A nonlinear macromodel for simulating the in-plane behavior of unreinforced masonry (URM) infilled frames
A nonlinear macromodel for simulating the in-plane behavior of unreinforced masonry (URM) infilled frames
复制标题
用于模拟无筋砖石 (URM) 填充框架的面内行为的非线性宏观模型
DOI：
10.1007/s10518-022-01488-8
复制
发表时间：
2022
影响因子：
4.6
通讯作者：
Nakano Yoshiaki
中科院分区：
文献类型：
--
作者：
Adnan S. M. Naheed;Matsukawa Kazuto;Haga Yuji;Islam Md Monzurul;Nakano Yoshiaki
本文介绍了在非线性宏观模型中应用多个轴向弹簧平行排列的方法来捕捉旋转作用下填充框架的面内旋转行为，并预测旋转作用下柱和墙之间的共同轴力。此外，所建立的宏模型可以模拟边界框架和填充体的多种破坏模式。在填充框架的数值模拟中，采用两种单元的系统布置，每一种单元具有一个剪切弹簧和一个轴向弹簧，来代替砌体填充板。根据填充框架的几何特性和钢筋拉伸试验、砌体棱柱和混凝土圆柱体压缩试验等简单材料试验结果，推导了轴向弹簧和剪切弹簧的本构模型。本文简要介绍了1/2.5比例2层2槽无增强砖砌体填充框架试件（BF + MIW试件）的实验研究和数值模拟，重点关注发展中国家（如孟加拉国）现有脆弱建筑的行为。在BF + MIW试件中观察到一种独特的破坏模式：侧加载侧柱的贯通剪切破坏，梁墙界面同时滑动。所建立的宏观模型考虑了这种失效模式。采用宏观模型对另一非钢筋混凝土砌块砌体填充的钢筋混凝土框架试件进行了分析。分析结果有效地近似了填充框架的整体行为，并预测了旋转作用下柱的轴力。
This study introduces the application of parallel arrangement of multiple axial springs in a nonlinear macromodel to capture the in-plane rotational behavior and predict shared axial forces between column and wall of an infilled frame under rotation. In addition, multiple failure mode of both boundary frame and infill can be simulated using the developed macromodel. A systematic arrangement of two types of elements, each with one shear spring and one axial spring, is used to replace the masonry infill panels in the numerical modeling of infilled frames. The constitutive models of the axial and shear springs are derived using the geometric properties of the infilled frame and the results of simple material tests such as tension tests of rebar and compression tests of masonry prisms and concrete cylinders. A brief summary of the experimental study and numerical simulation of a 1/2.5-scale 2-story 2-bay unreinforced brick masonry infilled frame specimen (the BF + MIW specimen) is presented, focusing on the behavior of existing vulnerable buildings in developing countries (e.g., Bangladesh). A distinct type of failure mode was observed in the BF + MIW specimen: snap-through shear failure of the column on the lateral loading side with simultaneous sliding at the beam-wall interface. The developed macromodel considers this failure mode. Another reinforced concrete frame specimen with unreinforced concrete block masonry infill is analyzed using the macromodel. Analysis results effectively approximate the overall behavior of the infilled frames and predict axial forces on columns under rotation.
影响因子：
4.1
作者：
M. Santhi;G. Knight;K. Muthumani
通讯作者：
K. Muthumani
钢筋混凝土框架与砌体填充墙相互作用的研究
DOI：
--
发表时间：
1970
期刊：
影响因子：
--
作者：
A. E. Fiorato;M. Sozen;W. Gamble
通讯作者：
W. Gamble
砌体墙填充RC框架平面内行为的实验观察；
影响因子：
4.6
作者：
H. Alwashali;Yuta Torihata;Kiwoong Jin;M. Maeda
通讯作者：
M. Maeda