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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第6期    总第250期    2015年6月

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文章编号:1672-7207(2015)06-2274-11
水平荷载作用下煤矸石空心砖墙受力性能影响因素分析
卢林枫1,张亚平2

(1. 长安大学 建筑工程学院,陕西 西安,710061;
2. 广东华方工程设计有限公司 四川分公司 四川 成都,610084
)

摘 要: 在已有煤矸石空心砖墙抗震试验的基础上,利用ANSYS软件,建立试验有限元模型,并与试验结果进行对比分析,验证有限元模型的正确性。在试验有限元模型正确的前提下,结合工程实例,确定模型尺寸,同时考虑竖向压力、砂浆强度等级、洞口尺寸及位置变化等参数对水平荷载作用下煤矸石空心砖墙体受力性能的影响,设计3个系列23个试件,对每个试件在单调荷载和低周反复荷载作用下的受力性能进行有限元模拟分析。研究结果表明:竖向压力是影响空心砖墙体的主要因素,墙体的承载能力随竖向压力的增加而提高,墙体的延性及破坏形式则随竖向压应力与墙体平均抗压承载力的比值不同而表现出不同的形式;砂浆强度等级提高,墙体的承载能力随之提高,但延性减小;洞口大小及位置也是影响墙体受力性能的主要因素。墙体的极限承载力、延性和刚度随洞口尺寸的增大而减小;当洞口居中布置时,墙体的承载能力最小,而延性较好;当门洞靠边布置时,墙体的承载能力提高,延性减小。

 

关键字: 煤矸石空心砖墙;极限承载力;延性系数;滞回性能

Analysis on mechanical behavior influence factor of gangue hollow brick wall under the horizontal loads
LU Linfeng1, ZHANG Yaping2

1. School of Civil Engineering, Chang’an University, Xi’an 710061, China;
2. Guangdong China Engineering Design Co Ltd., Sichuan, Chengdu 610084, China

Abstract:On the basis of existing seismic tests of gangue hollow brick wall, the finite element model was established by using ANSYS, and the analysis results were compared with test results to verify the correctness of the finite element model. Many parameters were considered in exploring the impacts of parameter variations on the mechanical behaviors of gangue hollow brick walls under horizontal loads, such as the vertical pressure, the strength classes of mortar, size of openings and position of openings. Twenty-three specimens of three series were designed for finite element simulation analysis to research the mechanical behaviors of each specimen under monotonic and low cyclic loads. The results show that the vertical pressure is the main influencing factor on mechanical behavior of hollow brick wall. The bearing capacity of the wall improves with the increase of the vertical pressure, but the ductility and failure mode of the walls show different forms with the ratio change of vertical compressive stress and average compressive bearing capacity. The bearing capacity of the wall improves with the increase of the mortar strength, but the ductility decreases. The size and position of the structural opening are also the main influencing factor on mechanical behavior of hollow brick wall. The ultimate bearing capacity, rigidity and ductility of the wall decrease with the increase of the structural opening size. When the structural opening is arranged at the center, the bearing capacity is the minimum, and the ductility is better. When the structural opening is arranged aside, the bearing capacity of the wall increases, and the ductility decreases.

 

Key words: gangue hollow brick wall; ultimate bearing capacity; ductility factor; hysteretic behavior

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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