钢框架结构连续倒塌分析评估方法研究
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摘要
基于GSA规范中的静力线弹性法对5跨6层平面钢框架结构的抗连续倒塌性能进行初步分析评估;根据组件单元法建立考虑节点受力的钢框架模型,分别采用动力非线性法和静力非线性法对结构进行连续倒塌分析。结果表明:静力线弹性法的分析结果偏保守,可用于对结构抗倒塌性能的初步分析评估;静力非线性法和动力非线性法的评估结果一致,可用于对结构抗倒塌性能的进一步精确分析评估,但静力非线性法不能准确反映剩余结构的受力状态。基于三种方法的分析结果和特点,提出钢框架结构连续倒塌分析评估流程。
The anti-collapse performance of a steel frame with 5 spans and 6 stories is analyzed and evaluated by the static linear elastic analysis method according to GSA Code. Based on the component-based method,the planer steel frame model which can reflect beam-column joint behavior is established. The dynamic nonlinear analysis method and static nonlinear analysis method are used to analyze and evaluate the anti-collapse performance of steel frame model separately. The results show the static linear elastic analysis method is conservative and can be used to preliminarily analyze or evaluate the anti-collapse performance of steel frames. The evaluation results of static nonlinear analysis method and dynamic nonlinear analysis method are similar,while the static nonlinear analysis method results cannot reflect the stress state of the remaining structure accurately. The static nonlinear analysis method and dynamic nonlinear analysis method can be used as accurate methods to analyze or evaluate the anti-collapse performance of steel frames. The progressive collapse analysis and evaluation process is proposed based on the results and characteristics of static linear elastic analysis method,static nonlinear analysis method and dynamic nonlinear analysis method.
The anti-collapse performance of a steel frame with 5 spans and 6 stories is analyzed and evaluated by the static linear elastic analysis method according to GSA Code. Based on the component-based method,the planer steel frame model which can reflect beam-column joint behavior is established. The dynamic nonlinear analysis method and static nonlinear analysis method are used to analyze and evaluate the anti-collapse performance of steel frame model separately. The results show the static linear elastic analysis method is conservative and can be used to preliminarily analyze or evaluate the anti-collapse performance of steel frames. The evaluation results of static nonlinear analysis method and dynamic nonlinear analysis method are similar,while the static nonlinear analysis method results cannot reflect the stress state of the remaining structure accurately. The static nonlinear analysis method and dynamic nonlinear analysis method can be used as accurate methods to analyze or evaluate the anti-collapse performance of steel frames. The progressive collapse analysis and evaluation process is proposed based on the results and characteristics of static linear elastic analysis method,static nonlinear analysis method and dynamic nonlinear analysis method.
引文
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[8]GB 50017-2003,钢结构设计规范[S]
[9]GB 50011-2010,建筑抗震设计规范[S]
[10]毕永辉,马克俭,才琪.基于抽柱法的盒式结构连续倒塌分析[J].贵州大学学报(自然科学版),2017,34(1):89-94
[11]蔡建国,王蜂岚,冯健,等.连续倒塌分析中结构重要构件的研究现状[J].工业建筑,2011,41(10):85-89
[12]谢甫哲.钢框架结构连续倒塌计算分析与评估方法及试验研究[D].南京:东南大学,2012
[13]Fu Qiuni,Yang Bo,Hu Ying,et al.Dynamic analyses of bolted-angle steel joints against progressive collapse based on component-based model[J].Journal of Constructional Steel Research,2016,117(2):161-174
[14]Li Liulian,Li Guoqiang,Jiang Binhui,et al.Analysis of robustness of steel frames against progressive collapse[J].Journal of Constructional Steel Research,2018,143(2):264-278
[15]Izzudin B A,Vlassis A G,Elghazouli A Y.Progressive collapse of multi-storey buildings due to sudden column loss-part1:Simplified assessment framework[J].Engineering Structures,2008,30(5):1308-1318
[2]英明鉴,李易,陆新征,等.极端火灾作用下典型超高层混凝土框架-核心筒结构的连续倒塌分析[J].土木工程学报,2016,49(4):48-56
[3]吕大刚,宋鹏彦,崔双双,等.结构鲁棒性及其评价指标[J].建筑结构学报,2011,32(11):44-54
[4]Ellingwood B R.Mitigating risk from abnormal loads and progressive collapse[J].Journal of Performance of Constructed Facilities,2006,20(4),315-323
[5]GSA 2003 progressive collapse analysis and design guidelines for new federal office buildings and major modernization project[S].US General Services Administration,2003
[6]Marjanishvili S M.Progressive Analysis Procedure for Progressive Collapse[J].Journal of Performance of Constructed Facilities,2004,18(2):79-85
[7]Tsai M H,You Z K.Experimental evaluation of inelastic dynamic amplification factors for progressive collapse analysis under sudden support loss[J].Mechanics Research Communications,2012,40(1):56-62
[8]GB 50017-2003,钢结构设计规范[S]
[9]GB 50011-2010,建筑抗震设计规范[S]
[10]毕永辉,马克俭,才琪.基于抽柱法的盒式结构连续倒塌分析[J].贵州大学学报(自然科学版),2017,34(1):89-94
[11]蔡建国,王蜂岚,冯健,等.连续倒塌分析中结构重要构件的研究现状[J].工业建筑,2011,41(10):85-89
[12]谢甫哲.钢框架结构连续倒塌计算分析与评估方法及试验研究[D].南京:东南大学,2012
[13]Fu Qiuni,Yang Bo,Hu Ying,et al.Dynamic analyses of bolted-angle steel joints against progressive collapse based on component-based model[J].Journal of Constructional Steel Research,2016,117(2):161-174
[14]Li Liulian,Li Guoqiang,Jiang Binhui,et al.Analysis of robustness of steel frames against progressive collapse[J].Journal of Constructional Steel Research,2018,143(2):264-278
[15]Izzudin B A,Vlassis A G,Elghazouli A Y.Progressive collapse of multi-storey buildings due to sudden column loss-part1:Simplified assessment framework[J].Engineering Structures,2008,30(5):1308-1318