Study on the accuracy of practical functions for R/C wall by a developed database of experimental test results
Study on the accuracy of practical functions for R/C wall by a developed database of experimental test results
复制标题
利用开发的实验测试结果数据库研究R/C墙实用功能的准确性
DOI：
10.1007/s10518-019-00691-4
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发表时间：
2019
影响因子：
4.6
通讯作者：
A. Tasai
中科院分区：
文献类型：
--
作者：
K. Kusunoki;M. Sakashita;T. Mukai;A. Tasai
在现代实际结构设计中，推覆分析被广泛用于评估结构在安全极限状态下的倒塌模式和构件受力。为了保证推覆分析的准确性，需要对包括剪力墙在内的所有构件进行适当的建模。因此，预测初始刚度、裂纹强度、屈服或极限强度、屈服点的刚度退化比、极限变形和极限抗剪强度的函数必须精确到可以接受的程度。虽然已经提出了几个理论、半理论和经验函数，并在实践中普遍使用，但这些函数的准确性尚未得到全面验证。国土交通省和建筑研究所从2012年到2015年在日本启动了一个项目，开发了1975年至2013年进行的507次钢筋混凝土墙实验数据的综合数据库，以确认功能的准确性。本文给出了用这些函数预测的值与数据库的实验结果的比较。结果发现：(i)预测的初始刚度往往高于实验试验结果，（ii）预测的极限抗剪强度通常小于实验试验结果，其准确性似乎取决于边界柱的存在和开口的存在，以及（iii）与屈服和极限抗剪强度相对应的预测变形往往小于实验试验结果。
Pushover analysis is widely used in modern practical structural design to evaluate collapse modes and member forces at the safety limit state. All members, including shear walls, need to be modeled properly to assure the accuracy of pushover analysis. As such, functions to predict initial stiffness, crack strength, yield or ultimate strength, stiffness degrading ratio to the yielding point, ultimate deformation, and ultimate shear strength must be acceptably accurate. While several theoretical, semi-theoretical, and empirical functions have been proposed and are commonly used in practice, the accuracies of these functions have not been verified comprehensively. The Ministry of Land, Infrastructure, Transportation and Tourism and the Building Research Institute launched a project in Japan from 2012 to 2015 to develop a comprehensive database of experimental data from 507 reinforced concrete wall experiments conducted between 1975 to 2013 to confirm the accuracy of the functions. In this paper, the comparisons between values predicted using the functions against experimental results from the database are presented. It was found that (i) the predicted initial stiffness tends to be higher than that from experimental tests, (ii) the predicted ultimate flexural and shear strengths were generally smaller than those from experimental tests, and its accuracy appears to be dependent on the presence of boundary columns and the existence of openings, and (iii) the predicted deformation corresponding to yield and at ultimate shear strength tends to be smaller than those from experimental tests.