混凝土框架结构中楼板抗连续性倒塌效应的分析
|
摘要
针对钢筋混凝土框架结构,采用解析法,结合混凝土框架结构连续倒塌过程和抗力机制,分析了现浇楼板对结构抗连续性倒塌性能的影响,提出了考虑楼板效应的抗力计算方法。采用非线性静力Pushover方法分析现浇楼板对混凝土框架结构抗连续倒塌性能的影响,验证了解析法分析的正确性。结果表明,楼板对梁机制抗力的影响不明显,但对悬链线机制抗力的影响显著。对于边中柱初始失效情形,同时存在梁机制和悬链线机制两种抗连续倒塌机制,楼板可明显提高结构抗倒塌能力;对于角柱初始失效情形,仅存在梁机制而不能形成悬链线机制,楼板对结构的抗倒塌能力基本无影响。
On the basis of process and resistance mechanism of progressive collapse for reinforced concrete frame structures,we analyzed the progressive collapse effect of cast-in-situ floor slab using the analytic method in this paper.Calculational method of resistance was given by considering floor slab effect.The influence of cast-in-situ floor slab on progressive collapse were also investigated by non-linear static pushover method,which verified the validity of the analytic method.The results indicated that the effect was not obvious on the beam mechanism resistance,but significant on the catenary mechanism resistance;in the case of the initial local damage of the middle-side column of the first floor,the progressive collapse resistance consisted of the beam mechanism and the catenary mechanism.Therefore,floor slab might provide the progressive collapse resistance.For the initial local damage of the corner column,only the beam mechanism could work without the catenary mechanism.Floor slab hawas found no effect on the progressive collapse resistance.
On the basis of process and resistance mechanism of progressive collapse for reinforced concrete frame structures,we analyzed the progressive collapse effect of cast-in-situ floor slab using the analytic method in this paper.Calculational method of resistance was given by considering floor slab effect.The influence of cast-in-situ floor slab on progressive collapse were also investigated by non-linear static pushover method,which verified the validity of the analytic method.The results indicated that the effect was not obvious on the beam mechanism resistance,but significant on the catenary mechanism resistance;in the case of the initial local damage of the middle-side column of the first floor,the progressive collapse resistance consisted of the beam mechanism and the catenary mechanism.Therefore,floor slab might provide the progressive collapse resistance.For the initial local damage of the corner column,only the beam mechanism could work without the catenary mechanism.Floor slab hawas found no effect on the progressive collapse resistance.
引文
[1]HAYES JR,JOHN R,WOODSON,et al.Can Strengthening for Earthquake Improve Blast and Progressive Collapse Resistance?[J].Journal of Structural Engineering,2005,131:1157-1177.
[2]SASANI,Mehrdad,Bazan,Marlon,Sagiroglu,Serkan.Experimental and Analytical Progressive Collapse Evaluation of Actual Reinforced Concrete Structure[J].ACI Structural Journal,v 104,n 6,November/December,2007:731-739.
[3]SEFFEN K A.Progressive Collapse of the World Trade Center:Simple analysis[J].Journal of Engineering Mechanics,v 134,n 2,February,2008:125-132.
[4]BAO,Yihai,Kunnath,Sashi K.,El-Tawil,Sherif;Lew,H.S.Macromodel-based simulation of progressive collapse:RC frame structures[J].Journal of Structural Engineering,v 134,n 7,2008:1079-1091.
[5]GENERAL Services Administration.Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects[S].Washington DC:GSA,2003.
[6]Department of Defense.Unified Facilities Criteria:Design of buildings to resist progressive collapse[S].2010.
[7]陆新征,江见鲸.世界贸易中心飞机撞击后倒塌过程的仿真分析[J].土木工程学报,2001,34(6):8-10.
[8]张雷明,刘西拉.钢筋混凝土结构倒塌分析的前沿研究[J].地震工程与工程振动,2003,23(3):47-52.
