摘要
我国砌体结构历史震害严重,为对打包带加固砌体结构的抗震性能进行分析,基于Pushover方法及Abaqus有限元软件,探索简单有效的抗震性能评估方法。首先,以两栋具有实际震害的砌体结构作为研究对象,运用Abaqus软件建立三维有限元模型,并进行Pushover分析,通过与实际震害及动力时程分析结果进行对比分析,验证了Pushover方法用于砌体结构抗震性能评估的可行性。然后,以其中一栋单层砌体结构为对象,进一步研究打包带加固对结构抗震性能的影响。结果表明:多遇地震和设防地震作用下,打包带加固后结构的层间位移角有所减小,打包带发挥了一定作用,但增强效果不够明显;然而,在罕遇地震作用下,打包带发挥了明显作用,结构的抗震性能有明显增强。作为一种简单、廉价、有效的抗震加固方法,打包带加固可以用于村镇砌体结构的抗震加固,特别是可以有效提高砌体结构的抗倒塌能力。
The masonry structures suffered severe earthquake damage in history of China.In order to analyze the seismic performance of the reinforced masonry structure with polypropylene bands(PP-bands),based on the Pushover method and Abaqus finite element software,a simple and effective method is explored for evaluating seismic performance.Firstly,two masonry structures with actual earthquake damage were used as research objects.Abaqus software was used to establish a three-dimensional finite element model and Pushover analysis was performed,by comparing with the actual seismic damage with dynamic time history analysis results,the feasibility of the Pushover method for evaluating the seismic performance of masonry structures is verified.Then,choosing one of the single-story masonry structures as an object to further study the influence of the reinforcement of PP-bands on the seismic performance of the structure.The results show that under frequent and fortification earthquakes,the inter-layer displacement angle of the reinforced structure with the PP-bands is reduced,and PP-bands play a certain role but its enhancement effect is not obvious enough.However,under rare earthquakes,PP-bands have played a significant role,and the seismic performance of the structure has been significantly enhanced.As a simple,cheap and effective method of seismic reinforcement,PP-bands reinforcement can be used for seismic reinforcement of masonry structures of villages and towns,in particular,it can effectively improve the collapse resistance of masonry structures.
作者
周强
杨凌宇
赵文洋
ZHOU Qiang;YANG Lingyu;ZHAO Wenyang(School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China)
出处
《自然灾害学报》
CSCD
北大核心
2020年第2期35-43,共9页
Journal of Natural Disasters
基金
国家自然科学基金资助项目(51608249,51968047)
江西省重点研发计划项目(20161BBG70058)。
关键词
砌体结构
PUSHOVER分析
抗震性能评估
打包带加固
三维有限元模型
masonry structure
Pushover analysis
seismic performance evaluation
PP-bands reinforcement
three-dimensional finite element model
