·1196 ·
砖石古塔是我国高层古建筑的杰出代表
, 砖石材
料的脆性特征决定了其抗震性能不佳
, 加之古代砌筑
砂浆的强度均不高
, 受风化作用比较严重
, 抗拉
、 抗
剪
、 抗弯能力
均 较低
。 在汶川地震
中
,
30座砖石古
塔均被摧毁,
被 震损的砖石古塔裂缝多数为剪切裂缝,
后续加固工作多采用灌浆
+围 箍法。
结 合相关研究,
本 文提出了用灌浆与围箍钢筋复合加固的增强措施
,
通过试验及有限元模拟对其抗震性能进行研究
, 为推
广应用提供科学依据。
1 低周反复试验
1.1 试验概况
根 据
JGJ/T 101 —2015 《建
筑 抗震
试 验方法
规
程
》 的要求
, 参照四川德阳某砖石古塔第三层
, 在
砖石古塔灌浆与围箍加固的抗震性能研究
呼梦洁 1,2 , 张苏俊 1, 李胜才 2, 俞君宝 1
(1.
扬州工业职业技术学院,225127 ,江苏扬州;2.
扬州大学建筑工程学院,225009 ,江苏扬州)
摘 要 : 为进一步研究汶川地震中震损砖石古塔灌浆围箍加固修复后的抗震性能
, 以德阳某砖石古塔的
第三层为原型
, 按缩尺比例砌筑两个有楼板的墙筒
, 模拟地震作用使其震损
, 采用灌浆
+围 箍法进行加固
。
对 其进行低周反复试验
, 试验结果表明
: 采用灌浆与围箍加固能显著提高砌体墙的耗能能力及整体性
。 通过
有 限元软件
A NSYS Workbench对试验进行了数值模拟
, 结果与试验结果比较吻合
。 在试验数据基础上提出
灌浆与围箍加固的抗剪承载力预估公式,为后续灌浆与围箍加固抗剪承载力的计算提供了依据。
关键词: 低周反复试验;灌浆加固;抗震性能;震损
中图分类号: TU 746 文献标志码: B 文章编号: 1000 –4726(2017)11 –1196 –04
RESERCH ON SEISMIC BEHAIOR OF MASONRY PAGODA STRENGTHENED BY GROUTING
AND SURROUNDING-HOOP
HU Meng-jie 1,2, ZHANG Su-jun 1, LI Sheng-cai 2, YU Jun-bao 1
(1.Yangzhou Polytechnic Institute, 225127, Yangzhou, Jiangsu, China; 2.College of Architectural Science and Engineering of Yangzhou
University, 225009, Yangzhou, Jiangsu, China)
Abstract: In order to study the seismic performance of damaged masonry pagodas strengthened
by grouting and surrounding-hoop reinforcement in the WenChuan earthquake. Two models with a floor
by using the third layer of DeYang as the prototype which built according to distribution rule, and
simulated seismic action make its shock damage, then strengthened by grouting and surrounding-hoop, to
test it by low cyclic experiment. Results showed that: the energy dissipation capacity and integrity of
masonry wall which strengthened by grouting and surrounding-hoop were significantly improved. Through
commercial software A NSYS Workbench simulate it. The results showed that finite element analysis
results were in good agreement with experiment results. On the basis of experimental data, putting
forward the bearing capacity formula of masonry wall which strengthened by grouting and surrounding-
hoop, that basis for bearing capacity calculation.
Keywords: low cyclic experiment; grouting; seismic performance; seismic damage
收稿日期: 2017 –07–02
基金项目 :国家自然科学基金(51211130119 )
作者简介: 呼 梦洁 (1987 — ) , 女,安 徽 亳州 人,
讲 师 ,e-mail :
463824581@qq.com.
实 验室内砌筑两个简化的单层砖砌体
砖石古塔灌浆与围箍加固的抗震性能研究(论文).pdf