the steady of grottoes attacked by earthquake is analyzed with the engineering soft named adina, in order to show where the weak parts of grottoes are and time-history curves of the horizontal displacement of the easily damaged nodes and time-history curves of first and third principal stress of the easily damaged elements (3)以大型adina有限元分析軟件為基礎(chǔ),編制了預(yù)應(yīng)力錨索材料的非線性有限元計(jì)算程序模塊,研究石窟在地震作用下的穩(wěn)定性問(wèn)題。選取能代表石窟整體結(jié)構(gòu)的三個(gè)不同剖面作為有限元計(jì)算模型,并采用不同工程特性的地震動(dòng)加速度時(shí)程作為荷載輸入。