[1]吕文龙,许勇,沈朝勇,等.钢丝网复合砂浆加固受火后钢筋混凝土框架梁的抗震性能试验研究[J].地震工程与工程振动,2017,01(6):169-176.[doi:10.13197/j.eeev.2017.06.169.lvwl.019]
 LV Wenlong,XU Yong,SHEN Chaoyong,et al.Seismic behavior of RC frame beams after fire strengthened with ferrocement[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2017,01(6):169-176.[doi:10.13197/j.eeev.2017.06.169.lvwl.019]
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钢丝网复合砂浆加固受火后钢筋混凝土框架梁的抗震性能试验研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
01
期数:
2017年6
页码:
169-176
栏目:
论文
出版日期:
2017-12-31

文章信息/Info

Title:
Seismic behavior of RC frame beams after fire strengthened with ferrocement
作者:
吕文龙1 许勇2 沈朝勇3 罗志靖2
1. 广东省建筑科学研究院集团股份有限公司, 广东 广州 510500;
2. 广州大学 土木工程学院, 广东 广州 510006;
3. 广州大学 工程抗震中心, 广东 广州 510405
Author(s):
LV Wenlong1 XU Yong2 SHEN Chaoyong3 LUO Zhijing2
1. Guangdong Provincial Academy of Building Research Group Company Limited, Guangzhou 510500, China;(;
2. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;
3. Earthquake Engineering Research Test Center, Guangzhou University, Guangzhou 510405, China
关键词:
钢筋混凝土框架梁钢丝网复合砂浆加固反复荷载火灾
Keywords:
reinforced concreteframe beamferrocementrehabilitationcyclic loadingfire
分类号:
P315.95
DOI:
10.13197/j.eeev.2017.06.169.lvwl.019
摘要:
通过2个钢丝网复合砂浆加固受火后钢筋混凝土框架梁和1个未受火框架梁的对比试验,分析了低周反复荷载作用下钢丝网复合砂浆加固受火后钢筋混凝土框架梁的加固效果,测试了各框架梁的抗震承载力、延性、破坏形态及其滞回特性。试验结果表明:(1)在反复荷载作用下,钢丝网复合砂浆加固受火后框架梁梁端顶部出现裂缝时间比未受火的框架梁早,梁端底部出现裂缝时间比未受火框架梁迟;(2)钢丝网复合砂浆加固受火1.5 h后试件的抗弯极限承载力与未受火试件基本相等,而钢丝网复合砂浆加固受火2 h后试件的极限承载力比未受火试件有所降低;(3)随着受火时间的增加,钢丝网水泥砂浆加固受火后框架梁的抗弯极限承载力下降;(4)钢丝网复合砂浆加固受火后框架梁的延性系数与受火时间关系不大,加固后的受火框架梁具有较好的抗震性能。
Abstract:
Two RC frame beams after fire strengthened with ferrocement and one RC frame beam without damaging by fire have been tested under cyclic loading. The strengthening effect of ferrocement is checked and analyzed. Seismic bearing capacity, ductility, failure modes and hysteresis characteristic of all beams are tested. The results show that:(1) Under cyclic loading, cracks at the top of beam end of the RC frame beams after fire strengthened with ferrocement appear earlier than those without damaging by fire, but cracks at the bottom of beam end of the RC frame beams after fire strengthened with ferrocement appear later than those without damaging by fire;(2) The flexural ultimate bearing capacity of specimen after 1.5 h fire strengthened with ferrocement is almost the same as that of specimen without damaging by fire, while the flexural ultimate bearing capacity of specimen after 2 h fire strengthened with ferrocement is less than that of the specimen without damaging by fire;(3) With the increase of fire time, the ultimate flexural capacity of the RC frame beams after fire strengthened with ferrocement is decreased;(4) There is little relationship between the ductility coefficient of the RC frame beams after fire strengthened with ferrocement and fire time, and the frame beams after fire strengthened with ferrocement have good seismic behavior.

