Abstract
Masonry structure is the main form of Chinese urban and rural housing construction structure. And heavy casualties and huge economic losses are caused by the damages of masonry structures in the previous destructive earthquake. So the failure modes of masonry structures are analyzed in the paper. ABAQUS software was used; and the Xuankou High School Student Dormitory of masonry structure in Yingxiu town, severely damaged under the Wenchuan earthquake, was taken for example. The influence of the stiffness ratio of pier between windows and spandrel on the failure modes of masonry structures is discussed. The results show that the failure modes in the earthquake could be changed by controlling the stiffness ratio. Suitable stiffness ratio helps proper design of masonry structures.
Highlights
Since the 5.12 Wenchuan earthquake in Sichuan, China, with a total of 7.79 million houses collapsed and 24.5 million houses damaged, by investigating the building structure damaged, scholars found that many of severe damaged or collapsed buildings were masonry structure building in earthquake disaster due to the unreasonable structural design, the poor construction quality, and so on
The structural failure mode is gradually transformed from heavy damage of pier between windows and spandrel into the damage degree of pier between windows significantly lighter than that of
The structural failure mode is gradually transformed from heavy damage of pier between windows and spandrel into the damage degree of pier between windows significantly lighter than that of spandrel
Summary
Since the 5.12 Wenchuan earthquake in Sichuan, China, with a total of 7.79 million houses collapsed and 24.5 million houses damaged, by investigating the building structure damaged, scholars found that many of severe damaged or collapsed buildings were masonry structure building in earthquake disaster due to the unreasonable structural design, the poor construction quality, and so on. It is found that there are different degrees of damage on many masonry structures buildings, they did not collapse. This phenomenon causes people to pay attention to studies on seismic performance and structural failure mode. Previous studies of the masonry structure damage in the earthquake are most focused on the survey of damage phenomena and individual member’s damage [1,2,3,4,5,6]; few scholars study the overall failure mode in destructive earthquake [7,8,9] and failure criteria for masonry [10,11,12,13]. There is a more in-depth and quantitative description of the failure mode of masonry structures, such as the impact of the ratio of the horizontal lateral stiffness of pier between windows and the vertical stiffness of spandrel on the failure mode; and the analysis gives some meaningful conclusions
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