CAJ | 학술논문

在大坝加高中,新老混凝土结合面作为一个结构薄弱面,施工运行中难免产生开裂现象.为了评价开裂对坝体安伞的影响,采用非线性数值分析方法,研究了结合面开裂比例、结合面抗拉和抗剪强度参数等对结构安全的影响.分析结果显示,随着开裂比例增大,结构安全度逐渐减小,但脱开比例变化影响越来越小;结构安全度受未裂结合面抗拉强度、开裂后接触摩擦系数等影响明显,给出了变化规律,提出了建议.
재대패가고중,신로혼응토결합면작위일개결구박약면,시공운행중난면산생개렬현상.위료평개개렬대패체안산적영향,채용비선성수치분석방법,연구료결합면개렬비례、결합면항랍화항전강도삼수등대결구안전적영향.분석결과현시,수착개렬비례증대,결구안전도축점감소,단탈개비례변화영향월래월소;결구안전도수미렬결합면항랍강도、개렬후접촉마찰계수등영향명현,급출료변화규률,제출료건의.
Cracks will appear during construction and operation period in the weak old-new concrete interfaces on heightened dams. In order to evaluate the influence of cracks on dam safety, nonlinear numerical methods was used to study the influence of crack ratio, tension strength and shear strength of the interface. The results showed that dam safety factor and the influence of ratio change on safety factor will decrease with the crack ratio increasing. The safety factor was also influenced obviously by tension strength of interface and friction coefficient. Finally, disciplines and advices were given.