预应力CFRP板粘结H型钢梁加固系数及参数分析

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (4): 17-24.

预应力CFRP板粘结H型钢梁加固系数及参数分析

董事尔¹, 马猛亮^1*, 王毅恒²

1.西南石油大学土木工程与建筑学院, 成都 610500;
2.四川理工学院土木工程学院, 自贡 643000

收稿日期:2018-08-16 出版日期:2019-04-28 发布日期:2019-04-28
通讯作者: 马猛亮(1993-),男,硕士,主要从事钢结构加固方面的研究,958632170@qq.com。
作者简介:董事尔(1963-),男,硕士,教授,主要从事钢结构领域方面的研究。
基金资助:
四川省教育厅项目资助(16ZB0246);四川省高校重点实验室开放基金项目:桥梁无损检测与工程计算(2017QYY01)

THE ANALYSIS OF PARAMETRIC AND REINFORCEMENT COEFFICIENT ABOUT H-SECTION STEEL BEAMS REINFORCED BY PRESTRESSED CFRP PLATES

DONG Shi-er¹, MA Meng-liang^1*, WANG Yi-heng²

1.School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610500, China;
2.School of Civil Engineering, Sichuan University of Science and Engineering, Zigong 643000, China

Received:2018-08-16 Online:2019-04-28 Published:2019-04-28

摘要/Abstract

摘要： 为研究各设计参数对预应力CFRP板加固H型钢梁刚度的影响,采用有限元软件ABAQUS对多组构件进行四点加载作用下的计算,分析CFRP板的长度变化、厚度变化、宽度变化、弹性模量变化以及预应力水平变化对加固性能的影响。在此基础上引入加固系数,结合简支梁跨中挠度计算公式给出适用于预应力CFRP板加固钢梁的计算公式,并将加固系数简化公式计算结果与有限元计算结果进行对比。研究结果表明:CFRP板的长度、宽度、厚度以及预应力大小对加固钢梁的刚度影响显著,CFRP板弹性模量对钢梁刚度的影响较小,且给出的加固系数简化公式具有一定的适用性和准确性。

关键词: 预应力CFRP板, 加固后刚度, 加固系数, 有限元

Abstract: Sticking carbon fiber reinforced composite material is a new reinforcement method. Compared with the traditional reinforcement material, it has the characteristics of light weight and high strength. However, the strength utilization ratio of strengthened by common CFRP is low. Therefore, some scholars put forward the method reinforced by prestressed CFRP plates. In view of the present study, no concrete formula for stiffness of composite beams after reinforcement is given. Therefore, to study the effect of design parameters on H-section steel beam stiffness reinforced by prestressed CFRP plates, the finite element software ABAQUS was used to calculate the multi components under four-points-loading. The influence of CFRP plate length, thickness, width, modulus of elasticity and prestress level on the strengthening performance were analyzed. 0n this basis, the reinforcement coefficient was introduced. Combining with the calculation formula of the mid-span deformation on simple supported beam, the calculation formula for steel beam reinforced by prestressed CFRP plate was given. Afterwards, the calculation results of simplified calculation formula of reinforcement coefficient were compared with the results calculated by ABAQUS. The results show that length, width, thickness and prestress size of the CFRP plate have a significant influence on stiffness of reinforced steel beam. Meanwhile, the elastic modulus of CFRP plate has little effect on the stiffness of steel beam, and the simplified formula of strengthening coefficient has certain applicability and accuracy.

Key words: prestressed CFRP plate, stiffness after reinforcement, reinforcement coefficient, finite element

中图分类号:

TB332

董事尔, 马猛亮, 王毅恒. 预应力CFRP板粘结H型钢梁加固系数及参数分析[J]. 玻璃钢/复合材料, 2019, 0(4): 17-24.

DONG Shi-er, MA Meng-liang, WANG Yi-heng. THE ANALYSIS OF PARAMETRIC AND REINFORCEMENT COEFFICIENT ABOUT H-SECTION STEEL BEAMS REINFORCED BY PRESTRESSED CFRP PLATES[J]. Fiber Reinforced Plastics/Composites, 2019, 0(4): 17-24.

参考文献

[1] 赵宏康, 张为民, 戴雅萍, 等. 钢结构在某制药厂不停产加固改造工程中的应用. 工业建筑, 2002, 32(2): 63-65.
[2] 魏洋, 吴刚, 吴智深, 等. CFRP加固混凝土短方柱抗震性能试验研究. 工程抗震与加固改造, 2007(1): 33-38.
[3] 顾冬生, 吴刚, 吴智深, 等. CFRP加固高轴压比钢筋混凝土短圆柱抗震性能试验研究. 工程抗震与加固改造, 2006(6): 71-77.
[4] 陈艳华, 张鹏飞, 杨梅, 等. CFRP加固锈蚀钢筋混凝土柱抗震性能研究. 土木工程学报, 2013(s2): 196-200.
[5] 侯东序, 董伟, 吴智敏, 等. CFRP加固局部薄弱混凝土桥墩非线性分析. 武汉理工大学学报(交通科学与工程版), 2014(3): 520-524.
[6] Peng S, Xu C, Lu M, et al. Experimental research and finite element analysis on seismic behavior of CFRP-strengthened seismic-damaged composite steel-concrete frame columns. Engineering Structures, 2018, 155: 50-60.
[7] Zhang S S, Yu T, Chen G M. Reinforced concrete beams strength-ened in flexure with near-surface mounted (NSM) CFRP strips: Current status and research needs. Composites Part B-Engineering, 2017, 131: 30-42.
[8] 碳纤维片材加固混凝土结构技术规程: CECS146-2003. 北京: 中国计划出版社, 2003.
[9] CMT. The rehabilitation of steel bridge girders using advanced composite materials. US: University of Delaware, 2000.
[10] 陶利. 预应力CFRP板加固钢梁抗弯性能的试验研究. 柳州: 广西工学院, 2010.
[11] 霍君华. 预应力CFRP布加固腐蚀钢梁及组合梁的力学性能. 沈阳: 东北大学, 2011.
[12] 杜维凤. 二次受力下预应力CFRP板加固钢梁有限元模拟分析. 合肥: 合肥工业大学, 2016.
[13] 钢结构加固技术规范: CECS77∶96. 1996.
[14] 徐佰顺, 钱永久, 唐继舜, 等. 基于黏弹性本构的CFRP-钢界面应力参数敏感性分析. 公路交通科技, 2017, 34(11): 57-63.
[15] 公路桥梁加固设计规范: JTG/T J22—2008. 2008.
[16] Deuring M. Verstrken von Stahlbeton mit gespannten Faserverbundwerkstoffen . Zürich, 1993.