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CFRP加固混凝土梁配布(筋)率优化与造价模拟分析

第40卷第6期2018年11月沈一阳一工一业一大一学一学一报

Journal of Shenyang University of Technology Vo l .40No .6Nov .2018

收稿日期:2018-04-25.

基金项目:辽宁省教育厅科学研究一般项目(L 2015187).

作者简介:刘一相(1981-),男,辽宁丹东人,讲师,硕士,主要从事结构加固与工程造价等方面的研究.

*本文已于2018-09-0709?49在中国知网优先数字出版.网络出版地址:http :?https://www.wendangku.net/doc/2012396422.html, /kcms /detail /21.1189.T.20180906.1111.002.html doi :10.7688/j.issn.1000-1646.2018.06.21

CFRP 加固混凝土梁配布(筋)率优化与造价模拟分析

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刘一相1,崔熙光2

(1.辽东学院城市建设学院,辽宁丹东118003;2.沈阳建筑大学土木工程学院,沈阳110168)摘一要:针对CFRP 加固混凝土梁配布(筋)率优化问题,提出了在考虑材料价格的基础上,采用基

于应变协调条件和加固混凝土梁正截面受弯承载力的计算方法,利用拉格朗日函数推导出了配布

(筋)率优化表达式,并分别运用Excel 软件和预算模拟软件进行分析.结果表明:优化配布(筋)率与弹性模量之比二价格之比二抗拉强度之比有关;纤维复合材料的加固量一般在2~5层;当钢筋级

别较高二混凝土强度等级较低(C 20)时,不宜用碳纤维布加固,这与‘混凝土结构加固设计规范“

(GB 50367-2013)规定较符合.

关一键一词:碳纤维布(CFRP );加固;混凝土梁;配布(筋)率;优化;拉格朗日函数;造价;预

算模拟软件

中图分类号:TM 343一一一文献标志码:A 一一一文章编号:1000-1646(2018)06-0713-08Simulation analysis on optimization and cost of ratio of sheet to reinforcement in concrete beams reinforced with CFRP

LIU Xiang 1,CUI Xi-guang 2

(1.School of City Construction ,Eastern Liaoning University ,Dandong 118003,China ;2.School of Civil Engineering ,Shenyang Jianzhu University ,Shenyang 110168,China )Abstract :Aiming at the optimization of the ratio of sheet to reinforcement in concrete beams reinforced with the carbon fiber reinforced polymer (CFRP )and on the basis of considering the material price ,a calculation method based on the strain coordination conditions and the cross-sectional flexural bearing capacity of reinforced concrete beams was proposed.The optimization formula of the ratio of sheet to reinforcement was derived with the Lagrange function ,and both Excel software and budget simulation software were used for the analysis.The results show that the optimization of the ratio of sheet to reinforcement is related to the ratios of elastic modulus ,price and tensile strength ,and the reinforcement amount of fiber composite material is usually from 2to 5layers.When the reinforcement level is higher and the concrete strength level is lower (C 20),CFRP is not suitable for reinforcement ,which accords with the rules in the code for design of strengthening concrete structure (GB 50367-2013).

Key words :carbon fiber reinforced polymer ;reinforcement ;concrete beam ;ratio of sheet to reinforcement ;

optimization ;Lagrange function ;cost ;budget simulation software

一一近年来,碳纤维布等增强复合材料被广泛应用于混凝土结构的加固工程中[1].国内外对

CFRP 加固混凝土梁的研究主要集中在其抗弯性

能等方面[2-5],对CFRP 加固混凝土梁的配布(筋)率问题的研究相对较少.在实际工程中,对可靠性不足或业主要求提高可靠度的承重结构二第6期一一一杨秀荣,等:带约束拉杆L 形组合柱的抗震性能数值分析万方数据

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