摘要
根据对已使用了10、20、40年的既有混凝土圆柱体试件进行单轴抗压试验,测得17条应力-应变全过程曲线,并与相同强度的新混凝土应力-应变曲线对比回归出了不同使用年限既有混凝土的应力-应变全曲线方程。试验结果为既有混凝土结构进行非线性分析,预估其使用寿命和对其进行加固改造提供了理论依据。
The equation of concrete compressive stress-strain curves is its most basic constitutive relation,which is the basis for multi-axial constitutive model.This paper describes a series of tests carried out on the uniaxial compression of existing concrete that had been in service for 10,20 and 40 years,respectively,and 17 complete stress-strain curves in total were obtained.Comprised with stress-strain curves of the fresh concrete,complete stress-strain curves of the existing concrete with different service lives were gained.Test results can offer a theoretical foundation about non-linear analysis,estimate of its service life and reconstruction and reinforcement for existing concrete structures.
出处
《低温建筑技术》
2010年第6期47-49,共3页
Low Temperature Architecture Technology
基金
黑龙江科技学院引进高层次人才科研启动基金项目(04-20)资助
黑龙江省教育厅科学项目(11531329)
