冷弯薄壁型钢T形拼合柱轴压性能研究与承载力计算

冷弯薄壁型钢（CFS）全螺栓垫板连接T形拼合柱是一种新型拼合截面柱，在全螺栓连接框架结构中承受集中荷载，针对目前全螺栓连接T形CFS拼合柱轴心受力性能研究不足的问题。基于已有的试验研究成果，建立准确可靠的T形CFS拼合柱数值分析模型，选取构件长细比λ、板材厚度t、垫板的纵向间距s等参数进行分析，研究各重要参数对T形CFS拼合柱在轴压作用下极限承载力和屈曲模态的影响。结果表明：随着长细比的提高，T形CFS拼合柱的屈曲模式由局部与畸变相关屈曲逐渐转变为整体屈曲，当长细比λ<104.7时，长细比变化对构件承载力的影响不明显；板厚t对构件的承载力变化具有显著影响，在长细比较大的情况下可以改变构件...

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Published inJianzhu Gangjiegou Jinzhan pp. 1 - 12
Main Authors 陈明, 李恒凯, 李补拴, 徐立丹, 兰涛
Format Journal Article
LanguageChinese
Published Editorial Department of Progress in Steel Building Structures, Tongji University 01.01.2024
Subjects
T形CFS拼合柱
冷弯薄壁型钢
屈曲模式
数值分析
直接强度法
轴心受压
Online AccessGet full text
ISSN1671-9379

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Abstract 冷弯薄壁型钢（CFS）全螺栓垫板连接T形拼合柱是一种新型拼合截面柱，在全螺栓连接框架结构中承受集中荷载，针对目前全螺栓连接T形CFS拼合柱轴心受力性能研究不足的问题。基于已有的试验研究成果，建立准确可靠的T形CFS拼合柱数值分析模型，选取构件长细比λ、板材厚度t、垫板的纵向间距s等参数进行分析，研究各重要参数对T形CFS拼合柱在轴压作用下极限承载力和屈曲模态的影响。结果表明：随着长细比的提高，T形CFS拼合柱的屈曲模式由局部与畸变相关屈曲逐渐转变为整体屈曲，当长细比λ<104.7时，长细比变化对构件承载力的影响不明显；板厚t对构件的承载力变化具有显著影响，在长细比较大的情况下可以改变构件的屈曲模式；垫板的纵向间距对构件的承载力和屈曲模式影响较小，不同垫板间距的构件极限承载力变化均在4.5%以内。最后将试验和数值分析结果与北美规范中直接强度法（DSM）计算的名义承载力做对比，评估直接强度法对于此类拼合柱承载力计算的适用性。
AbstractList 冷弯薄壁型钢（CFS）全螺栓垫板连接T形拼合柱是一种新型拼合截面柱，在全螺栓连接框架结构中承受集中荷载，针对目前全螺栓连接T形CFS拼合柱轴心受力性能研究不足的问题。基于已有的试验研究成果，建立准确可靠的T形CFS拼合柱数值分析模型，选取构件长细比λ、板材厚度t、垫板的纵向间距s等参数进行分析，研究各重要参数对T形CFS拼合柱在轴压作用下极限承载力和屈曲模态的影响。结果表明：随着长细比的提高，T形CFS拼合柱的屈曲模式由局部与畸变相关屈曲逐渐转变为整体屈曲，当长细比λ<104.7时，长细比变化对构件承载力的影响不明显；板厚t对构件的承载力变化具有显著影响，在长细比较大的情况下可以改变构件的屈曲模式；垫板的纵向间距对构件的承载力和屈曲模式影响较小，不同垫板间距的构件极限承载力变化均在4.5%以内。最后将试验和数值分析结果与北美规范中直接强度法（DSM）计算的名义承载力做对比，评估直接强度法对于此类拼合柱承载力计算的适用性。
Author 兰涛
陈明
李恒凯
李补拴
徐立丹
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SubjectTerms T形CFS拼合柱
冷弯薄壁型钢
屈曲模式
数值分析
直接强度法
轴心受压
Title 冷弯薄壁型钢T形拼合柱轴压性能研究与承载力计算
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