[1]张望喜,解圆聪,张倚天,等.锈蚀圆钢管混凝土短柱轴压承载力计算方法与修正公式[J].长安大学学报(自然科学版),2022,42(5):52-61.[doi:10.19721/j.cnki.1671-8879.2022.05.006]
　ZHANG Wang-xi,XIE Yuan-cong,ZHANG Yi-tian,et al.Calculation method and modification of axial bearing capacity of corroded circular concrete filled steel tubular stub columns[J].Journal of Chang’an University (Natural Science Edition),2022,42(5):52-61.[doi:10.19721/j.cnki.1671-8879.2022.05.006]
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锈蚀圆钢管混凝土短柱轴压承载力计算方法与修正公式()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第42卷
期数:
2022年5期
页码:
52-61
栏目:
桥梁与隧道工程
出版日期:
2022-09-30

文章信息/Info

Title:
Calculation method and modification of axial bearing capacity of corroded circular concrete filled steel tubular stub columns
文章编号:
1671-8879(2022)05-0052-10
作者:
张望喜1; 2; 解圆聪2; 张倚天3; 易伟建1; 2
(1. 湖南大学 工程结构损伤诊断湖南省重点实验室,湖南 长沙 410012; 2. 湖南大学 土木工程学院, 湖南 长沙 410012; 3. 湖南建工集团有限公司,湖南 长沙 410000)
Author(s):
ZHANG Wang-xi1; 2;  XIE Yuan-cong2;  ZHANG Yi-tian3;  YI Wei-jian1; 2
(1. Hunan Provincial Key Lab on Diagnosis for Engineering Structures of Hunan University, Changsha 410012, Hunan, China; 2. School of Civil Engineering, Hunan University, Changsha 410012, Hunan, China; 3. Hunan Construction Engineering Group Co., Ltd, Changsha 410000, Hunan, China)
关键词:
桥梁工程;  结构工程;  圆钢管混凝土短柱;  修正公式;  锈蚀;  承载力;  规范
Keywords:
bridge engineering;  structural engineering;  circular concrete filled steel tubular stub column;  modified formula;  corrosion;  bearing capacity;  code
分类号:
U445.57
DOI:
10.19721/j.cnki.1671-8879.2022.05.006
文献标志码:
A
摘要:
针对钢管混凝土柱在服役期间遭受自然界的锈蚀作用,构件承载力下降的安全问题,通过对比现有计算方法和非线性拟合,提出了考虑锈蚀率的承载力修正计算式。以锈蚀圆钢管混凝土短柱为研究对象,首先,搜集、整理国内外已有的试验数据,建立了锈蚀圆钢管混凝土短柱的轴压试验数据库。其次,依次对美国ANSI/AISC 360-16、日本AIJ、欧洲EN 1994-1-1:2004、中国DL/T 5085—1999和中国CECS 28—2012五个规范计算式以及3个考虑锈蚀影响的计算模型(Gao等、陈梦成等和花幼星模型)进行了承载力计算比较。最后,基于搜集的试验数据,以花幼星计算模型为基础,通过非线性拟合提出了考虑锈蚀率影响的承载力修正计算式,并结合中国设计习惯,转换为以设计值形式表示的锈蚀圆钢管混凝土短柱轴压承载力计算式。研究结果表明:所选的现有各钢管混凝土轴压承载力计算方法的计算值普遍小于试验值,总体偏于安全。在各国规范中,美国ANSI/AISC 360-16最为保守,而欧洲EN 1994-1-1:2004的计算值与试验值最为接近,从设计角度看,规范设计方法偏于保守有助于提高结构构件的安全储备; 在各计算模型中,Gao等模型预测结果最为理想,其次为陈梦成等模型和花幼星模型; 各方法计算值与试验值比值的变异系数均比较接近,离散程度相当,且最大相对偏差均在30%; 经过验算,提出的修正计算式具有较好的计算精度、安全性和适用性。
Abstract:
Aiming at the safety problem that concrete filled steel tubular columns suffer from natural corrosion and the decline of bearing capacity during service, a modified bearing capacity calculation formula considering corrosion rate was proposed, by comparing the existing calculation methods and nonlinear fitting. The corroded circular concrete filled steel tubular stub columns were taken as the research object. Firstly, based on the existing experimental data in domestic and foreign literatures(Gao S et al, Hua You-xing et al, Chen Meng-cheng et al)model, the database of axial compression test of corroded circular concrete filled steel tubular stub columns was established. Secondly, several calculation formula of axial compression bearing capacity of codes and calculation models considering the influence of corrosion at home and abroad were compared. Finally, based on the collected experimental data and the calculation model of Hua You-xing, a modified formula of bearing capacity considering the influence of corrosion rate was proposed by nonlinear fitting, and combined with the design habits of China, it was transformed into the calculation formula of axial compression bearing capacity of corroded circular concrete filled steel tubular stub columns expressed in the form of design values. The results show that the calculated values of the codes and models are generally less than the experimental values, which are generally safe. Among all the codes, ANSI/AISC 360-16 is the most conservative, while the calculated values of EN 1994-1-1:2004 are the closest to the experimental values. From the design point of view, the code is conservative, which helps to improve the safety reserve of structural members. Among all the models, Gao et al model has the best prediction results, followed by Chen Meng-cheng et al model and Hua You-xing et al model. The variation coefficients of the ratio between calculated values and experimental values of each calculation method are close, so the discreteness is similar, and the maximum deviation is about 30%. After checking calc

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金项目(52078201)
作者简介:张望喜(1971-),男,湖北黄冈人,教授,工学博士,E-mail:wxizhang2000@hnu.edu.cn。 通讯作者:张倚天(1987-),男,湖北黄冈人,高级工程师,工学博士,E-mail:yitianzhang@hnu.edu.cn。
更新日期/Last Update: 2022-09-30