五邑大学学报（自然科学版）
五邑大學學報（自然科學版）
오읍대학학보（자연과학판）
Journal of Wuyi University(Natural Science Edition)
2015年
3期
39-44
,共6页
黄诗渊%李书杰%王列健%邓增凯
黃詩淵%李書傑%王列健%鄧增凱
황시연%리서걸%왕렬건%산증개
耦合地震%阶梯型边坡%多土层边坡%动力稳定性
耦閤地震%階梯型邊坡%多土層邊坡%動力穩定性
우합지진%계제형변파%다토층변파%동력은정성
coupling earthquake%ladder-type slopes%multiple layers%dynamic stability
对某阶梯型多土层边坡,采用原始记录的EI centro水平、竖向地震波作为地震动输入条件,引入位移、速度、加速度等 3量的放大系数对边坡坡面的动力响应特性进行描述,并进行动力稳定性分析. 计算结果表明:在地震作用下,边坡坡面质点的位移、速度随高程的增加呈增大的趋势,而加速度随高程的增加呈不规则变化;耦合地震作用下的动力响应比水平地震更为剧烈;在耦合地震作用下,坡面质点的水平三量峰值与竖向三量峰值之比的大小顺序为:速度(3.59)>位移(2.66)>加速度(2.20);采用两种动力稳定性分析方法计算的安全系数大致相同,计算结果相差在 5%以内,且耦合地震作用下的安全系数要略小于水平地震作用下的安全系数,说明在工程上需要考虑耦合地震的影响.
對某階梯型多土層邊坡,採用原始記錄的EI centro水平、豎嚮地震波作為地震動輸入條件,引入位移、速度、加速度等 3量的放大繫數對邊坡坡麵的動力響應特性進行描述,併進行動力穩定性分析. 計算結果錶明:在地震作用下,邊坡坡麵質點的位移、速度隨高程的增加呈增大的趨勢,而加速度隨高程的增加呈不規則變化;耦閤地震作用下的動力響應比水平地震更為劇烈;在耦閤地震作用下,坡麵質點的水平三量峰值與豎嚮三量峰值之比的大小順序為:速度(3.59)>位移(2.66)>加速度(2.20);採用兩種動力穩定性分析方法計算的安全繫數大緻相同,計算結果相差在 5%以內,且耦閤地震作用下的安全繫數要略小于水平地震作用下的安全繫數,說明在工程上需要攷慮耦閤地震的影響.
대모계제형다토층변파,채용원시기록적EI centro수평、수향지진파작위지진동수입조건,인입위이、속도、가속도등 3량적방대계수대변파파면적동력향응특성진행묘술,병진행동력은정성분석. 계산결과표명:재지진작용하,변파파면질점적위이、속도수고정적증가정증대적추세,이가속도수고정적증가정불규칙변화;우합지진작용하적동력향응비수평지진경위극렬;재우합지진작용하,파면질점적수평삼량봉치여수향삼량봉치지비적대소순서위:속도(3.59)>위이(2.66)>가속도(2.20);채용량충동력은정성분석방법계산적안전계수대치상동,계산결과상차재 5%이내,차우합지진작용하적안전계수요략소우수평지진작용하적안전계수,설명재공정상수요고필우합지진적영향.
The dynamic response characteristics of a ladder-type heterogeneous slope with multiple layers were characterized by using the original records of El centro horizontal and vertical seismic waves as a condition of the ground motion input and introducing the three volume amplification factors of displacement, speed, and accelerated speed and a dynamic stability analysis was made. The results show that: under the action of seismic waves, the displacement of the mass points on the surface of the side slope and the speed increase with the increase of elevation while the acceleration became irregular with the increase of the elevation; the dynamic response under the action of coupling seismic waves was more intense than under the action of horizontal seismic waves; under the action of coupling seismic waves, the size order of the ratio of the horizontal three-peak value to the vertical three-peak value of the mass points on the slope surface was: speed (3.59) > displacement (2.66) > acceleration (2.2); the safety coefficient derived by two dynamic stability analysis methods were roughly the same and the difference of the calculation results was within 5%, and the safety factors under the action of coupling seismic waves was less than that under the action of horizontal seismic waves. Thus the impact of coupling seismic waves should be taken into consideration in engineering.
