A New Formula for Loading Capacity of Unstiffened CHS K joints

doi:10.3969/j.issn.0253-374x.2012.04.003

Home > Archive>Volume 40, Issue 4, 2012 >0515-0521. DOI:10.3969/j.issn.0253-374x.2012.04.003

A New Formula for Loading Capacity of Unstiffened CHS K joints
DOI:
                        10.3969/j.issn.0253-374x.2012.04.003
                    
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                        TONG LeweiTONG Lewei
Department of Building Engineering, Tongji University, Shanghai 200092, China
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SUN JiandongSUN Jiandong
Department of Building Engineering, Tongji University, Shanghai 200092, ChinaShandong Provincial Academy of Building Research, Ji’nan 250031, China
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CHEN YiyiCHEN Yiyi
Department of Building Engineering, Tongji University, Shanghai 200092, China
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Clc Number:TU392.3
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Abstract:

建立了平面K型节点非线性有限元分析模型，综合考虑两支管搭接顺序和内隐蔽部分焊缝是否焊接等影响因素，并得到了试验验证，适应性良好.应用该模型，对4类圆管K型节点型式进行了分析计算，通过多元非线性回归，导出K型节点极限承载力新的计算公式，进而提出承载力设计值建议公式.采用国际管节点数据库中试验数据，与现有国内外规范公式进行比较评价，证明该公式有较高的精度和广泛的适用性，能综合反映影响承载力的诸多因素，公式可同时计算间隙型和搭接K型节点，可计算两腹杆具有不同几何参数以及弦杆有轴力作用的K型节点承载力等特点.

Key words:CHS K joints; gap or overlapped joints; hidden weld; FE modeling; formula of ultimate capacity; nonlinear regression

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TONG Lewei, SUN Jiandong, CHEN Yiyi. A New Formula for Loading Capacity of Unstiffened CHS K joints[J].同济大学学报(自然科学版),2012,40(4):0515~0521

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Received:February 17,2011
Revised:January 09,2012
Adopted:July 25,2011
Online: April 27,2012
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