CAJ | 학술논문

基于非平稳随机地震动模型，编制快速合成人工地震动的程序以实现对工程地震动的随机抽样。对工程岩体地震响应进行等效线性数值计算时，定义结构面的水平等效加速度(时程)，将结构面水平等效加速度(时程)的最大值超过其屈服加速度(滑移阈值)作为岩体失稳的极限条件；基于地震动随机抽样和等效线性化时程计算，提出一种随机地震动作用下工程岩体沿结构面的滑移概率和稳定可靠度的计算方法。考察某工程岩体在附近3个潜在震源影响下的结构面的滑移概率和稳定可靠性。结果表明，震级相差不大时，远场地震诱发该工程岩体的失效概率小于0.01%；近场地震作用下，工程岩体的失效概率为26.1%。
기우비평은수궤지진동모형，편제쾌속합성인공지진동적정서이실현대공정지진동적수궤추양。대공정암체지진향응진행등효선성수치계산시，정의결구면적수평등효가속도(시정)，장결구면수평등효가속도(시정)적최대치초과기굴복가속도(활이역치)작위암체실은적겁한조건；기우지진동수궤추양화등효선성화시정계산，제출일충수궤지진동작용하공정암체연결구면적활이개솔화은정가고도적계산방법。고찰모공정암체재부근3개잠재진원영향하적결구면적활이개솔화은정가고성。결과표명，진급상차불대시，원장지진유발해공정암체적실효개솔소우0.01%；근장지진작용하，공정암체적실효개솔위26.1%。
Based on non-stationary random vibration model, a series of ground motions were synthesized, whose statistical parameters could satisfy the randomness of a potential earthquake. In order to evaluate the stability of engineering rock mass, horizontal equivalent acceleration (HEA) of the rock mass joint plane was defined, while the earthquake response of engi-neering rock mass was calculated numerically. The maximum horizontal equivalent acceleration (MHEA) was compared with the yield acceleration of the rock mass joint plane. Based on non-linear numerical calculations and ground motion samples of an earthquake, a new approach was proposed to calculate the probability density of the MHEA of rock mass joint plane. The application of this method in seismic reliability analysis of engineering rock mass was demonstrated. The numerical computa-tion results indicate that the probability of rock mass instability under remote earthquake is below 0. 01% , while the value is up to 26. 1% under near earthquake, given the same magnitude of earthquake.