[1]赵文浩,李秀领.绿色高性能水泥基复合材料加固火损RC柱抗震性能研究[J].防灾减灾工程学报,2019,39(01):54-60.[doi:10.13409/j.cnki.jdpme.2019.01.008]
 ZHAO Wenhao,LI Xiuling.Numerical Study on Seismic Behavior of Fire Damaged RC Columns Reinforced by Green High-performance Fiber-reinforced Cementitious Composites[J].Journal of Disaster Prevention and Mitigation Engineering,2019,39(01):54-60.[doi:10.13409/j.cnki.jdpme.2019.01.008]
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绿色高性能水泥基复合材料加固火损RC柱抗震性能研究()
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防灾减灾工程学报[ISSN:1672-2132/CN:32-1695/P]

卷:
39卷
期数:
2019年01期
页码:
54-60
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Numerical Study on Seismic Behavior of Fire Damaged RC Columns Reinforced by Green High-performance Fiber-reinforced Cementitious Composites
文章编号:
1672-2132(2019)01-0054-07
作者:
赵文浩12 李秀领12
1.山东建筑大学土木工程学院,山东 济南 250101; 2.山东省绿色建筑协同创新中心, 山东 济南 250101
Author(s):
ZHAO Wenhao12 LI Xiuling12
1.School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2.Shandong Co-Innovation Center of Green Building, Jinan 250101, China
关键词:
绿色高性能纤维增强水泥基复合材料 火损 加固 抗震性能 数值模拟
Keywords:
Green High-Performance Fiber-reinforced Cementitious Composites(GHPFRCC) fire damage reinforcement seismic performance numerical simulation
分类号:
TU375.3
DOI:
10.13409/j.cnki.jdpme.2019.01.008
文献标志码:
A
摘要:
绿色高性能纤维增强水泥基复合材料是一种用大掺量粉煤灰替代水泥的改性工程水泥基复合材料,具有优异的延性与抗震耗能能力。为解决火灾后RC柱抗震等问题,提出采用GHPFRCC材料加固方法。对采用GHPFRCC材料加固RC柱进行拟静力试验,并采用OpenSees有限元软件进行数值模拟,通过对比模拟结果与试验结果,验证有限元分析的可靠性。结果表明:滞回曲线、骨架曲线的试验值和模拟值整体吻合,极限承载力的偏差不大; 与未加固RC柱相比,经过加固后的RC柱变形能力明显增加,加固后极限承载力提高26.63%,极限位移提高12.5%,后期水平荷载退化速率降低,滞回曲线更加饱满,抗震性能更加优秀。同时使用OpenSees进行参数分析可知,为了保证RC加固柱的延性与承载力,必须控制轴压比,建议GHPFRCC置换高度大于1/3柱高。
Abstract:
Green High-Performance Fiber-Reinforced Cementitious Composites(GHPFRCC)is a material of Engineered Cementitious Composite(ECC), where cement is substituted by a large amount of fly ash, with excellent ductility and energy dissipation capacity.In order to increase the seismic performance of RC columns after fire, a reinforcement method was proposed by using GHPFRCC materials.Pseudo static tests of RC columns reinforced by GHPFRCC materials was carried out, and numerical simulation was performed by using OpenSees.The reliability of the finite element analysis was verified by comparing the simulation results with the test results.Based on the test results and finite element analysis, it was proved that the hysteresis loop and the skeleton curve obtained from the tests were in good agreement with those from the simulation, and the deviation of the ultimate bearing capacity was not large.Compared with unreinforced RC columns, the deformation capacity of RC columns increased obviously.Specifically, the ultimate bearing capacity and the limit displacement increased respectively by 26.63% and 12.5% after reinforcement.Meanwhile, the degradation rate of post horizontal load decreased, the hysteresis loop became fuller, and the seismic performance was better.Furthermore, a parametric analysis was carried out using OpenSees.The analysis showed that the axial compression ratio must be well controlled in order to ensure the ductility and bearing capacity of RC columns; it is suggested that the replacement height of GHPFRCC materials is greater than one third of the column height.

