|本期目录/Table of Contents|

[1]王淑红,刘向宏,孙清,等.圆锥形中空夹层钢管混凝土构件压弯性能及承载力计算方法研究[J].建筑科学与工程学报,2025,42(02):67-81.[doi:10.19815/j.jace.2023.04004]
　WANG Shuhong,LIU Xianghong,SUN Qing,et al.Study on bending behavior and bearing capacity calculation method of tapered concrete-filled double skin steel tubular members[J].Journal of Architecture and Civil Engineering,2025,42(02):67-81.[doi:10.19815/j.jace.2023.04004]
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圆锥形中空夹层钢管混凝土构件压弯性能及承载力计算方法研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
42卷
期数:
2025年02期
页码:
67-81
栏目:
建筑结构
出版日期:
2025-03-20

文章信息/Info

Title:
Study on bending behavior and bearing capacity calculation method of tapered concrete-filled double skin steel tubular members
文章编号:
1673-2049(2025)02-0067-15
作者:
王淑红1,刘向宏2,孙清2,王建涛3,张琳琳1,陈赛慧1
(1. 国网浙江省电力有限公司经济技术研究院,浙江 杭州 310008; 2. 西安交通大学 人居环境与建筑工程学院,陕西 西安 710049; 3. 西安建筑科技大学 土木工程学院,陕西 西安 710055)
Author(s):
WANG Shuhong1, LIU Xianghong2, SUN Qing2, WANG Jiantao3, ZHANG Linlin1, CHEN Saihui1
(1. Economic and Technical Research Institute, State Grid Zhejiang Electric Power Co., Ltd, Hangzhou 310008, Zhejiang, China; 2. School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China; 3. College of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, Shaanxi, China)
关键词:
圆锥形中空夹层钢管混凝土构件;  数值模拟;  弯矩分配机制;  截面应力积分理论
Keywords:
tapered concrete-filled double skin steel tubular member;  numerical modelling;  moment distribution mechanism;  theory of section stress integral
分类号:
TU391
DOI:
10.19815/j.jace.2023.04004
文献标志码:
A
摘要:
面向海上风电支撑结构大型化发展需求,研究了大空心率、大筒身锥度和超限径厚比下圆锥形中空夹层钢管混凝土(CFDST)构件的压弯受力全过程机理,将构件弯矩-位移曲线划分为弹性、开裂、弹塑性和破坏4个受力阶段; 阐明了关键因素对圆锥形CFDST构件承载力和刚度的影响规律。基于截面应力积分理论提出了圆锥形CFDST构件压弯相关性曲线计算方法,分析了不同约束混凝土本构模型计算轴力-弯矩曲线的差异性,对比了规范建议压弯承载力公式和极限状态法计算结果,验证了截面应力积分理论计算方法的准确性。结果表明:筒身锥度、内外钢管径厚比与承载力和刚度呈负相关; 截面空心率、轴压比小于界限值时与承载力和刚度呈正相关,反之呈负相关; 内外钢管屈服强度和混凝土强度与承载力和刚度呈正相关; 采用截面应力积分理论、规范压弯承载力计算公式和极限状态法均可良好描述轴力-弯矩曲线的变化规律,且具有计算效率高、准确性好的优势; 研究成果可对大空心率、大锥度及超限径厚比的圆锥形中空夹层钢管混凝土构件在风电工程中的应用提供有益参考。
Abstract:
Against the large-scale development requirement on support structure of offshore wind turbine, the full-range compression-bending mechanism of tapered concrete-filled double skin steel tubular(CFDST)members was examined under the large hollow ratios and taper degree as well as the out-of-code diameter-to-thickness ratios, where the moment-displacement curves could be divided into four stages, namely the elastic stage, cracking stage, elastic-plastic stage and failure stage. Influence of key parameters on ultimate bearing capacity and stiffness of tapered CFDST was revealed. Based on the section stress integral theory, the calculation method of the compression-bending correlation curve of tapered CFDST members was proposed. The difference of axial force-moment correlation curves calculated by different confined concrete constitutive models was analyzed. The calculation results of the proposed compression-bending bearing capacity formula and the limit state method were compared. The accuracy of the section stress integral theory calculation method was verified. The results show that the taper degree and diameter-to-thickness ratios of double-skin tubes are negatively correlated with the bearing capacity and stiffness. The cross-sectional hollow ratios and axial compression ratios within the limited value are positively correlated with the bearing capacity and stiffness, and inversely, they are negatively correlated. The yield strengths of double-skin tubes and compressive strength of sandwich concrete are positively correlated. The variation of axial force-moment correlation curves can be well described by using the theory of section stress integral, the calculation formula of bending bearing capacity and the limit state method, and it has the advantages of high calculation efficiency and good accuracy. The research results can provide useful reference for the application of tapered CFDST members with large hollow ratios, large taper degree and out-of-code radius-thickness ratio in wind power projects.

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备注/Memo

备注/Memo:
收稿日期:2023-04-01
基金项目:国家自然科学基金项目(51978570); 国网浙江省电力有限公司科技项目(5211JY220003)
作者简介:王淑红(1972-),女,高级工程师,E-mail:909780460@qq.com。
通信作者:孙 清(1970-),男,工学博士,教授,博士生导师,E-mail:sunq@mail.xjtu.edu.cn。
Author resumes: WANG Shuhong(1972-), female, senior engineer, E-mail:909780460@qq.com; SUN Qing(1970-), male, PhD, professor, E-mail: sunq@mail.xjtu.edu.cn.
更新日期/Last Update: 2025-03-20