爆炸荷载作用下碳纤维布加固梁的数值模拟  

NUMBER SIMULATION OF STRENGTHENING BEAM WITH CARBON FIBER SHEET IN EXPLOSION LOAD

作　　者：胡青军[1] 

机构地区：[1]沈阳军区空军后勤部机场营房处,沈阳110015

出　　处：《建筑技术开发》2010年第3期7-9,共3页Building Technology Development

摘　　要：对爆炸荷载作用下的碳纤维布加固钢筋混凝土梁进行了动力有限元分析,通过分析钢筋混凝土和碳纤维材料的本构关系,利用大型有限元程序ANSYS/LS-DYNA建立有限元模型并进行了数值模拟计算。研究了碳纤维布用量和荷载峰值对碳纤维布加固混凝土结构梁的动力性能的影响,结果表明,碳纤维布加固明显地降低了梁的挠度,碳纤维布越厚,降低程度也就越大,但钢板的厚度不是越厚越好;荷载峰值越大,结构的挠度也越大,而碳纤维布加固梁比普通结构能承受更大的荷载,可显著提高其整体刚度和强度,极大地增强了钢筋混凝土梁的整体抗爆性能和整体抗力。Using dynamic Finite Element Analysis, reinforced concrete strengthening beam with carbon fiber sheet in explosion load is researched, through analyzed the constitutive relation of reinforced concrete and carbon fiber material, a finite-element model is build using large finite element program ANSYS/LS-DYNA, and has carried on the numerical simulation calculation. The effect by the amount of carbon fiber sheet and peak load about dynamic performance of reinforced concrete structural strengthening beam with carbon fiber sheet were studied, the results showed that, carbon fiber sheet strengthening reduces deflection of the beam evidently, the carbon fiber sheet has been thicker,the degree to be more, but thickness of steel plan is not better to greater thickness, the more peak load, the more deflection of the structure, so strengthening beam with carbon fiber sheet can support more loading than ordinary structure, improve stiffness and deflection of the whole structure evidently, strengthen overall antiknock performance and overall resistance of reinforced concrete beam enormously.

关 键 词：爆炸荷载 碳纤维布加固 简支梁 本构方程 数值模拟 

分 类 号：TU312[建筑科学—结构工程]