| 焊接箱形截面稳定承载力的直接强度设计法 |
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| 引用本文： | 刘涛,郭彦林.焊接箱形截面稳定承载力的直接强度设计法[J].工业建筑,2009,39(9). |
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| 作者姓名： | 刘涛 郭彦林 |
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| 作者单位： | 清华大学土木工程系,北京,100084 |
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| 摘 要： | 现行GB 50017—2003《钢结构设计规范》对焊接箱形截面构件在考虑壁板局部失稳后的稳定极限承载力的设计规定还相当粗糙,按腹板高度边缘范围内两侧宽度各为20tw计算有效面积,未能与构件整体稳定性建立有效的联系。采用板壳单元,精确地模拟了箱形截面构件的壁板局部失稳及其相互作用,在大挠度、弹塑性范围内对箱形截面的稳定极限承载性能进行了研究。在大量数值分析的基础上,分别归纳总结了箱形截面构件在承受轴向压力、纯弯曲以及弯矩与轴力共同作用下的稳定极限承载力简化计算公式,对箱形截面构件稳定承载力计算及设计有参考价值。这种把构件稳定承载力设计与构件几何尺寸建立直接关系的直接强度设计法,会改进采用有效宽度法产生的误差,可以为薄壁结构相关技术规程修订时参考。
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| 关 键 词： | 箱形截面 稳定承载力 设计公式 |
DIRECT STRENGTH METHOD OF WELDED BOX-SECTION FOR PREDICTING ULTIMATE LOAD-CARRYING CAPACITY |
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| Liu Tao,Guo Yanlin.DIRECT STRENGTH METHOD OF WELDED BOX-SECTION FOR PREDICTING ULTIMATE LOAD-CARRYING CAPACITY[J].Industrial Construction,2009,39(9). |
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| Authors: | Liu Tao Guo Yanlin |
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| Affiliation: | Department of Civil Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The accurate prediction of ultimate load-carrying capacity of welded box section subjected to local plate buckling has still not established in the current Chinese Code for Design of Steel Structure.This paper presents a direct strength method for predicting accurately ultimate load-carrying capacity of locally buckled box section under axial load,pure moment and their combination,respectively.A finite shell element is employed to exactly simulate the sectional geometric shape and boundary conditions,with i... |
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| Keywords: | box section ultimate load-carrying capacity design formula |
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