基于静载试验的预应力混凝土连续梁桥承载能力研究

Study on Bearing Capacity of Prestressed Concrete Continuous Girder Bridge Based on Static Load Test

检验桥梁的实际承载能力、结构变形及抗裂性能是否满足有关技术规范要求,通常需要对成桥进行静载荷载实验;而科学合理的静载试验方法是桥梁静载试验结果评定的保证。在简要阐述桥梁静载试验方法及静载试验存在问题的基础上,基于某五跨连续梁实际工程案例,从静载试验理论计算、测点布置、荷载布置、工况设计、承载能力评定等方面进行详细阐述并提出一些建议,为科学合理的桥梁静载试验方法提供有价值的参考。

Static load test is usually needed to check whether the actual bearing capacity, structural deformation and crack resistance of bridges meet the requirements of relevant technical specifications, and scientific and reasonable static load test method is the guarantee of static load test results evaluation of bridges. On the basis of expatiating on the method of bridge static load test and the problems existing in the static load test, this paper, based on a five-span continuous beam as a practical engineering case, expounds in detail the theoretical calculation of static load test, the arrangement of measuring points, the arrangement of loads, the design of working conditions and the evaluation of bearing capacity, and puts forward some constructions. It provides a valuable reference for the scientific and reasonable static load test method of bridges.