外部爆炸荷载作用下网壳结构的动力响应及其影响参数分析
|
摘要
运用ANSYS/LS-DYNA动力有限元软件建立了包含网壳杆件、檩托、檩条、铆钉、屋面板在内的精细化K8型单层球面网壳有限元模型,通过选择考虑材料应变率效应的钢材本构关系,采用流固耦合算法并考虑构件相互碰撞影响,对结构在外部爆炸荷载作用下的动力响应进行了数值模拟,获得了TNT炸药当量、爆炸点距离、杆件截面、矢跨比、支承条件、屋面板厚度、屋面荷载及屋面板形式等参数对结构动力响应的影响规律,可为网壳抗爆防护设计提供参考。网壳结构在外部爆炸荷载作用下,随着各参数取值的变化,存在"完好无损、局部凹陷、局部破坏、整体倒塌"四种破坏类型。
Finite element software ANSYS/LS-DYNA is used to establish a refined kiewitt8 single-layer reticulated shell finite element model,which contains reticulated shell member,purlin hanger,purlin,rivet and roof boarding to simulate the dynamic responses of a structure subjected to external blast loading by using ALE(Arbitrary-Lagrange-Euler) algorithm.The strain rate effect of materials and the inter-collision of the components are considered.The responses of the structure under external eccentric blast loading with varied TNT equivalent weights,explosion point position,section size of reticulated shell bar,rise-span ratio,supporting condition,thickness of roof boarding,roof boarding load and the form of roof boarding are obtained by the comparison of the plastic strain,the plastic development degree and the displacement of the structure,which could provide a reference for reasonable defense design of reticulated shell structure to resisting blast.The results show that with the changes of each parameter,there are four damage modes of kiewitt8 single-layer reticulated shell under external blast loading,that is intact,local deformation,local damage and total collapse.
Finite element software ANSYS/LS-DYNA is used to establish a refined kiewitt8 single-layer reticulated shell finite element model,which contains reticulated shell member,purlin hanger,purlin,rivet and roof boarding to simulate the dynamic responses of a structure subjected to external blast loading by using ALE(Arbitrary-Lagrange-Euler) algorithm.The strain rate effect of materials and the inter-collision of the components are considered.The responses of the structure under external eccentric blast loading with varied TNT equivalent weights,explosion point position,section size of reticulated shell bar,rise-span ratio,supporting condition,thickness of roof boarding,roof boarding load and the form of roof boarding are obtained by the comparison of the plastic strain,the plastic development degree and the displacement of the structure,which could provide a reference for reasonable defense design of reticulated shell structure to resisting blast.The results show that with the changes of each parameter,there are four damage modes of kiewitt8 single-layer reticulated shell under external blast loading,that is intact,local deformation,local damage and total collapse.
引文
[1]Jama H H,Bambach M R,Nurick G N,et al.Numerical modelling of square tubular steel beams subjected to transverse blast loads[J].Thin-Walled Structures,2009,47(12):1523-1534.
[2]Lee K,Kim T,Kim J.Local response of w-shaped steel columns under blast loading[J].Structural Engineering and Mechanics,2009,31(1):25-38.
[3]Sabuwala T,Linzell D,Krauthammer T.Finite element analysis of steel beam to column connections subjected to blast loads[J].InternationalJournal of Impact Engineering,2005,31(7):861-876.
[4]Saatcioglu M,Ozbakkaloglu T,Naumoski N,et al.Response of earthquake-resistant reinforced-concrete buildings to blast loading[J].Canadi-an Journal of Civil Engineering,2009,36(8):1378-1390.
[5]Richard J Y.Survivability of steel frame structures subject to blast and fire[J].Journal of Constructional Steel Research,2008,64(7-8):854–866.
[6]张秀华,段忠东,张春巍.近地空中爆炸作用下钢框架结构冲击响应[J].地震工程与工程振动,2009,29(4):70-76.ZHANG Xiuhua,DUAN Zhongdong,ZHANG Chunwei.Shock responses of steel frame structure near the ground explosion[J].Journal of Earth-quake Engineering and Engineering Vibration,2009,29(4):70-76.(in Chinese)
[7]高轩能,王书鹏.大空间柱面网壳结构在爆炸荷载下的动力响应[J].振动与冲击,2009,28(10):68-73.GAO Xuanneng,WANG Shupeng.Dynamic response of a large-space cylindrical reticulated shell under blast loading[J].Journal of Vibration andShock,2009,28(10):68-73.(in Chinese)
[8]王永辉,翟希梅,支旭东,等.爆炸荷载下K8型单层球面网壳的数值模拟[J].哈尔滨工业大学学报,2011,43(4):12-16.WANG Yonghui,ZHAI Ximei,ZHI Xudong,et al.Numerical simulation of Kiewitt8 single-layer reticulated shell subjected to blast loading[J].Journal of Harbin Institute of Technology,2011,43(4):12-16.(in Chinese)
[9]GB50018-2002冷弯薄壁型钢结构技术规范[S].北京:中国计划出版社,2002.GB 50018-2002 Technical Code of Cold-Formed Thin-Wall Steel Structures[S].Beijing:China Planning Press,2002.(in Chinese)
[10]LS-DYNA keyword user’s manual[M].Livermore Software Technology Corporation.2003.
