往复加载下隔板贯通式箱型中柱-削弱型H型钢梁节点破坏机理研究
PDF下载 (369)童科挺,王万祯 *,郭 戈,王伟焘,孙韶江.往复加载下隔板贯通式箱型中柱-削弱型H型钢梁节点破坏机理研究[J].宁波大学学报(理工版),2015,28(04):53-58.DOI:
TONG Ke-ting,WANG Wan-zhen *,GUO Ge,WANG Wei-tao,SUN Shao-jiang.Fracture Mechanism of Diaphragm-through Type Joints of Steel Box Column and Reduced H-style Steel Beam under Low Cyclic Reversed Loading[J].Journal of Ningbo University(Natural Science & Engineering Edition),2015,28(04):53-58.DOI:
| Title: | Fracture Mechanism of Diaphragm-through Type Joints of Steel Box Column and Reduced H-style Steel Beam under Low Cyclic Reversed Loading |
| 作者: | 童科挺, 王万祯 *, 郭 戈, 王伟焘, 孙韶江 |
| Author(s): | TONG Ke-ting, WANG Wan-zhen *, GUO Ge, WANG Wei-tao, SUN Shao-jiang |
| 关键词: | 箱型柱-H型钢梁节点; 椭球面断裂模型; 椭球面屈服模型; 扩大头; 塑性转角; 承载力 |
| Keywords: | joints of steel box column and H-style steel beam; elliptical fracture model; elliptical yield model; enlarged junctures; plastic rotation; load bearing capacity |
| 分类号: | TU391 |
| 文献标识码: | A |
| 摘要: | 为研究箱型柱-H型钢梁节点在强震时的脆断机理和延性节点构造, 对4个隔板贯通式箱型中柱-H型钢梁节点试验(1个常规节点和3个对接焊缝扩大头及梁翼缘圆孔削弱型节点)进行了低周往复循环加载试验和基于结构钢椭球面断裂模型及偶联的椭球面屈服模型的断裂分析. 结果表明: 隔板贯通式箱型中柱-H型钢梁常规节点在应力高度集中的梁翼缘对接焊缝处脆断; 扩大头构造消除了对接焊缝沿梁翼缘宽度的几何突变, 降低了对接焊缝的应力集中程度和脆断风险; 梁翼缘上开设的圆孔构造促使塑性铰形成于远离节点区的梁削弱截面; 对接焊缝扩大头及梁翼缘圆孔削弱型节点的承载力较常规节点降低5.5%~9.4%. |
| Abstract: | In order to study the fracture mechanism, the test on ductile joints of steel box column for the H-style steel beam under the seismic loading and low cyclic reversed loading is conducted on four diaphragm-through type joints of steel box interior column and H-style steel beam, including one conventional joint and three joints with enlarged juncture and opening holes in the beam. The test is based on an elliptical fracture model coupled with an elliptical yield model of constructional steel. The results show that the conventional joint brittle fractures at butt weld between beam flange and diaphragm where the stress is highly concentrated. Enlarged juncture eliminates geometry mutation of butt welds along the beam flange width, and reduces the degree of stress concentration and the risk of brittle fracture of the butt weld. Plastic hinge causes the weaken beam section distant from the panel zone due to the opening holes at beam flanges. The load bearing capacity of the joint with enlarged juncture and opening holes at the beam flanges reduces by 5.5%~9.4% compared with that of the conventional joint. |
| 参考文献 /References: | [1] 李国强, 孙飞飞, 沈祖炎. 强震下钢框架梁柱焊接连接的断裂行为[J]. 建筑结构学报, 1998, 19(4):19-28. [2] 崔鸿超. 日本兵库县南部地区地震震害综述[J]. 建筑结构学报, 1996, 17(1): 2-13. [3] Goswami R, Murty C V R. Externally reinforced welded I-beam-to-box-column seismic connection[J]. Journal of Engineering Mechanics, 2010, 136(1):23-30. [4] Kim T, Stojadinovic B, Whittake A S. Seismic perfor- mance of pre-northridge welded steel moment connec- tions to built-up box columns[J]. Journal of Structural Engineering, 2008, 134(2):289-299. [5] Kim Y J, Oh S H. Effect of moment transfer efficiency of a beam web on deformation capacity at box column-to-H beam connections[J]. Journal of Constructional Steel Research, 2007, 63:24-36. [6] 陈以一, 李刚, 庄磊 等. H型钢梁与钢管柱隔板贯通式连接节点抗震性能试验[J]. 建筑钢结构进展, 2006, 8(1):23-30. [7] 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. [8] GB 50017-2003, 钢结构设计规范[S]. [9] GB 50011-2001, 建筑抗震设计规范[S]. [10] JGJ 99-98, 高层民用建筑钢结构技术规程[S]. [11] GB/T228-2002, 金属材料室温拉伸试验[S]. |
| 备注/Memo: | 收稿日期: 2014-04-20. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省公益性技术应用研究计划（2013C31058）; 浙江省自然科学基金（LY12E08008）; 浙江省151人才工程项目（11-3-079）; 宁波市自然科学基金（2013A610192）. 第一作者: 童科挺（1988－）, 男, 浙江宁波人, 在读硕士研究生, 主要研究方向: 钢结构节点断裂. E-mail: tongketing@126.com *通信作者: 王万祯（1974－）, 男, 河南周口人, 博士/教授, 主要研究方向: 钢结构断裂. E-mail: wangwanzhen1975@sina.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
