端部约束对爆炸荷载作用下钢骨-钢管混凝土柱动力响应的影响  

EFFECTS OF END CONSTRAINTS ON DYNAMIC RESPONSE OF STEEL REINFORCED CONCRETE FILLED WITH STEEL TUBE CONCRETE COLUMN UNDER BLAST LOAD

作　　者：王帅[1] 徐亚丰[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《工程力学》2013年第B06期290-293,共4页Engineering Mechanics

基　　金：辽宁省重点实验室开放基金项目(JG-200904);辽宁省教育厅科学研究项目(LS2010131)

摘　　要：钢骨-钢管混凝土柱是建筑结构的主要承重构件,在爆炸冲击荷载作用下,结构的受力特性和反应过程与受静载作用下的结构有着明显的不同。该文采用非线性有限元软件ABAQUS对在爆炸荷载作用下不同端部约束的钢骨-钢管混凝土柱的动力响应进行了数值模拟,混凝土采用损伤塑性模型,考虑了损伤及应变率效应,钢筋采用经典金属塑性模型。结果表明:顶部自由约束的钢骨-钢管混凝土柱的抗爆能力较差,不如顶部固支和顶部简支的钢骨-钢管混凝土柱,而顶部固支和顶部简支的柱体的抗爆能力几乎相同。A steel reinforced concrete filled with steel tube concrete column is the main bearing member of building structures, under the explosive load, the stress characteristic and reaction process of the member are obviously different from those under the static load. The dynamic response on a steel reinforced concrete filled with steel tube concrete column in the condition of different end constraints under a blast load were simulated with the finite element analysis software ABAQUS. Concrete uses a concrete-damaged-plasticity model, considering the damage effect and strain rate effect, reinforced steels uses a classic-metal-plasticity model. The results show that the steel reinforced concrete filled with steel tube concrete column with a free constraint top has worse explosion resisting capacity, and cannot compete that of a steel reinforced concrete filled with steel tube concrete column with a fixed top or a hinged top, and the steel reinforced concrete filled with steel tube concrete column with a fix top or a hinged one has almost identical explosion resisting capacity.

关 键 词：钢骨-钢管混凝土柱 端部约束 数值模拟 爆炸荷载 动力响应 

分 类 号：TU398.9[建筑科学—结构工程]