Experimental study on seismic performance of fire-exposed perforated brick masonry wall

2018 ◽  
Vol 180 ◽  
pp. 77-91 ◽  
Author(s):  
Jin Zhang ◽  
Hao Ma ◽  
Cheng Li ◽  
Qingfeng Xu ◽  
Weibin Li
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Masonry Wall ◽  
Brick Masonry

scholarly journals Experimental Study on Seismic Performance of Old Masonry Walls

2020 ◽  
Vol 20 (6) ◽  
pp. 151-157
Author(s):  
Hoijin Kim ◽  
Zheongzun Yi ◽  
Jongsup Park ◽  
Junsuk Kang
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Initial Crack ◽  
Masonry Wall ◽  
Masonry Structure ◽  
Risk Level ◽  
Control Group ◽  
Masonry Walls ◽  
Masonry Building ◽  
Expected Increase

Due to the increase in the frequency and intensity of earthquakes and the number of old buildings and in Korea, there is an expected increase in the damage to life and property. Therefore, we intend to derive an indicator to evaluate the risk level by conducting a seismic test on old buildings. An initial crack was generated in the masonry structure to reflect the deterioration. The effect of the deterioration on the building was subsequently analyzed by comparing it with the uncracked control group. As a result, the masonry wall, which was the specimen, satisfied the seismic performance, but local failure occurred along the initial crack in the specimen considering the aging. The safety was significantly decreased due to the occurrence of additional cracks. This demonstrates that the cracks caused by the aging of the masonry building greatly damaged the seismic performance of the building.

The Seismic Performance Analysis of Brick Masonry Wall between Windows with Central Reinforced Concrete Constructional Columns

2012 ◽  
Vol 193-194 ◽  
pp. 1221-1225
Author(s):  
Jing Yang ◽  
Wen Fang Zhang
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Shear Failure ◽  
Reaction Force ◽  
Horizontal Displacement ◽  
Masonry Wall ◽  
Shear Capacity ◽  
Brick Masonry ◽  
Displacement Curve ◽  
Element Analysis

To research the seismic performance and failure mode of longitudinal independent brick masonry wall between or not between windows with setting central reinforced concrete constructional columns under the lateral function and vertical load, this paper used ABAQUS finite element analysis software to model the walls between or not between windows and be in stress analysis, obtaining the reaction force- displacement curve of loading location and the maximum horizontal displacement at the top of wall. Calculate and compare the shear strength and flexural capacity of walls. The results show that the brick masonry wall between windows with central constructional columns occurred shear failure, but the wall without windows occurred flexural failure. And compared with the wall between windows, the ductility increased, the shear capacity reduced and the seismic performance improved. Propose that can set up a isolated seam between the windowsill wall and longitudinal wall invented by Zhang Wenfang etc., and turn window wall to wall without windows to improve the seismic behavior of wall between windows.

scholarly journals Experimental Research on Seismic Performance of Damaged Brick Walls Strengthened with Embedded Horizontal Steel Bars

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Liu Tingbin ◽  
Jia Rubo ◽  
Pei Xianke ◽  
Zhang Jiawei ◽  
Zhao Jianchang
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Masonry Wall ◽  
Shear Capacity ◽  
Brick Masonry ◽  
Reconstruction Process ◽  
Skeleton Curve ◽  
Aspect Ratios ◽  
Steel Bars ◽  
Energy Dissipation Capacity

Six brick masonry specimens (two unreinforced specimens, two reinforced specimens, and two specimens reinforced after being damaged), which have different aspect ratios, were tested under low-frequency cyclic loading. The seismic performances of these specimens, including failure characteristics, deformation capacity, carrying capacity, energy dissipation capacity, hysteresis characteristics, and stiffness degradation, were analyzed. The following results were obtained: the ductility of the damaged walls could be significantly improved after they were reinforced with embedded horizontal steel bars; the ultimate shear capacity of the damaged brick masonry walls with the aspect ratios of 1.8 and 0.5 was improved by 6.8% and 4.7%, respectively; the displacement corresponding to the ultimate bearing capacity was close to that of the unreinforced brick masonry wall; the hysteresis loop of the reinforced wall became plumper and encompassed a larger area; after the ultimate load was reached, a clear yielding platform appeared in the skeleton curve of the reinforced wall; the reinforced wall exhibited good ductility, after entering plastic stage; the energy dissipation capacity of the reinforced wall was significantly greater than that of the unreinforced wall. In conclusion, the seismic performance of the damaged brick masonry wall can be improved by embedding horizontal steel bars, and this reinforcing method can be applied in the postseismic reconstruction process.

