CAJ | 학술논문

沙土强震后场地液化会产生重大的灾害,在历次地震中已有所呈现.利用 Opensees 程序对单桩在沙土中的地震反应进行计算分析,模型土中,顶部2m 为粘土,以下10m 为沙土,利用集中质量模拟上部结构,El Centro 和正弦波作为模拟地震动输入.计算结果显示:沙土在强震下的孔隙水压力和液化规律与地震波的类型有关,液化后桩身位移和弯矩迅速增大,桩的承载能力下降,表明液化后上部结构可能破坏.
사토강진후장지액화회산생중대적재해,재력차지진중이유소정현.이용 Opensees 정서대단장재사토중적지진반응진행계산분석,모형토중,정부2m 위점토,이하10m 위사토,이용집중질량모의상부결구,El Centro 화정현파작위모의지진동수입.계산결과현시:사토재강진하적공극수압력화액화규률여지진파적류형유관,액화후장신위이화만구신속증대,장적승재능력하강,표명액화후상부결구가능파배.
Some serious damages were presented as sand liquefaction under strong earthquake in previous years.Single pile with concentrated mass on the top loaded by seismic vibration was simulated by Opensees pro -gram.2m below the surface is clay while 10m below the clay is sand for the model.El Centro and sine wave were inputted as seismic vibration .The results show that the types of earthquake have effect on pore water pres -sure and liquefaction.The amplitude of displacement and bending moment increase heavily , which may cause the bearing capacity degenerated owing to the sand liquefaction .