CAJ | 학술논문

采用单自由度反应谱方法对满足一定条件的减隔震桥梁进行地震反应分析可以简化计算过程，但需要解决精度问题。针对规范反应谱阻尼修正方法对计算精度的影响进行了分析并提出了改进方法。为了验证改进方法的合理性，对一座常规减隔震桥梁分别采用不同计算方法进行了比较分析，结果表明采用改进的阻尼修正公式后，简化反应谱方法的计算精度得到很大提高，且结果偏于安全。
채용단자유도반응보방법대만족일정조건적감격진교량진행지진반응분석가이간화계산과정，단수요해결정도문제。침대규범반응보조니수정방법대계산정도적영향진행료분석병제출료개진방법。위료험증개진방법적합이성，대일좌상규감격진교량분별채용불동계산방법진행료비교분석，결과표명채용개진적조니수정공식후，간화반응보방법적계산정도득도흔대제고，차결과편우안전。
When using the single-degree-of-freedom ( SDOF) response spectrum method to analyze the seismic re-sponse of some isolated bridges, it can simplify the calculation process.However, it needs to improve the accuracy in engineering as well.In this paper, the effects of the modification method for response spectrum damping on com-putation accuracy are analyzed and improvements are proposed.Specially, the objective is to aim at the seismic de-sign code for highway bridges.In order to verify reasonability of the improved method, different methods are used to analyze earthquake responses of a regular bridge with isolation bearings.The results indicated that based on the im-proved damping modification formula, the calculation precision of the simplified SDOF response spectrum method is greatly increased and the computational results are safer.