支撑对装配式钢框架抗连续倒塌性能影响
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摘要
为研究不同支撑形式对装配式钢框架结构抗连续倒塌性能的影响,建立4种不同支撑形式的模型,利用SAP 2000有限元软件,以6层装配式钢框架结构为原型,并采用构件拆除法,在分别拆除长边中柱、短边中柱、角柱、内柱的4种工况下对模型进行动力非线性分析。分析结果表明:支撑所在跨的框架柱失效后,支撑对结构抗连续倒塌作用明显,隔跨柱失效后,支撑对剩余结构抗连续倒塌性能的影响很小。
To investigate the effects of the different bracings on the resistance of progressive collapse of prefabricated steel frame structures,four finite element models of 6-storey prefabricated steel frame structures with different forms of bracing were established with the finite element software of SAP 2000. By using the method of dismantling member,the nonlinear dynamic analysis of the four models was carried out by removing the middle columns with short side and long side,corner column,and inner column. The results of nonlinear dynamic analysis indicated that the effects of bracings on the resistance of progressive collapse were obvious until the failure of the frame columns occurred at their span; while the bracings had little influence on the resistance of progressive collapse of the residual structures when the spacing span columns were not working.
To investigate the effects of the different bracings on the resistance of progressive collapse of prefabricated steel frame structures,four finite element models of 6-storey prefabricated steel frame structures with different forms of bracing were established with the finite element software of SAP 2000. By using the method of dismantling member,the nonlinear dynamic analysis of the four models was carried out by removing the middle columns with short side and long side,corner column,and inner column. The results of nonlinear dynamic analysis indicated that the effects of bracings on the resistance of progressive collapse were obvious until the failure of the frame columns occurred at their span; while the bracings had little influence on the resistance of progressive collapse of the residual structures when the spacing span columns were not working.
引文
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[12]宋戈,王来.基于连续倒塌工况下间隔空腹桁架式钢框架受力性能分析[J].钢结构,2015,30(12):19-23.
[2]黄鑫,陈俊岭,马人乐.水平加强层对钢框架结构抗连续倒塌性能的影响[J].解放军理工大学报(自然科学版),2012,13(1):80-87.
[3]徐嫚,高山,张力滨,等.中心支撑钢框架连续倒塌动力效应分析[J].土木工程学报,2013(增刊):329-338.
[4]韩宾.X形支撑对钢框架抗连续倒塌性能的影响[J].山东工业技术,2015(3):158-159.
[5]王光超.装配式钢框架抗连续倒塌性能影响因素及分析方法对比研究[D].长沙:湖南大学,2015.
[6]舒兴平,王光超,袁智深,等.斜支撑对装配式钢框架抗连续倒塌性能的影响分析[J].建筑结构,2016(13):72-75.
[7]LIU R,BUICK D,ANDREW T.A Study of Progressive Collapse in Multi-Storey Steel Frames[C]//ASCE Structures Corgress.2005.
[8]SHALVA M,ELIZABETH A.Comparison of Various Procedures for Progressive Collapse Analysis[J].Journal of Performance of Constructed Facilities,2006,20(4):365-374.
[9]General Services Administration.Progressive Collapse Analysis and Design Guidelines for New Federal Office Buildings and Major Modernization Projects[S].Washington,D.C.:GSA,2003.
[10]刁延松,孙玉婷,曹亚东.偏心支撑对高层钢框架结构抗连续倒塌性能的影响[J].钢结构,2016,31(7):53-59.
[11]董立畅.支撑对钢框架抗连续倒塌性能的影响[D].青岛:山东科技大学,2015.
[12]宋戈,王来.基于连续倒塌工况下间隔空腹桁架式钢框架受力性能分析[J].钢结构,2015,30(12):19-23.