CAJ | 학술논문

针对时程分析法进行结构抗震研究时输入地震波的选择和设计问题，研究了复杂立交中桥梁结构应用时程分析进行抗震设防时地震输入的选择和人工合成。对复杂立交桥梁提出“2组”+“1组”，且任意两组间同方向时程相关系数的绝对值小于0.1的输入地震波选择原则；建立了一种规范化的拟场地人工地震波的合成方法，并根据提出的数学模型编制了相应的计算程序。以某立交枢纽工程中的一座长曲线匝道桥梁结构为例，进行了地震输入的选择和人工合成。结果表明：所提出的“通过规范设计反应谱的幅频特性和拟建场地天然地震动的相频特性”人工合成的地震波，既含有天然地震记录所具有的频域非平稳特性，又符合现行公路桥梁抗震设计规范中设计反应谱的规定，是一种更为真实、规范的人工地震输入合成方法，值得推荐使用。
침대시정분석법진행결구항진연구시수입지진파적선택화설계문제，연구료복잡입교중교량결구응용시정분석진행항진설방시지진수입적선택화인공합성。대복잡입교교량제출“2조”+“1조”，차임의량조간동방향시정상관계수적절대치소우0.1적수입지진파선택원칙；건립료일충규범화적의장지인공지진파적합성방법，병근거제출적수학모형편제료상응적계산정서。이모입교추뉴공정중적일좌장곡선잡도교량결구위례，진행료지진수입적선택화인공합성。결과표명：소제출적“통과규범설계반응보적폭빈특성화의건장지천연지진동적상빈특성”인공합성적지진파，기함유천연지진기록소구유적빈역비평은특성，우부합현행공로교량항진설계규범중설계반응보적규정，시일충경위진실、규범적인공지진수입합성방법，치득추천사용。
In the time-history analysis for structure seismic research, the kind of stimulus input to be selected and designed is an extremely important issue. The selection and synthesis of the earthquake stimulus inputs for bridge structures in a complicated interchange system were studied. The selective principles that “two groups” plus “one group”, and the correlation coefficient less than 0. 1 between the two groups in the same direction were put forward. A new method to synthesize the earthquake wave that includes field characteristics was built, and its corresponding program was developed based on the model and algorithm. Finally, using a long curved ramp bridge in an interchange sys-tem as an example, the validity of the selecting and synthesizing method was verified. The results showed that the new earthquake wave synthesized according with the multiple factors such as ampli-tude-frequency characteristics and the current criterion response spectrum and phase-frequency char-acteristics from natural earthquake record not only has the frequency-domain non-stationary charac-teristics of natural seismic records, but also complies with the criterion response spectrum of current highway bridge seismic design specifications. This method should be recommended for use.