古砖砌体冻融循环下轴心受压试验及超声波测试
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摘要
冻融作用会对寒冷地区的古建筑砖砌体造成不可逆的劣化,抗压强度和弹性模量的变化可以反映砌体的劣化程度。通过气候环境模拟室内对古砖砌体试件进行冻融循环试验,将试验后的砌体试件进行轴心受压试验,结果显示抗压强度和弹性模量随冻融次数的增加先增后减。同时对古砖砌体试件进行超声波测试,得到不同类型测点的超声波波速不同、冻融作用会导致古砖砌体的波速下降;根据测试结果,对超声波波速与古砖砌体弹性模量和抗压强度的关系进行了讨论。
Freeze-thaw action might lead to irreversible deterioration on ancient brick masonry buildings in cold areas. The variation of compressive strength and elastic modulus reflects the deterioration of the masonry.The ancient brick masonry specimens were put in the environmental chamber to carry out freeze-thaw cycle test. After the test,axial compression test was conducted on each masonry specimen. With the growth of freezethaw cycles,compressive strength and elastic modulus firstly increase and then decrease. Ultrasonic test was conducted on ancient brick masonry as well. Its test data indicates that ultrasonic velocity changes in the position of testing point,and freeze-thaw action will result in the reduction of ultrasonic velocity. Besides,this paper discusses the relationship of ultrasonic velocity,compressive strength and elastic modulus.
Freeze-thaw action might lead to irreversible deterioration on ancient brick masonry buildings in cold areas. The variation of compressive strength and elastic modulus reflects the deterioration of the masonry.The ancient brick masonry specimens were put in the environmental chamber to carry out freeze-thaw cycle test. After the test,axial compression test was conducted on each masonry specimen. With the growth of freezethaw cycles,compressive strength and elastic modulus firstly increase and then decrease. Ultrasonic test was conducted on ancient brick masonry as well. Its test data indicates that ultrasonic velocity changes in the position of testing point,and freeze-thaw action will result in the reduction of ultrasonic velocity. Besides,this paper discusses the relationship of ultrasonic velocity,compressive strength and elastic modulus.
引文
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[10]封秋娟,李义宇,李培仁,等.山西云微物理特征的地面观测[J].气候与环境研究,2012,17(6):727-739.Feng Qiujuan,Li Yiyu,Li Peiren,et al.Ground observation of microphysical properties in shanxi province[J].Climatic and Environmental Research,2012,17(6):727-739.(in Chinese)
[11]薛燕妮,徐向舟,王冉冉,等.人工模拟降雨的能量相似及其实现[J].中国水土保持科学,2007,5(6):102-105.Xue Yanni,Xu Xiangzhou,Wang Ranran,et al.Principle and method to simulate rainfall with the similar kinetic energy[J].Science of Soil and Water Conservation,2007,5(6):102-105.(in Chinese)
[12]汤永净,邵振东.基于环境变迁影响的古砖孔结构及饱和系数[J].同济大学学报(自然科学版),2015,43(11):1662-1669.Tang Yongjing,Shao Zhendong.Ancient brick pore structure and saturation coefficient based on environmental variation[J].Journal of Tongji University(Natural Science),2015,43(11):1662-1669.(in Chinese)
[13]徐晖,刘祥国,周承德.砌体抗压强度及其影响因素探讨[J].石油工程建设,2005,31(6):18-21.Xu Hui,Liu Xiangguo,Zhou Chengde.Discussion on compressive strength of masonry and its influence factors[J].Petroleum Engineering Construction,2005,31(6):18-21.(in Chinese)
[14]刘桂秋,施楚贤,刘一彪.砌体及砌体材料弹性模量取值的研究[J].湖南大学学报(自然科学版),2008,35(4):29-32.Liu Guiqiu,Shi Chuxian,Liu Yibiao.Analyses of the Elastic Modulus Values of Masonry[J].Journal of Hunan University(Natural Sciences),2008,35(4):29-32.(in Chinese)
