EXPERIMENTAL STUDY ON FLEXURAL BEHAVIORS OF STONE BEAMS STRENGTHENED BY CFRP
-
摘要: 对4个未加固石梁及4个碳纤维布(CFRP)加固石梁进行了受弯性能试验研究,主要分析了未加固石梁与加固石梁在破坏形态、承载能力及变形能力方面的差异。试验结果表明：未加固石梁为典型的脆性破坏,加固石梁则表现出了非完全脆性破坏特征;加固后石梁的极限承载力有所提高,变形能力有所改善。对加固石梁的受弯承载力进行了理论分析,提出了极限受弯承载力的简化计算公式;达到极限荷载后,由于CFRP的作用,石梁仍有一定的承载能力,即承载力裕量,可避免石梁发生突然塌落的严重后果。Abstract: The experimental study on flexural behaviors of eight full-scale stone beams (including four beams unstrengthened and four beams strengthened by CFRP) was carried out. The failure modes, flexural capacity and deformability were analyzed. The experimental results show that the unstrengthened stone beams exhibit a typical brittle failure mode while the strengthened stone beams demonstrate a partially brittle failure mode when they are damaged. Furthermore, the flexural capacity and deformation capacity of the strengthened stone beams are improved to some extent. The theoretical analysis of the flexural capacity of the strengthened stone beams was conducted, and a simplified calculation formula of the ultimate flexural capacity was proposed. After reaching the ultimate load, the strengthened stone beams still had certain flexural capacity, namely flexural capacity margin, because of the action of CFRP; this characteristic could avoid the serious consequences of sudden collapse of stone beams.
-
Keywords:
- CFRP /
- stone beams /
- strengthening /
- non-fully brittle failure /
- flexural capacity /
- flexural capacity margin
-
-
[1] 田鹏刚, 陈平, 赵冬, 等. 乌杨汉阙加固与修复工程[J]. 西安建筑科技大学学报(自然科学版), 2005, 37(4): 492―495.
Tian Penggang, Chen Ping, Zhao Dong, et al. Strengthening and conservation of the Wuyang watchtower of the Han dynasty [J]. Journal of Xi’an University of Architecture and Technology (Natural Science Edition), 2005, 37(4): 492―495. (in Chinese)[2] 毛筱霏, 赵冬, 陈平, 等. CFRP加固石质文物抗弯性能研究[J]. 工业建筑, 2008, 38(7): 113―115.
Mao Xiaofei, Zhao Dong, Chen Ping, et al. Bend-resisting behaviors of lithoid cultural relic reinforced with CFRP [J]. Industrial Construction, 2008, 38(7): 113―115. (in Chinese)[3] 曹书文, 赵冬, 陈平. CFRP加固石梁的试验研究[J]. 建筑结构, 2010, 40(5): 53―55.
Cao Shuwen, Zhao Dong, Chen Ping. Test research on stony beams strengthened by CFRP [J]. Building Structure, 2010, 40(5): 53―55. (in Chinese)[4] 郭子雄, 王兰, 柴振岭, 等. 钢筋网改性砂浆加固石楼板受弯性能试验研究[J]. 建筑结构学报, 2011, 32(3): 69―74.
Guo Zixiong, Wang Lan, Chai Zhenling, et al. Experimental study on flexural behavior of stone slabs strengthened with ferrocement mortar [J]. Journal of Building Structures, 2011, 32(3): 69―74. (in Chinese)[5] 刘阳, 郭子雄, 刘宝成, 等. 嵌埋CFRP筋组合石梁受弯性能试验研究[J]. 建筑结构学报, 2011, 32(3): 75―81.
Liu Yang, Guo Zixiong, Liu Baocheng, et al. Experimental study on flexural behavior of NSM CFRP-stone composite beams [J]. Journal of Building Structures, 2011, 32(3): 75―81. (in Chinese)[6] 武晓敏, 徐福泉, 谢剑. 石梁加固技术[J]. 施工技术, 2014, 43(10): 66―68, 84.
Wu Xiaomin, Xu Fuquan, Xie Jian. Strengthening technology of stone beams [J]. Construction Technology, 2014, 43(10): 66―68, 84. (in Chinese)[7] Exadaktylos G E, Vardoulakis I, Kourkoulis S K. Influence of nonlinearity and double elasticity on flexure of rock beams-II. Characterization of Dionysos marble [J]. International Journal of Solids and Structures, 2001, 38: 4119―4145. [8] Kourkoulis S K, Ganniari-Papageorgiou E, Mentzini M. Dionysos marble beams under bending: A contribution towards understanding the fracture of the Parthenon architraves [J]. Engineering Geology, 2010, 115: 246―256. [9] GB/T 50152-2012, 混凝土结构试验方法标准[S]. 北京: 中国建筑工业出版社, 2012.
GB/T 50152-2012, Standard for test method of concrete structures [S]. Beijing: China Building Industry Press, 2012. (in Chinese)[10] GB 50010-2010, 混凝土结构设计规范[S]. 北京: 中国建筑工业出版社, 2010.
GB 50010-2010, Code for design of concrete structures [S]. Beijing: China Building Industry Press, 2010. (in Chinese)[11] GB 50367-2013, 混凝土结构加固设计规范[S]. 北京: 中国建筑工业出版社, 2013.
GB 50367-2013, Design code for strengthening concrete structure [S]. Beijing: China Building Industry Press, 2013. (in Chinese)[12] JTG E41-2005, 公路工程岩石试验规程[S]. 北京: 人民交通出版社, 2005.
JTG E41-2005, Test methods of rock for highway engineering [S]. Beijing: China Communication Press, 2005. (in Chinese) -
期刊类型引用(8)
1. 张丰宇，何佰昭，吴应雄，金捷，陈伟恩. CFRP板加固既有石楼板抗弯性能试验研究. 工程力学. 2024(12): 138-149 . 
本站查看
2. 张丰宇，何佰昭，吴志刚，吴应雄，胡贤忠，陈亚亮. 粘钢加固既有石楼板抗弯性能试验研究. 应用基础与工程科学学报. 2023(05): 1262-1277 . 百度学术
3. 邱锦华，苗伟，郭子雄，叶勇. CFRP筋复合增强板加固石梁受力性能有限元分析. 华侨大学学报(自然科学版). 2022(04): 432-439 . 百度学术
4. 陈志新，苗伟，叶勇. 预制CFRP筋增强条加固素石板受弯性能有限元分析. 华侨大学学报(自然科学版). 2022(05): 570-578 . 百度学术
5. 叶勇，苗伟，郭子雄，张世江. 预制CFRP筋增强板加固素石板受弯性能试验研究. 中南大学学报(自然科学版). 2021(02): 589-598 . 百度学术
6. 张世江，郭子雄，叶勇. CFRP筋增强板加固石梁受弯性能试验研究. 建筑结构学报. 2020(06): 189-194+204 . 百度学术
7. 董坤，郝建文，李鹏，郭海燕，杨树桐. 环境温差下FRP-混凝土界面粘结行为分析. 工程力学. 2020(11): 117-126 . 本站查看
8. 李战，张贤双. CFRP加固石质文物受弯承载力研究. 山西建筑. 2016(34): 49-51 . 百度学术
其他类型引用(3)
计量
- 文章访问数: 363
- HTML全文浏览量: 38
- PDF下载量: 50
- 被引次数: 11
下载:
