CAJ | 학술논문

通过对混凝土-岩石胶结面剪切破坏过程中剪应力-位移曲线的分析，假设混凝土-岩石胶结面剪应力由混凝土与岩石之间的胶结作用和摩擦效应共同承担，从而建立考虑峰后胶结损伤的胶结面力学模型。室内混凝土-岩石剪切试验结果的反演分析表明，该模型可以很好地反映胶结面剪切破坏过程。利用建立的混凝土-岩石胶结面力学模型，对拟建的芙蓉江大桥拱座抗滑稳定性进行三维计算分析，结果表明：桥梁荷载下拱座-基岩胶结面剪切应力小于其抗剪强度，胶结面变形以弹性变形为主，量值较小，拱座-基岩胶结面不会产生剪切破坏。
통과대혼응토-암석효결면전절파배과정중전응력-위이곡선적분석，가설혼응토-암석효결면전응력유혼응토여암석지간적효결작용화마찰효응공동승담，종이건립고필봉후효결손상적효결면역학모형。실내혼응토-암석전절시험결과적반연분석표명，해모형가이흔호지반영효결면전절파배과정。이용건립적혼응토-암석효결면역학모형，대의건적부용강대교공좌항활은정성진행삼유계산분석，결과표명：교량하재하공좌-기암효결면전절응력소우기항전강도，효결면변형이탄성변형위주，량치교소，공좌-기암효결면불회산생전절파배。
Based on the analysis of shear stress-displacement curve of cemented concrete-rock joint,an assumption is proposed that the shear stress of cemented concrete-rock joint is dependent on the bonding strength and the friction effect of the cohesive interface. A new model of cemented concrete-rock joint considering the bonding degradation after peak stress is therefore established. The comparison of results of back analysis using the proposed model with ones from shear tests shows that the proposed model could describe the entire process of failure of cemented concrete-rock joint. Besides,a stability analysis of the foundation of Furongjiang Bridge is carried out using the proposed model. The numerical results show that the shear stress between the skewback and the bedrock from the bridge loading is smaller than its shear strength;and the shear displacement has a very low value,which indicates a safe bridge foundation.