CAJ | 학술논문

在地震高发区建设的高混凝土坝，抗震安全问题需要特别关注。通过振动台模型试验研究高拱坝抗震性能时，地震波的卓越频率往往超过了振动台的有效工作范围，常用谐波代替地震波作为试验输入激振波。为得到更可靠的结论，需探讨这种简化方式对于试验结果的影响。为此，采用数值方法对试验进行补充分析，建立与试验模型相应的有限元数值模型，施加与试验相同的谐波荷载，将计算结果与试验结果对比，验证数值方法的有效性。比较不同工况下的计算结果，发现不同地震动输入条件下，模型损伤区域的形状存在差异，但是破坏位置相差不大。说明这种替代方式具有一定的合理性，同时也表明数值计算的补充对于试验结果向原型扩展具有一定的意义。
재지진고발구건설적고혼응토패，항진안전문제수요특별관주。통과진동태모형시험연구고공패항진성능시，지진파적탁월빈솔왕왕초과료진동태적유효공작범위，상용해파대체지진파작위시험수입격진파。위득도경가고적결론，수탐토저충간화방식대우시험결과적영향。위차，채용수치방법대시험진행보충분석，건립여시험모형상응적유한원수치모형，시가여시험상동적해파하재，장계산결과여시험결과대비，험증수치방법적유효성。비교불동공황하적계산결과，발현불동지진동수입조건하，모형손상구역적형상존재차이，단시파배위치상차불대。설명저충체대방식구유일정적합이성，동시야표명수치계산적보충대우시험결과향원형확전구유일정적의의。
There are many high dams in the southwest of China where earthquakes occur frequently ,high dam seismic safety issues need special attention .When study the seismic behavior of the high arch dam by dynamic tests with shaking table model ,the predominant frequency of seismic waves always exceed its effective working input range ,so harmonic waves are usually chosen as the input shock waves instead of actual seismic waves .To get more reliable conclusions ,it is necessary to explore the effects of this simplified method on the test result .To this end ,the numerical simulation method was adopted to analyze the test as a supplement .At first ,a Finite element model corresponding to the test model was cre-ated with the same loads of harmonic waves .The comparison between the calculated results and the test results showed consistency .And then ,the harmonic waves were replaced with the artificial seismic waves in the simulation By compari-son of the test results under different working conditions ,it is found that with different seismic input ,the locations of the damaged areas of the models are similar but the shapes of the areas are different .It indicates that this alternative method is reasonable ,and numerical simulation plays a significant roll in expending the test results to the real structure .