[11]Fan F,Wang D Z,Zhi XD,et al.Failure modals for single-layer reticulated domes under impact loads[J].Transactions of Tianjin University,2008,14(sup):545-550.
[12]Henrych J.The dynamics of explosion and its use[M].New York:Elsevier,1979.
[13]黄明.K8型单层球面网壳在爆炸荷载下的动力响应及防护措施[D].哈尔滨:哈尔滨工业大学,2012.HUANG Ming.Study on dynamic response and protective measures for kiewitt8 single-layer reticulated shell subjected to blast loading[D].Har-bin:Harbin Institute of Technology,2012.(in Chinese)
[14]GB/T12755-91建筑用压型钢板[S].北京:中国标准出版社,1991.GB/T 12755-91 Profiled Steel Sheet for Building[S].Beijing:Standards Press of China,1991.(in Chinese)
[2]Lee K,Kim T,Kim J.Local response of w-shaped steel columns under blast loading[J].Structural Engineering and Mechanics,2009,31(1):25-38.
[3]Sabuwala T,Linzell D,Krauthammer T.Finite element analysis of steel beam to column connections subjected to blast loads[J].InternationalJournal of Impact Engineering,2005,31(7):861-876.
[4]Saatcioglu M,Ozbakkaloglu T,Naumoski N,et al.Response of earthquake-resistant reinforced-concrete buildings to blast loading[J].Canadi-an Journal of Civil Engineering,2009,36(8):1378-1390.
[5]Richard J Y.Survivability of steel frame structures subject to blast and fire[J].Journal of Constructional Steel Research,2008,64(7-8):854–866.
[6]张秀华,段忠东,张春巍.近地空中爆炸作用下钢框架结构冲击响应[J].地震工程与工程振动,2009,29(4):70-76.ZHANG Xiuhua,DUAN Zhongdong,ZHANG Chunwei.Shock responses of steel frame structure near the ground explosion[J].Journal of Earth-quake Engineering and Engineering Vibration,2009,29(4):70-76.(in Chinese)
[7]高轩能,王书鹏.大空间柱面网壳结构在爆炸荷载下的动力响应[J].振动与冲击,2009,28(10):68-73.GAO Xuanneng,WANG Shupeng.Dynamic response of a large-space cylindrical reticulated shell under blast loading[J].Journal of Vibration andShock,2009,28(10):68-73.(in Chinese)
[8]王永辉,翟希梅,支旭东,等.爆炸荷载下K8型单层球面网壳的数值模拟[J].哈尔滨工业大学学报,2011,43(4):12-16.WANG Yonghui,ZHAI Ximei,ZHI Xudong,et al.Numerical simulation of Kiewitt8 single-layer reticulated shell subjected to blast loading[J].Journal of Harbin Institute of Technology,2011,43(4):12-16.(in Chinese)
[9]GB50018-2002冷弯薄壁型钢结构技术规范[S].北京:中国计划出版社,2002.GB 50018-2002 Technical Code of Cold-Formed Thin-Wall Steel Structures[S].Beijing:China Planning Press,2002.(in Chinese)
[10]LS-DYNA keyword user’s manual[M].Livermore Software Technology Corporation.2003.
[11]Fan F,Wang D Z,Zhi XD,et al.Failure modals for single-layer reticulated domes under impact loads[J].Transactions of Tianjin University,2008,14(sup):545-550.
[12]Henrych J.The dynamics of explosion and its use[M].New York:Elsevier,1979.
[13]黄明.K8型单层球面网壳在爆炸荷载下的动力响应及防护措施[D].哈尔滨:哈尔滨工业大学,2012.HUANG Ming.Study on dynamic response and protective measures for kiewitt8 single-layer reticulated shell subjected to blast loading[D].Har-bin:Harbin Institute of Technology,2012.(in Chinese)
[14]GB/T12755-91建筑用压型钢板[S].北京:中国标准出版社,1991.GB/T 12755-91 Profiled Steel Sheet for Building[S].Beijing:Standards Press of China,1991.(in Chinese)
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