not significantly influence the initial stiffness and story drift at maximum strength. In the second part of this study, an investigation was conducted on the deformation limits of masonry infilled RC frames and the influence of various parameters, based on data collected from many recent experimental tests. Based on these experimental results, the deformation limits of masonry infill were found to be directly proportional to both the compressive prism strength of the masonry infill and the ratio of shear strength of frame to that of the masonry infill. The influence of aspect ratio showed large variation and it is difficult to conclude its level of influence on deformation. A simplified procedure based on experimental data was proposed that can estimate the backbone curve and gave good estimation of the post-peak lateral strength degradation slope based on the ratio of frame strength with simple hand calculation. Such a method is useful in the preliminary design process to help practicing engineers understand the general behaviour expected by infilled RC frames.
DOI：
10.5860/choice.33-0948
发表时间：
1995
期刊：
--
影响因子：
--
作者：
A. Chopra
通讯作者：
A. Chopra