CAJ | 학술논문

为了提取斜拉桥监测数据中的恒载索力，使用不同统计方法逐级剔除各类因素的影响。以南京长江三桥健康监测系统采集的索力传感器信息为依托，采用线性拟合剔除温度的影响；采用小波基函数为 DB8的5级小波降噪方法剔除噪声信号；采用极值Ⅲ型分布拟合检验，取拟合的位置参数作为恒载索力。结果表明：索力和温度呈线性关系，有时温度效应较显著；噪声影响量较小；2007年交通状况下，车辆荷载影响量是温度影响量的2倍。多根拉索的计算结果验证了所提方法的可靠性和正确性。
위료제취사랍교감측수거중적항재색력，사용불동통계방법축급척제각류인소적영향。이남경장강삼교건강감측계통채집적색력전감기신식위의탁，채용선성의합척제온도적영향；채용소파기함수위 DB8적5급소파강조방법척제조성신호；채용겁치Ⅲ형분포의합검험，취의합적위치삼수작위항재색력。결과표명：색력화온도정선성관계，유시온도효응교현저；조성영향량교소；2007년교통상황하，차량하재영향량시온도영향량적2배。다근랍색적계산결과험증료소제방법적가고성화정학성。
To extract the cable forces due to dead load in cable-stayed bridges from the monitoring data,the effects of various factors are eliminated step by step by different statistical methods.The information of cable tension sensors recorded by the health monitoring system of Nanjing No.3 Yangtze River Bridge is taken as an example. Temperature effects are eliminated by linear fitting analysis;a 5-level wavelet de-noising method is applied to eliminate the noise signal by the wavelet basis function of DB8.The rest cable force data is tested by the method of extreme-value type-Ⅲ distribution, and the fitted location parameter is selected as the cable force due to dead load.The results show that the cable force has a linear relationship with temperature. Sometimes, the temperature effect is significant.Noise effect accounts for a small percentage,and the vehicle loads effect has twice the temperature effect on the traffic volume in 2007. The calculation results of other stay cables verify the reliability and validity of the proposed method.