高强方钢管轻骨料混凝土桁架加劲搭接K形节点承载力研究
PDF下载 (298)王政通,宓竹锟,潘 鹏,王万祯,吴晓聪.高强方钢管轻骨料混凝土桁架加劲搭接K形节点承载力研究[J].宁波大学学报(理工版),2022,35(5):64-71.DOI:
WANG Zhengtong,MI Zhukun,PAN Peng,WANG Wanzhen,WU Xiaocong.Bearing capacity of lightweight aggregate concrete-filled high strength square steel tube truss with stiffened lapped K-joint[J].Journal of Ningbo University(Natural Science & Engineering Edition),2022,35(5):64-71.DOI:
| Title: | Bearing capacity of lightweight aggregate concrete-filled high strength square steel tube truss with stiffened lapped K-joint |
| 作者: | 王政通, 宓竹锟, 潘 鹏, 王万祯, 吴晓聪 |
| Author(s): | WANG Zhengtong, MI Zhukun, PAN Peng, WANG Wanzhen, WU Xiaocong |
| 关键词: | 高强方钢管; 轻骨料混凝土; 加劲搭接K形节点; 加载试验; 数值模拟; 承载力计算 |
| Keywords: | stiffened lapped K-joint; high strength square steel tube; lightweight aggregate concrete; test; numerical simulation; formula for calculating the ultimate bearing capacity |
| 分类号: | TU398; TU317 |
| 文献标识码: | A |
| 摘要: | 对高强方钢管轻骨料混凝土桁架加劲搭接K形节点和基本型节点进行主管轴压静力加载试验, 考察了支管搭接率和加劲板构造对节点受力性能的影响. 试验结果表明: 节点的破坏模式为支管根部侧面搭接焊缝开裂; 支管搭接率过大或过小均会降低搭接K形节点承载力; 加劲节点的屈服荷载和极限荷载较基本型节点分别提高6.5％和12.0％. 同时, 对高强方钢管轻骨料混凝土桁架加劲搭接K形节点进行了数值模拟、热点应力场演化分析和破坏机理探究, 推导了极限承载力计算式. 通过与节点试验结果对比, 验证了该计算式的精度. |
| Abstract: | In order to study the effect of braces lap ratio and stiffening plates on the performance of lightweight aggregate concrete-filled high strength square steel tube truss with lapped K-joint, static loading tests under axial compression were performed on stiffened lapped K-joints and traditional lapped K-joint. Tests results show that crack of lapped weld between braces is the typical failure mode of the lapped K-joint. Too large or too small overlap ratio can reduce the bearing capacity of the lapped K-joint. The yield load and ultimate bearing capacity of the stiffened lapped K-joint increase by 6.5％ and 12.0％ respectively compared with those of the traditional lapped K-joint. The numerical simulation, hot spot stress evolution and failure mechanism analysis of the lapped K-joints were also carried out. The formula for calculating the ultimate bearing capacity of the lapped K-joint was proposed. Compared with the test results, the accuracy of the proposed formula for calculating the ultimate bearing capacity of the lapped K-joint was verified. |
| 参考文献 /References: | [1] Huang W J, Fenu L, Chen B C, et al. Experimental study on K-joints of concrete-filled steel tubular truss structures [J]. Journal of Constructional Steel Research, 2015, 107:182-193. [2] 王忠颖, 邓芃, 刘艳, 等. 方钢管混凝土K型节点滞回性能试验研究[J]. 钢结构, 2017, 32(10):29-33. [3] Xie K Z, Wang H W, Pang J H, et al. Study of the ultimate bearing capacity of concrete-filled steel tube K-joints[J]. KSCE Journal of Civil Engineering, 2019, 23(5):2254-2262. [4] 王万祯, 李华, 吴晓聪, 等. 高强方钢管轻骨料混凝土桁架加劲T型节点试验[J]. 哈尔滨工业大学学报, 2020, 52(8):103-111. [5] 王万祯, 李华, 吴晓聪. 方钢管轻骨料混凝土加劲TY型节点承载力研究[J]. 华中科技大学学报(自然科学版), 2020, 48(8):33-38. [6] 王万祯, 郭鸣鸣, 吴晓聪. 主方支圆钢管轻骨料混凝土K型节点承载力[J]. 华中科技大学学报(自然科学版), 2020, 48(5):61-67. [7] Jiang L, Liu Y J, Fam A, et al. Stress concentration factor parametric formulae for concrete-filled rectangular hollow section K-joints with perfobond ribs[J]. Journal of Constructional Steel Research, 2019, 160:579-597. [8] 杨文伟, 高栋, 索雅琪. 中空夹层钢管混凝土-钢管K形搭接节点抗震性能试验研究[J]. 建筑结构学报, 2020, 41(2):42-54. [9] 杨文伟, 林健康, 高栋. 中空夹层钢管混凝土K型搭接节点滞回性能[J]. 哈尔滨工程大学学报, 2019, 40(11):1876-1883. [10] 林健康, 杨文伟, 高栋, 等. 主管夹层灌混凝土的K型搭接节点滞回耗能分析[J]. 建筑科学, 2019, 35(3):59- 69. [11] 同济大学, 浙江杭萧钢构股份有限公司. 矩形钢管混凝土结构技术规程[M]. 北京: 中国计划出版社, 2004. [12] 王万祯. 结构钢开裂准则及断裂试验分析[J]. 工程力学, 2008, 25(5):27-31. |
| 备注/Memo: | 收稿日期: 2022－03－29. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省基础公益技术研究计划（LGF18E080007）. 第一作者: 王政通(1999－）, 男, 浙江义乌人, 在读硕士研究生, 主要研究方向: 钢结构和组合结构. E-mail: wangzhengtong0101@163.com *通信作者: 王万祯(1975－）, 男, 河南周口人, 教授, 主要研究方向: 钢结构和组合结构. E-mail: wangwanzhen1975@sina.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