参考文献/References:

[1] 罗 敏.绿色高性能纤维增强水泥基复合材料加固钢筋混凝土柱试验研究[D].济南:山东建筑大学,2013.
Luo M.The experimental study on the columns reinforced by green high-performance fiber-reinforced cementitious composites[D].Jinan: Shandong Jianzhu University, 2013.(in Chinese)
[2] 王 娟.二次受力下绿色高性能纤维增强水泥基复合材料加固震损钢筋混凝土柱的抗震性能试验研究[D].济南:山东建筑大学,2015.
Wang J.Experimental study on seismic behavior of earthquake damaged rc columns retrofitted by GHPFRCC under secondary loading[D].Jinan: Shandong Jianzhu University, 2015.(in Chinese)
[3] 薛 娜.高温后绿色高性能纤维增强水泥基复合材料与钢筋粘结性能试验研究[D].济南:山东建筑大学,2016.
Xue N.Experimental study on bond behavior between green high performance fiber reinforced cementitious composites and steel bars after high temperature[D].Jinan: Shandong Jianzhu University, 2016.(in Chinese)
[4] Li X L, Bao Y, Xue N, et al.Bond strength of steel bars embedded in a high-performance fiber-reinforced cementitious composite before and after exposure to elevated temperatures[J].Fire Safety Journal, 2017, 92: 98-106.
[5] Kojima S, Sakata N, Kanda T,et al.Application of direct sprayed ECC for retrofitting dam structure surface-application for Mitaka-Dam[J].Concrete Journal, 2004, 42(5): 135-139.
[6] Gencturk B.Behavior of concrete and ECC structures under simulated earthquake motion[J].Journal of Structural Engineering, 2013, 139(3): 389-399.
[7] Fischer G, Li V C.Effect of matrix ductility on deformation behavior of steel reinforced ECC flexural members under reversed cyclic loading conditions[J].ACI Structural Journal, 2002, 99(6): 781-791.
[8] Li X L, Bao Y, Wu L L, et al.Thermal and mechanical properties of high-performance fiber-reinforced cementitious composites after exposure to high temperatures [J].Construction and Building Materials, 2017, 157: 829-838.
[9] Li X L, Wang J, Bao Y, et al.Cyclic behavior of damaged reinforced concrete columns repaired with high-performance fiber-reinforced cementitious composite[J].Engineering Structure, 2017, 136: 26-35.
[10] Xu L, Pan J L, Chen J H.Mechanical behavior of ECC and ECC/RC composite columns under reversed cyclic loading[J].Journal of Materials in Civil Engineering, 2017, 29(9):04017097.
[11] 赵 祥, 尚天伟, 谢启芳,等.基于ECC的小雁塔抗震加固性能分析[J].地震工程学报, 2017, 39(5): 829-835.
Zhao X, Shang T W, Xie Q F, et al.Performance analysis of Small Wild Goose Pagoda seismic reinforcement based on engineered cementitious composite[J].China Earthquake Engineering Journal, 2017, 39(5): 829-835.(in Chinese)
[12] Kodur V, Dwaikat M, Fike R.High-temperature properties of steel for fire resistance modeling of structures[J].Journal of Materials in Civil Engineering,2010, 22(5): 423-434.
[13] 肖建庄, 王 平, 朱伯龙.我国钢筋混凝土材料抗火性能研究回顾与分析[J].建筑材料学报, 2003, 6(2):182-189.
Xiao J Zh, Wang P, Zhu B L.Review on fire-resistance behavior of reinforced concrete in China[J].Journal of Building Materials, 2003, 6(2):182-189.(in Chinese)
[14] 陈学伟, 林 哲.结构弹塑性分析程序OpenSEES原理与实例[M].北京: 中国建筑工业出版社, 2014:3-11.
Chen X W, Lin Zh.Structural nonlinear analysis program OpenSEES theory and tutorial[M].Beijing: China Architecture & Building Press, 2014: 3-11.(in Chinese)
[15] Han T S, Feenstra P H, Billington S L.Simulation of highly ductile fiber-reinforced cement-based composite components under cyclic loading[J].ACI Structural Journal, 2003, 100(6):749-757.

备注/Memo

备注/Memo:
收稿日期:2017-12-03; 修回日期:2018-02-28 基金项目:国家自然科学基金项目(51108253; 51278290)、长江学者和创新团队发展计划教育部创新团队项目(IRT13075)资助 作者简介:赵文浩(1992-),男,硕士研究生。主要从事工程抗震和加固改造研究。Email:zhwh1992@foxmail.com 通讯作者:李秀领(1977-),男,教授,博士。主要从事工程抗震和加固改造研究。Email:lixiuling2006@163.com
更新日期/Last Update: 2019-02-20