摘要
基于状态空间理论建立了碳纤维加固钢筋砼梁的层合解析模型。利用该模型计算了碳纤维加固钢筋混凝土梁的挠度、混凝土压应变以及碳纤维表面拉应变等参量,并将计算结果与试验结果进行了比较,两者基本吻合。结果表明:放弃平截面假定后所建立的碳纤维加固混凝土结构的状态空间模型是科学合理的。在结构承载过程中,利用该模型能准确地判断出碳纤维布断裂以及砼压碎等破坏现象的发生。同时,模型的建立为碳纤维加固的复合结构设计提供了一个新的设计思路。
The theoretical model of composite beam was put forward for the concrete structure strengthened with Carbon Fiber Reinforce Polymer(CFRP) sheets based on state space theory.The state space model was established to calculate the deformation,strain and the interface shear stress of concrete structure strengthened with CFRP sheets,and the calculation results are in good agreement with the result of tests.The results show that the state space model of the concrete structure strengthened with CFRP sheets is rational after abandon the plane-section assumption.And the delamination failure,rupture of CFRP and crush of concrete can be forecasted during the construction of strengthening concrete beams with CFRP loads.Meanwhile,the proposed model can provide a new design idea for the concrete structure strengthened with CFRP sheets.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2009年第S2期209-214,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
交通部联合攻关项目(2003353322100)
高等学校博士学科点专项科研基金项目(20050183037)
关键词
道路工程
层合梁
碳纤维布
钢筋砼梁
状态空间理论
road engineering
composite beam
carbon fiber reinforced polymer(CFRP) sheets
concrete beam
state space theory