[2]郑山锁,宋哲盟,赵鹏.冻融循环对再生混凝土砖砌体抗压性能的影响[J].建筑材料学报,2016,19(1):131-136.Zheng Shansuo,Song Zhemeng,Zhao Peng.The influence of freeze-thaw cycle on the compressive behaviors of recycled concrete brick masonry[J].Journal of Building Materials,2016,19(1):131-136.(in Chinese)
[3]商效瑀,郑山锁,徐强,等.冻融循环下轴心受压砖砌体损伤本构关系模型[J].建筑材料学报,2015,18(6):1045-1049.Shang Xiaoyu,Zheng Shansuo,Xu qiang,et al.Damage constitute model of brick masonry under freezethaw cycles and axial compression[J].Journal of Building Materials,2015,18(6):1045-1049.(in Chinese)
[4]戴仕炳,刘斐,周月娥,等.古建筑烧结粘土砖性能检测的超声波方法研究[J].文物保护与考古科学,2016,28(2):16-23.Dai Shibing,Liu Fei,Zhou Yuee,et al.Preliminary research on using ultrasonics to determine the physical properties of sintered clay bricks used in ancient Chinese architecture[J].Sciences of Conservation and Archaeology,2016,28(2):16-23.(in Chinese)
[5]肖煌俊,刘卫东,谈晓青,等.历史保护建筑砖材强度检测方法研究[J].工程力学,2010,27(2):276-279.Xiao Huangjun,Liu Weidong,Tan Xiaoqing,et al.Research on the strength detection method of bricks in historical conservation buildings[J].Engineering Mechanics,2010,27(2):276-279.(in Chinese)
[6]林维正,张晓燕.超声回弹综合法检测墙体材料的强度[J].建筑材料学报,1998,1(4):359-362.Lin Weizheng,Zhang Xiaoyan.Strength measurement of wall board material by the combination of ultrasonic and rebound method[J].Journal of Building Materials,1998,1(4):359-362.(in Chinese)
[7]Totoev Y Z,Nichols J M.A Comparative Experimental Study of the Modulus of Elasticity of Bricks and Masonry[C]International Brick and Block Masonry Conference,1997.
[8]Kojima T,Haya H,Minegishi K,et al.Ultrasonic velocity measurement for analysis of brick structure[C]Ultrasonics Symposium,2008.Ius.IEEE,2008:398-401.
[9]周霄,胡源,王金华,等.水硬石灰在花山岩画加固保护中的应用研究[J].文物保护与考古科学,2011,(02):1-7.Zhou Xiao,Hu Yuan,Wang Jinhua,et a1.Study on hydraulic lime mortar used for consolidation of Huashan rock paintings[J].Sci Conserv Archaeol,2011,23(2):l-7.(in Chinese)
[10]封秋娟,李义宇,李培仁,等.山西云微物理特征的地面观测[J].气候与环境研究,2012,17(6):727-739.Feng Qiujuan,Li Yiyu,Li Peiren,et al.Ground observation of microphysical properties in shanxi province[J].Climatic and Environmental Research,2012,17(6):727-739.(in Chinese)
[11]薛燕妮,徐向舟,王冉冉,等.人工模拟降雨的能量相似及其实现[J].中国水土保持科学,2007,5(6):102-105.Xue Yanni,Xu Xiangzhou,Wang Ranran,et al.Principle and method to simulate rainfall with the similar kinetic energy[J].Science of Soil and Water Conservation,2007,5(6):102-105.(in Chinese)
[12]汤永净,邵振东.基于环境变迁影响的古砖孔结构及饱和系数[J].同济大学学报(自然科学版),2015,43(11):1662-1669.Tang Yongjing,Shao Zhendong.Ancient brick pore structure and saturation coefficient based on environmental variation[J].Journal of Tongji University(Natural Science),2015,43(11):1662-1669.(in Chinese)
[13]徐晖,刘祥国,周承德.砌体抗压强度及其影响因素探讨[J].石油工程建设,2005,31(6):18-21.Xu Hui,Liu Xiangguo,Zhou Chengde.Discussion on compressive strength of masonry and its influence factors[J].Petroleum Engineering Construction,2005,31(6):18-21.(in Chinese)
[14]刘桂秋,施楚贤,刘一彪.砌体及砌体材料弹性模量取值的研究[J].湖南大学学报(自然科学版),2008,35(4):29-32.Liu Guiqiu,Shi Chuxian,Liu Yibiao.Analyses of the Elastic Modulus Values of Masonry[J].Journal of Hunan University(Natural Sciences),2008,35(4):29-32.(in Chinese)
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