加强与削弱并用型工字形柱弱轴连接节点滞回性能分析

为了减小钢框架梁柱弱轴连接中柱腹板上的应力水平,提出了在梁端加过渡竖板的方式以使得柱翼缘更好地参与受力。同时为了使塑性铰不出现在梁柱连接焊缝处,对梁翼缘进行削弱处理,最终提出了一种新型的梁端加强与削弱并用的梁柱弱轴连接(SWWC)形式,并运用有限元软件ABAQUS对已有的RBS型工字形柱弱轴连接节点的试验进行模拟验证后,对此类节点进行循环荷载作用下的受力性能分析。结果表明:在梁端加过渡竖板可以明显降低节点域的Mises应力水平,使得梁截面的屈曲主要集中在竖向板的外侧;在梁端加过渡竖板的同时对梁翼缘进行削弱处理可以使塑性铰外移;随着削弱深度c的增加,节点的承载力逐渐降低,RBS削弱处的屈曲发展得...

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Published inJianzhu Gangjiegou Jinzhan pp. 84 - 92
Main Authors 刘明明, 徐静伟
Format Journal Article
LanguageChinese
Published Editorial Department of Progress in Steel Building Structures, Tongji University 01.10.2019
Subjects
加强与削弱并用型梁柱连接
弱轴连接
有限元分析
滞回性能
钢框架
Online AccessGet full text
ISSN1671-9379
DOI10.13969/j.cnki.cn31-1893.2019.05.011

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Abstract 为了减小钢框架梁柱弱轴连接中柱腹板上的应力水平,提出了在梁端加过渡竖板的方式以使得柱翼缘更好地参与受力。同时为了使塑性铰不出现在梁柱连接焊缝处,对梁翼缘进行削弱处理,最终提出了一种新型的梁端加强与削弱并用的梁柱弱轴连接(SWWC)形式,并运用有限元软件ABAQUS对已有的RBS型工字形柱弱轴连接节点的试验进行模拟验证后,对此类节点进行循环荷载作用下的受力性能分析。结果表明:在梁端加过渡竖板可以明显降低节点域的Mises应力水平,使得梁截面的屈曲主要集中在竖向板的外侧;在梁端加过渡竖板的同时对梁翼缘进行削弱处理可以使塑性铰外移;随着削弱深度c的增加,节点的承载力逐渐降低,RBS削弱处的屈曲发展得越充分,削弱起始位置至梁端的距离a和削弱区域的长度b对节点的承载力影响会很小,随着参数a或b的增加,梁上塑性铰中心逐渐远离梁翼缘焊缝处;建议削弱参数c=0.17bf,a取值范围为0.65bf～0.70bf,b=0.75hb,其中bf和hb分别为梁翼缘宽度和梁截面高度。
AbstractList 为了减小钢框架梁柱弱轴连接中柱腹板上的应力水平,提出了在梁端加过渡竖板的方式以使得柱翼缘更好地参与受力。同时为了使塑性铰不出现在梁柱连接焊缝处,对梁翼缘进行削弱处理,最终提出了一种新型的梁端加强与削弱并用的梁柱弱轴连接(SWWC)形式,并运用有限元软件ABAQUS对已有的RBS型工字形柱弱轴连接节点的试验进行模拟验证后,对此类节点进行循环荷载作用下的受力性能分析。结果表明:在梁端加过渡竖板可以明显降低节点域的Mises应力水平,使得梁截面的屈曲主要集中在竖向板的外侧;在梁端加过渡竖板的同时对梁翼缘进行削弱处理可以使塑性铰外移;随着削弱深度c的增加,节点的承载力逐渐降低,RBS削弱处的屈曲发展得越充分,削弱起始位置至梁端的距离a和削弱区域的长度b对节点的承载力影响会很小,随着参数a或b的增加,梁上塑性铰中心逐渐远离梁翼缘焊缝处;建议削弱参数c=0.17bf,a取值范围为0.65bf～0.70bf,b=0.75hb,其中bf和hb分别为梁翼缘宽度和梁截面高度。
Author 刘明明
徐静伟
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Snippet 为了减小钢框架梁柱弱轴连接中柱腹板上的应力水平,提出了在梁端加过渡竖板的方式以使得柱翼缘更好地参与受力。同时为了使塑性铰不出现在梁柱连接焊缝处,对梁翼缘进行削弱处...
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SubjectTerms 加强与削弱并用型梁柱连接
弱轴连接
有限元分析
滞回性能
钢框架
Title 加强与削弱并用型工字形柱弱轴连接节点滞回性能分析
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