【摘要】：為改進(jìn)正交異性鋼橋面板焊縫性能的評(píng)估方法,使由分布式數(shù)據(jù)采集系統(tǒng)獲得的大量多樣化數(shù)據(jù)及非完整數(shù)據(jù)得到有效利用,同時(shí)提高目前模擬和數(shù)據(jù)可視化技術(shù),提出了通過(guò)采用多元回歸模型,設(shè)定每小時(shí)鋪裝層溫度和交通密度為自變量,得到與應(yīng)力相關(guān)的性能指標(biāo)的評(píng)估方法。為了驗(yàn)證該方法,采用大貝爾特橋的實(shí)測(cè)結(jié)果,以該橋的每小時(shí)路面平均溫度和重載車輛數(shù)量作為輸入?yún)?shù),輸出與應(yīng)力相關(guān)的性能指標(biāo)。在S~N方法下該性能指標(biāo)被認(rèn)為與疲勞損傷的保守預(yù)估值成一定的比例,可采用監(jiān)測(cè)結(jié)果的集合通過(guò)最小二乘法及多元線性回歸,對(duì)模型參數(shù)進(jìn)行歸納。驗(yàn)證結(jié)果表明預(yù)測(cè)值與實(shí)測(cè)值吻合較好。該方法提高了正交異性鋼橋面板的結(jié)構(gòu)健康監(jiān)測(cè)效率,并為現(xiàn)代監(jiān)測(cè)系統(tǒng)產(chǎn)生的多樣結(jié)果的集成和可視化提供了框架。該方法可以作為橋梁管理系統(tǒng)的一部分,也可用于評(píng)估結(jié)構(gòu)剩余使用壽命。
[Abstract]:In order to improve the evaluation method of weld seam performance of orthotropic steel bridge deck, a great deal of diversified data and non-complete data obtained by distributed data acquisition system are effectively utilized, and at the same time, the simulation and data visualization technology is improved at the same time. The evaluation method of stress-related performance index is proposed by using multiple regression model and setting the hourly pavement temperature and traffic density as independent variables. In order to verify this method, the measured results of Dabel Bridge are adopted. The average road temperature per hour and the number of heavy duty vehicles of the bridge are taken as input parameters, and the performance indexes related to stress are outputted. The performance index is considered to have a certain proportion to the conservative prediction value of fatigue damage. The parameters of the model can be summed up by the least square method and multiple linear regression using the set of monitoring results. The verification results show that the predicted values are in good agreement with the measured values. The method improves the structural health monitoring efficiency of orthotropic steel deck and provides a framework for the integration and visualization of various results produced by modern monitoring system. This method can be used as a part of the bridge management system and can be used to evaluate the residual service life of the structure.
【作者單位】： 中鐵大橋局股份有限公司;
【分類號(hào)】：U448.36;U443.3

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本文編號(hào)：2440018