【摘要】：運(yùn)用有限差分軟件FLAC~(3D),建立了呷爬滑坡體三維模型,分別施加1倍和3倍El-Centro地震波。計(jì)算結(jié)果表明,1倍地震波作用下會(huì)發(fā)生一定的永久位移,但不會(huì)滑動(dòng)失穩(wěn);3倍地震波作用下將發(fā)生滑動(dòng)失穩(wěn)。進(jìn)一步發(fā)現(xiàn)邊坡在1倍和3倍地震波激勵(lì)下的變形滑移特征不同,第一種情況屬于累積效應(yīng)階段,變形主要集中于滑體Ⅲ,第二種情況屬于觸發(fā)效應(yīng)階段,滑體Ⅰ的滑動(dòng)變形同樣劇烈。文中從滑坡體的組成物質(zhì)和材料參數(shù)、滑動(dòng)區(qū)域的地形因素和滑動(dòng)區(qū)域的動(dòng)力響應(yīng)三方面進(jìn)行了分析。運(yùn)用Newmark有限滑動(dòng)位移法,基于滑體Ⅰ和滑體Ⅲ的加速度響應(yīng)時(shí)程,計(jì)算了兩者的永久位移,結(jié)果與數(shù)值計(jì)算吻合良好。表明滑體Ⅲ處的動(dòng)力響應(yīng)會(huì)產(chǎn)生更大的永久位移,從而驗(yàn)證了數(shù)值計(jì)算的結(jié)果。同時(shí),基于結(jié)構(gòu)動(dòng)力響應(yīng)而計(jì)算得到的永久位移也可以作為衡量地震作用對(duì)該處結(jié)構(gòu)變形影響的指標(biāo),從而估計(jì)地震對(duì)局部結(jié)構(gòu)的破壞作用。
[Abstract]:Using the finite difference software FLAC~ (3D), the 3D model of the climbing landslide is established, and the seismic waves of 1 and 3 times El-Centro are applied respectively. The results show that a certain permanent displacement will occur under the action of 1 times seismic wave, but there will be no sliding instability, and the sliding instability will occur under the action of 3 times seismic wave. It is further found that the deformation and slip characteristics of the slope under the excitation of 1 and 3 times seismic waves are different. The first case belongs to the cumulative effect stage, the deformation is mainly concentrated in the sliding body 鈪，

本文編號(hào)：2333432