|
Title |
Traffic Induced Dynamic Load Factors on Continuous Steel Girder Bridges Based on Field Testing
|
|
Keywords |
동하중계수 ; 충격계수 ; 교량 현장 재하 실험 Dynamic load factor ; Impact factor ; Diagnostic load testing |
|
Abstract |
The objective of the paper is to present the results of analytical and experimental studies dealing with dynamic load for continuous steel girder bridges due to normal truck traffic. Various bridge design codes specify dynamic load factor (defined as a fraction of static portion of live load) for short span structures at the level of about 0.3. However, there are not definite values specified for continuous brigdes. Therefore, it is an usual practice to use the code specified dynamic load factors for simple span bridges to continuous bridges without clear background. The field measurement results indicate that the actual dynamic load factors are less than 0.2 for a single truck, and less than 0.05 for two trucks side-by-side, regardless of positive and negative moment region.
|