Experimental study on seismic performance of strengthening masonry wall using hybrid fiber-reinforced reactive powder concrete

2021 ◽  
pp. 875529302098801
Author(s):  
Xin Wang ◽  
Qun Xie ◽  
Zhenli Wu ◽  
Fanyang Bu ◽  
Fei Wang
Keyword(s):  
Experimental Study ◽  
Seismic Performance ◽  
Structural Integrity ◽  
Masonry Wall ◽  
Reactive Powder Concrete ◽  
Masonry Walls ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Confined Masonry ◽  
Reactive Powder

An experimental study was conducted to investigate the seismic performance of masonry walls strengthened using hybrid fiber-reinforced reactive powder concrete (HyFRRPC) as a coating. The proposed reinforcement technique was employed to improve the overall strength and structural integrity of the confined masonry wall. In order to guarantee the composite action between the masonry substrate and the coating material, material tests were conducted to achieve an optimal mixture for the HyFRRPC. Then, six full-scaled confined masonry specimens strengthened by HyFRRPCs with varied strengthening configurations were tested under in-plane quasi-static horizontal loading. The test and analysis results indicated that the proposed HyFRRPC-strengthening technique can effectively improve the lateral carrying capacity, displacement ductility, and energy dissipation capacity of masonry walls, and provide an optimal reinforcement. Finally, a simplified analytical model was also proposed for practical application.

The Seismic Performance Analysis of Brick Masonry Wall between Windows

2014 ◽  
Vol 1008-1009 ◽  
pp. 1242-1245
Author(s):  
Fei Wen ◽  
Wen Fang Zhang
Keyword(s):  
Bearing Capacity ◽  
Seismic Performance ◽  
Cyclic Load ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Load Test ◽  
Destruction Process ◽  
Finite Element Software ◽  
Engineering Significance ◽  
Process Ductility

To research the brick masonry wall between windows under the low cyclic load test. Combining with ABAQUS finite element software simulated the wall between windows. Analyze the destruction process, ductility and seismic performance of the wall between windows. Explore the beneficial influence on the wall between windows which under the pressure. The results of study show that the brick masonry wall between windows occurred flexural failure.With the increase of pressure, the ductility of Brick masonry wall between windows will be decreased. But the yield load, maximum bearing capacity and limit bearing capacity is improved obviously. When compared 0.3MPa,the maximum bearing capacity under 0.4MPa, 0.5MPa, 0.6MPa increased by 8.3% , 16.4% and 23.9%. The seismic performance was improved. It had good engineering significance in practice.

Loading Height on Reinforced Brick Masonry Wall's Failure Mode and Seismic Performance with Finite Element Analysis Method

2013 ◽  
Vol 788 ◽  
pp. 546-549
Author(s):  
Zhi Heng Wu ◽  
Wen Fang Zhang
Keyword(s):  
Finite Element ◽  
Failure Mode ◽  
Seismic Performance ◽  
Shear Failure ◽  
Element Model ◽  
Masonry Wall ◽  
Brick Masonry ◽  
Element Analysis ◽  
Plastic Energy ◽  
Deformation Ability

Loading height is a key factor that affects brick masonry wall specimens failure mode and seismic performance. To explore reinforced brick masonry walls failure pattern and seismic performance in different loading height, reinforced brick masonry wall MARC finite element model with 1.44 aspect ratio is set up to analyze its failure mode and seismic performance at constant vertical stress and different loading height. Results are as follows: bending failure happens more easily at higher loading height and shear failure happens more easily at lower loading height; wall specimen shows better deformation ability, elastic and plastic energy dissipation capacity but lower ultimate bearing capacity at higher loading height.

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