@phdthesis{oai:nagoya.repo.nii.ac.jp:00009640,
 author = {小塩, 達也 and Ojio, Tatsuya},
 month = {Mar},
 note = {Fatigue damages have been actualized in highway structures in Japan.  Truck load contributes to fatigue damage of bridges or pavements.  Thus, control or traffic load is essential to sustainable maintenance on highway structures.  Weigh-in Motion (WIM) are used for control and monitoring of the weight of trucks on highway.  However, the number of WIM in Japan is not sufficient to control overloaded trucks.  Bridge Weigh-in-Motion, which uses bridge members as a scale for truck load, is the alternative methods to WIM.  Traditional BWIM methods required influence line of the bridge member, sensor for detecting of axle arriving time.  Therefore, measurement and analysis procedure were more complicated than WIM. The objectives of this study are to establish new BWIM methods, to analyze the effect of truck load on fatigue damage of highway structures, and to show the availability of BWIM on maintenance of highway structures by case studies. Two BWIM methods, Influence area method and Reaction force method, were developed and tested on highway bridges.  Influence area method can calculate gross vehicle weight by influence area, which is calculated from the integration of response wave at bridge members.  Feasibility studies for the method were carried out on a Warren truss bridge and steel plate girder bridges.  The Reaction force method detects axle loads from difference of strain wave at the end vertical stiffeners of simple supported plate girder bridges.  These new methods have advantages of simple measurement, calibration and calculation. Truck load survey was carried out in steel plate girder bridges by BWIM.  Fatigue damages were calculated for the each truck using Rain-Flow Counting Method and Miner and Miner’s rule.  The factors of truck type and load condition in fatigue damages were investigated and discussed. Surveys of overloaded trucks, which could cause maximum stress on bridge girders, were carried out in two bridges.  The stresses at the lower flange of main girders and truck loads by Influence area method were measured simultaneously.  Truck cranes were observed when the maximum stress was recorded.  Traffic load monitoring and vibration monitoring were carried out simultaneously in a viaduct.  The single truck load conditions where only one truck existed on the viaduct were extracted from truck load records obtained by Reaction force method.  The acceleration responses of bridge and ground to the single truck load were discussed.  The effects of the truck type, load, and vehicle speed in vibration level and peak-acceleration value were described. A truck traffic survey on a national road was carried out by Reaction force method.  BWIM was used as an alternative method of traffic survey.  The results showed that many trucks used the national road as a by-pass route for expressway at night., 名古屋大学博士学位論文 学位の種類:博士(工学) (論文) 学位授与年月日:平成18年3月27日},
 school = {名古屋大学, Nagoya University},
 title = {新しいBridge Weigh-in-Motionの開発と道路構造物の維持管理支援に関する研究},
 year = {2006}
}