[9]易伟建,何庆锋,肖岩.钢筋混凝土框架结构抗倒塌性能的试验研究[J].建筑结构学报,2007,28(5):104-109.
[10]师燕超,李忠献,郝洪.爆炸荷载作用下钢筋混凝土框架结构的连续倒塌分析[J].解放军大学学报:自然科学版,2007,8(6):652-658.
[11]胡庆昌.结构的坚固性及钢筋混凝土房屋防连续倒塌设计概念[J].建筑结构,2008,38(1):1-3.
[12]叶列平,陆新征,李易,等.混凝土框架结构的抗连续性倒塌设计方法[J].建筑结构,2010,40(2):1-7.
[13]Jingang Xiong,Yan Li,Zhaoqiang Wu,et al,Mechanism of Progressive Collapse Resistance of Reinforced Concrete Spatial Frame Structure,the 12th International Symposium on Structural Engineering[C].pp 1390-1394,Wuhan,2012.
[14]熊进刚,吴赵强,邹园,等.钢筋混凝土空间框架结构抗连续倒塌机制研究[J].建筑结构,2013,43(9):105-108.
[15]吕大刚,崔双双,李雁军,等.基于备用荷载路径Pushover方法的结构连续倒塌鲁棒性分析[J].建筑结构学报,2010,(S2):112-118.
[2]SASANI,Mehrdad,Bazan,Marlon,Sagiroglu,Serkan.Experimental and Analytical Progressive Collapse Evaluation of Actual Reinforced Concrete Structure[J].ACI Structural Journal,v 104,n 6,November/December,2007:731-739.
[3]SEFFEN K A.Progressive Collapse of the World Trade Center:Simple analysis[J].Journal of Engineering Mechanics,v 134,n 2,February,2008:125-132.
[4]BAO,Yihai,Kunnath,Sashi K.,El-Tawil,Sherif;Lew,H.S.Macromodel-based simulation of progressive collapse:RC frame structures[J].Journal of Structural Engineering,v 134,n 7,2008:1079-1091.
[5]GENERAL Services Administration.Progressive collapse analysis and design guidelines for new federal office buildings and major modernization projects[S].Washington DC:GSA,2003.
[6]Department of Defense.Unified Facilities Criteria:Design of buildings to resist progressive collapse[S].2010.
[7]陆新征,江见鲸.世界贸易中心飞机撞击后倒塌过程的仿真分析[J].土木工程学报,2001,34(6):8-10.
[8]张雷明,刘西拉.钢筋混凝土结构倒塌分析的前沿研究[J].地震工程与工程振动,2003,23(3):47-52.
[9]易伟建,何庆锋,肖岩.钢筋混凝土框架结构抗倒塌性能的试验研究[J].建筑结构学报,2007,28(5):104-109.
[10]师燕超,李忠献,郝洪.爆炸荷载作用下钢筋混凝土框架结构的连续倒塌分析[J].解放军大学学报:自然科学版,2007,8(6):652-658.
[11]胡庆昌.结构的坚固性及钢筋混凝土房屋防连续倒塌设计概念[J].建筑结构,2008,38(1):1-3.
[12]叶列平,陆新征,李易,等.混凝土框架结构的抗连续性倒塌设计方法[J].建筑结构,2010,40(2):1-7.
[13]Jingang Xiong,Yan Li,Zhaoqiang Wu,et al,Mechanism of Progressive Collapse Resistance of Reinforced Concrete Spatial Frame Structure,the 12th International Symposium on Structural Engineering[C].pp 1390-1394,Wuhan,2012.
[14]熊进刚,吴赵强,邹园,等.钢筋混凝土空间框架结构抗连续倒塌机制研究[J].建筑结构,2013,43(9):105-108.
[15]吕大刚,崔双双,李雁军,等.基于备用荷载路径Pushover方法的结构连续倒塌鲁棒性分析[J].建筑结构学报,2010,(S2):112-118.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心