参考文献/References:

[1] ACI Committee. A guide for the design, construction and repair of ferrocement[J]. ACI Structural Journal, 1988, 85(3):323-351.
[2] ACI Committee 549. Guide for the Design, Construction and Repair of Ferrocement[S]. American Concrete Institute, Re-approved, 1999.
[3] Paramasivam P, Ong K C G, Lim C T E. Ferrocement laminates for strengthening RC T-beams[J]. Cement and Concrete Composites, 1994, 16(2):143-152.
[4] Paramasivam P, Lim C T E, Gong K C. Strengthening of RC beams with ferroceent laminates[J]. Cement and Concrete Composites, 1998, 20(1):53-65.
[5] Singh G, Xiong G J. Ultimate moment capacity of ferrocement reinforced with weldmesh[J]. Cement and Concrete Composites, 1992, 14(4):257-267.
[6] Xiong G J, Singh G. Rational evaluation of flexural behavior of weldmesh ferrocement in normal and corrosive environments[J]. ACI Structural Journal, 1998, 95(6):647-653.
[7] Mothana A A, Mohd Z J. Ferrocement laminate strengthens RC beams[J]. Concrete International, 2000, 22(6):37-43.
[8] 尚守平, 曾令宏, 彭晖, 等. 复合砂浆钢丝网加固RC受弯构件的试验研究[J]. 建筑结构学报, 2003,24(6):87-91. SHANG Shouping, ZENG Linghong, PENG Hui, et al. Flexural behavior of reinforced concrete beams with ferrocement[J]. Journal of Building Structures, 2003, 24(6):87-91. (in Chinese)
[9] 尚守平, 曾令宏, 戴睿. 钢丝网复合砂浆加固RC梁二次受力受弯试验研究[J]. 建筑结构学报, 2005, 26(5):74-80. SHANG Shouping, ZENG Linghong, DAI Rui. Experimental study on flexural behavior of reinforced concrete beams strengthened with ferrocement under secondary load[J]. Journal of Building Structures, 2005, 26(5):74-80. (in Chinese)
[10] 尚守平, 曾令宏, 彭晖. 钢丝网复合砂浆加固混凝土受弯构件非线性分析[J]. 工程力学, 2005, 22(3):118-125. SHANG Shouping, ZENG Linghong, PENG Hui. Nonlinear analysis of reinforced concrete beam strengthened with ferrocement[J]. Engineering mechanics, 2005, 22(3):118-125.(in Chinese)
[11] GB50010-2010混凝土结构设计规范[S]. 北京:中国建筑工业出版社, 2010. GB 50011-2010 Code for Design of Concrete Structures[S]. Beijing:China Architecture & Building Press, 2010.(in Chinese)
[12] GB 50011-2010建筑抗震设计规范[S]. 北京:中国建筑工业出版社, 2010. GB 50011-2010 Code for Seismic Design of Buildings[S]. Beijing:China Architecture & Building Press, 2010.(in Chinese)
[13] DBJ/T 15-81-2011建筑混凝土结构耐火设计技术规程[S]. 北京:中国建筑工业出版社, 2011. DBJ/T 15-81-2011 Code for Fire Resistance Design of Concrete Structures in Buildings[S]. Beijing:China Architecture & Building Press, 2010.(in Chinese)
[14] Park R. Evaluation of ductility of structures and structural assemblages from laboratory testing[J]. Bulletin of the New Zealand National Society for Earthquake Engineering, 1989, 22(3):155-166.
[15] 郑山锁, 王斌, 于飞, 等. 低周反复荷载作用下型钢高强高性能混凝土框架梁损伤试验研究[J]. 工程力学, 2011, 28(7):37-44. ZHENG Shansuo, WANG Bin, YU Fei, et al. Experimental study on damage of srhshpc frame beams under low cycle reveresed loading[J]. Engineering Mechanics, 2011, 28(7):37-44.(in Chinese)
[16] 王逢朝, 李振宝, 崔宏剑. 梁端开孔钢筋混凝土框架梁受力性能的试验研究[J]. 工程力学, 2011, 28(11):52-58. WANG Fengchao, LI Zhenbao, CUI Hongjian. Experimental studying about bearing capacity of beam of RC-frame with opening in the end[J]. Engineering Mechanics, 2011, 28(11):52-58. (in Chinese)

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备注/Memo

备注/Memo:
收稿日期:2017-02-15;改回日期:2017-05-21。
基金项目:住房与城乡建设部科技计划资助项目(2011-k3-21)
作者简介:吕文龙(1981-),男,教授级高级工程师,博士,主要从事结构加固改造方面的研究.E-mail:midworm@163.com
更新日期/Last Update: 1900-01-01