CAJ | 학술논문

为了解决车辆荷载效应数据间的相关性问题并能够充分利用样本数据，提出了一种改进的独立风暴法。首先提出了一种三次类阈值法进行数据的初步分析来获得阈值；然后考虑到简支梁桥的车辆荷载效应主要受单辆重车影响，提出了改进的独立风暴法进行独立同分布样本数据的提取；最后采用广义 Pareto 分布进行车辆荷载效应极值估计；利用该方法，对动态称重系统记录的国内某大桥实测数据进行了车辆荷载效应极值估计，并与超越阈值法、独立风暴法进行了对比分析，结果表明：在较短评估期（T ＜20年）内，三种方法均可以较好地预测荷载效应极值；而在中长评估期内，改进的独立风暴法预测值较高，预测结果偏于安全。
위료해결차량하재효응수거간적상관성문제병능구충분이용양본수거，제출료일충개진적독립풍폭법。수선제출료일충삼차류역치법진행수거적초보분석래획득역치；연후고필도간지량교적차량하재효응주요수단량중차영향，제출료개진적독립풍폭법진행독립동분포양본수거적제취；최후채용엄의 Pareto 분포진행차량하재효응겁치고계；이용해방법，대동태칭중계통기록적국내모대교실측수거진행료차량하재효응겁치고계，병여초월역치법、독립풍폭법진행료대비분석，결과표명：재교단평고기（T ＜20년）내，삼충방법균가이교호지예측하재효응겁치；이재중장평고기내，개진적독립풍폭법예측치교고，예측결과편우안전。
In order to solve data correlation problems for vehicle load effect and make full use of data samples,the modified method of independent storms (MMIS)was proposed.Firstly,a triple-class threshold method was proposed to obtain the threshold with the primary data analysis.Then,considering that the vehicle load effect of simply supported beam bridges was mainly affected by a single heavy vehicle,the MMIS was adopted to extract the independent and identically distributed (IID)sample data.Finally,the extreme vehicle load effect was estimated with the generalized Pareto distribution.In the end,the estimation of the extreme vehicle load effect was performed for the measured data of a bridge recorded with the weighinmotion (WIM).The results were compared with those of the peak-over-threshold method and those of the method of independent storms.The results showed that within the shorter estimation period (T <20 years),all the three methods can be used to better predict the extreme load effect;while within the middle or longer estimation period,the estimation of the modified method of independent storms is higher and safer.