【摘要】：為了驗(yàn)證傾斜加載方式導(dǎo)致滑坡失穩(wěn)過(guò)程發(fā)生的應(yīng)力場(chǎng)變化是否與原型相似,通過(guò)建立傾斜模型和原型滑坡的數(shù)值模型,觀(guān)察破壞過(guò)程中應(yīng)力應(yīng)變場(chǎng)的相近程度,并引入基于Mohr-Coulomb屈服準(zhǔn)則的破壞接近度函數(shù)這一概念,把每個(gè)單元的矢量信息轉(zhuǎn)換為標(biāo)量信息,得到2個(gè)模型的破壞接近度值相關(guān)系數(shù),以相關(guān)系數(shù)的大小來(lái)評(píng)價(jià)模型與原型破壞過(guò)程中應(yīng)力場(chǎng)的相似性。以千將坪滑坡為例,得出2個(gè)數(shù)值模型的破壞接近度指標(biāo)變化趨勢(shì)大致相同;且當(dāng)折減系數(shù)為1.85,傾斜角度為[7°,8.9°]時(shí),相關(guān)系數(shù)范圍是[0.7,1.0],表明傾斜模型與原型破壞時(shí)的應(yīng)力場(chǎng)相似,證明了傾斜加載方式能較好地重現(xiàn)滑坡的發(fā)生過(guò)程。
[Abstract]:In order to verify whether the stress field changes in the process of landslide instability caused by inclined loading are similar to those of the prototype, the slope model and the numerical model of the prototype landslide are established to observe the similarity of the stress and strain fields in the process of failure. The concept of failure proximity function based on Mohr-Coulomb yield criterion is introduced. The vector information of each element is transformed into scalar information, and the correlation coefficient of failure proximity value of two models is obtained. The similarity of the stress field between the model and the prototype failure process is evaluated by the magnitude of the correlation coefficient. Taking Qianbangping landslide as an example, the variation trend of the damage proximity index of the two numerical models is approximately the same, and when the reduction coefficient is 1.85 and the inclination angle is [7 擄~ 8.9 擄], the correlation coefficient range is [0.71.0], which indicates that the stress field of the slope model is similar to that of the prototype failure. It is proved that the inclined loading mode can reproduce the occurrence process of landslide.
【作者單位】： 三峽大學(xué)土木與建筑學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41272310) 湖北省科技支撐計(jì)劃項(xiàng)目(2013BEC005,2015BCE038)
【分類(lèi)號(hào)】：P642.22

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