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Study on Hysteretic Behavior of AAC Masonry Infill Wall with Circular-arc Openings at Corners Embedded in Steel Frame(PDF)

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

Issue:
2022年01期
Page:
77-86
Research Field:
钢结构
Publishing date:

Info

Title:
Study on Hysteretic Behavior of AAC Masonry Infill Wall with Circular-arc Openings at Corners Embedded in Steel Frame
Author(s):
YU You-sheng;  GUO Ya-nan
(School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China)
Keywords:
autoclaved lightweight aerated concrete;  infill wall;  steel frame;  interaction;  circular-arc opening at the corner;  hysteretic behavior
PACS:
TU398
DOI:
10.19815/j.jace.2020.12062
Abstract:
Based on the principle that setting openings at the corners of the infill wall could weaken the tension(compression)band, a series of specimens of infill wall with circular-arc openings at the corners embedded in steel frame were designed, including one pure steel frame, one autoclaved lightweight aerated concrete(AAC)masonry infilled steel frame without opening, nine AAC masonry infilled steel frame with different sizes circular-arc openings. The finite element analysis of each specimen was carried out by ABAQUS software. The influence of circular-arc openings at the corners of the infill wall on the hysteretic behavior, load-bearing capacity, ductility, stiffness degradation, strength degradation and energy dissipation capacity of steel frames were studied. The results show that the circular-arc openings at the corners of the infill wall can weaken the contribution of AAC masonry infill wall to the load-bearing capacity of steel frame, effectively delay the failure of the infill wall, reduce the additional stiffness of the infill wall for the steel frame structures, and delay the stiffness degradation rate of AAC masonry infill wall embedded in steel frame.The circular-arc openings can also change the failure mode of the AAC masonry infill wall. According to the results of finite element analysis, it is suggested that the arc length of circular-arc openings is πl/2 and the radius l is 1/10-1/7 of the height of AAC masonry infill wall.

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Last Update: 2021-02-10