FINITE ELEMENT ANALYSIS OF FOAM PROTECTED RC MEMBERS AGAINST BLAST LOADS

摘要：

　　In this paper a load cladding structure interaction model based on finite element method is developed to simulate response of foam protected RC members to blast loads.In the load cladding structure interaction model,the foam cladding layer over the member is modelled as inelastic springs with nonlinear stiffness and a series of springs are connected at each node of the member.Consequently,the reflected blast pressure is transmitted to the RC member through these series of the springs.The material nonlinearity:in the nonhinge region is incorporated through the flexural rigidities of the member obtained from a nonlinear moment curvature relationship; and in the hinge region using the nonlinear moment rotation relationships directly as spring elements.The nonlinear dynamic equations are solved using the Newmark beta time integration technique in combination with a Newton Raphson iteration technique for handling the nonlinearity in the system.The reflected pressure at any time instant is used to form the load vector at any instant in the time integration process.The coupled load cladding structure interaction modal,was then validated by field blast test data.

关键词： Foam cladding RC beams load cladding structure interaction model blast loads

作者: Chengqing Wu Hamid Sheikh

作者单位: School of Civil Environmental and Mining Engineering, The University of Adelaide, SA 5005, Australia

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 686-691

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）