|本期目录/Table of Contents|

[1]李志坚,林友勤,许立英,等.UHPC加固灰缝的两层双跨石砌体结构振动台试验[J].地震研究,2025,(03):507-518.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0053 ]
　LI Zhijian,LIN Youqin,XU Liying,et al.Shaking Table Test of UHPC Reinforced Mortar Joint for Two-storey Double-span Masonry Structure[J].Journal of Seismological Research,2025,(03):507-518.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0053 ]
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UHPC加固灰缝的两层双跨石砌体结构振动台试验(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
期数:
2025年03期
页码:
507-518
栏目:
出版日期:
2025-04-15

文章信息/Info

Title:
Shaking Table Test of UHPC Reinforced Mortar Joint for Two-storey Double-span Masonry Structure
作者:
李志坚1; 林友勤2; 许立英3; 吴应雄2
(1.福州工业园区开发集团有限公司,福建 福州 350100; 2.福州大学 土木工程学院,福建 福州 350108; 3.西南科技大学 土木工程与建筑学院,四川 绵阳 621010)
Author(s):
LI Zhijian1; LIN Youqin2; XU Liying3; WU Yingxiong2
(1.Fuzhou Industrial Park Development Group Co.,Ltd.,Fuzhou 350100,Fujian,China)(2.College of Civil Engineering,Fuzhou University,Fuzhou 350108,Fujian,China)(3.School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)
关键词:
石砌体结构;  抗震加固;  UHPC;  灰缝加固;  振动台试验
Keywords:
masonry structure;  seismic reinforcement;  UHPC;  mortar joint reinforcement;  shaking table test
分类号:
P315.924; TU363
DOI:
10.20015/j.cnki.ISSN1000-0666.2025.0053
摘要:
福建沿海地区既有石砌体结构民宅数量庞大,但由于其材料特性、砌筑方式和结构组成导致结构抗震性能差,需进行加固以提高结构的抗震性能。为了探究超高性能混凝土UHPC加固灰缝对既有石砌体结构抗震性能的整体提升效果,在未加固和采用UHPC加固石墙灰缝两种条件下,对2个1:2缩尺的典型两层双开间石砌体结构模型进行振动台试验,分析了模型加固前后的破坏形态、动力特性、结构响应及其变化规律。试验结果表明:石墙的裂缝均呈现阶梯形发展,门窗洞口附近破坏较为严重,UHPC加固灰缝可以有效延缓裂缝的发展; 随着输入地震波PGA的增大,模型自振频率逐渐减小,相较于未加固模型,加固模型一阶周期基本不变; 在PGA=75 Gal时,未加固模型最大层间位移角为1/162,达到严重破坏,加固模型最大层间位移角较未加固模型减小了78.40%,处于基本完好状态; 而加固模型在PGA=125 Gal时才达到严重破坏,最大层间位移角为1/328,说明采用UHPC加固石墙灰缝能够有效传递水平剪力,延缓结构刚度退化,提高石砌体结构的抗震性能。
Abstract:
There are a large number of existing masonry houses in the coastal area of Fujian province,which have poor seismic performance due to their material properties,masonry methods and structure composition,and need to be strengthened to improve the seismic performance.Ultra-High Performance Concrete(UHPC)reinforced ash joint on the seismic performance of existing stone masonry structure,two 1:2 scale typical two-story double-span stone masonry structure models were carried out shaking table tests under the two conditions of unreinforced and UHPC reinforced stone masonry joints,and the failure forms,dynamic characteristics,structural responses and their change rules before and after reinforcement were analyzed.The test results show that the cracks of the stone wall are all developed in step shape,and the damage near the door and window openings is more serious.UHPC reinforcement of the ash joint can effectively delay the crack development.With the increase of the peak value of the input seismic wave acceleration,the natural frequency of the model decreases gradually.Compared with the unreinforced model,the first-order period of the reinforced model is basically unchanged.When PGA=75 Gal,the maximum inter-layer displacement angle of the reinforced model decreased by 78.40% compared with the unreinforced model,the maximum inter-storey displacement angle of the unreinforced model is 1/162,and the maximum inter-storey displacement angle of the reinforced model is 1/328,while the maximum inter-storey displacement angle of the reinforced model is 1/162,and the maximum inter-storey displacement angle is 1/328.This indicates that the use of UHPC to strengthen the stone wall mortar joint can effectively transfer the horizontal shear force and delay the structural stiffness degradation,improve the seismic performance of stone masonry structure.

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备注/Memo

备注/Memo:
收稿日期:2024-01-07.
基金项目:福建省建设科技研究开发项目(2022-K-18,2023-K-47); 西南科技大学博士基金(23zx7162).
第一作者简介:李志坚(1973-),高级工程师,主要从事工程管理和结构抗震与加固研究.E-mail:1040774514@qq.com.
通信作者简介:吴应雄(1969-),教授,主要从事工程结构抗震、减隔震和结构加固研究.E-mail:WYXFD2006@fzu.edu.cn.
更新日期/Last Update: 2025-04-15