|Table of Contents|

Calculation Model of Equivalent Lateral Stiffness of Masonry Wall Under Rotational Deformation Mechanism(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2022年06期
Page:
102-112
Research Field:
结构工程
Publishing date:

Info

Title:
Calculation Model of Equivalent Lateral Stiffness of Masonry Wall Under Rotational Deformation Mechanism
Author(s):
GUO Meng1;  FAN Wang-sheng2;  SUN Jing2
(1. Institute of Building Structures, China Academy of Building Research, Beijing 100013, China; 2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)
Keywords:
masonry structure;  masonry wall;  rotational deformation;  skeleton curve;  equivalent lateral stiffness;  equivalent height to width ratio;  calculation model
PACS:
TU362
DOI:
10.19815/j.jace.2021.07041
Abstract:
In order to study the equivalent lateral stiffness of masonry wall under rotational deformation mechanism, the characteristics of masonry wall skeleton curve under rotational deformation mechanism were analyzed and the equivalent height to width ratio parameter of masonry wall was defined. Based on the principle that the series connection stiffness is equal to the stiffness of the rectangular facade, the calculation formula of the equivalent height to width ratio of the rotating main body of the non-rectangular facade was deduced. Based on the stiffness attenuation law of rotational wall in elastic-plastic stage, the stiffness attenuation coefficient α and the influence coefficient of the height to width ratio of the rotating main body β were obtained by fitting the experimental data. Finally, the equivalent lateral stiffness calculation model of masonry wall under rotational deformation mechanism was established and verified by literature data. The results show that in the algorithm of rotational deformation mechanism, the greater the height to width ratio of the wall limb, the lower the equivalent lateral stiffness and the smaller the seismic action. In the algorithm of rotational deformation mechanism, the magnitude of earthquake action distributed by masonry wall is related to the direction, and the percentage of earthquake action of the same wall limb is different in different earthquake direction. Using the equivalent lateral stiffness of masonry wall under rotational deformation mechanism to check the seismic resistance of masonry structure is helpful to find the weak link of masonry structure under the existing seismic design.

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Last Update: 2022-12-20