This thesis will accumulate more experiments for design and dynamic load test for cable - replacement works 本文为今后斜拉桥换索工程设计与检测工作进一步积累了经验。
In this paper , through calculation , analysis , static and dynamic load tests made for these three practical bridges , the mechanical properties of the type of the bridges have been studied 通过3座实桥的计算分析与静、动载试验,对钢管混凝土拱桥的力学特性做了研究。
In order to ascertain the character of cable - replaced bridge , in addition , the thesis calculates mode shapes and natural frequencies of the bridge using algor software and estimates the result of dynamic load test and calculation in details 为了评价换索后桥梁的工作特性,最后利用algor软件对换索后的结构进行了振型和自振频率分析,并对动载试验检测和计算成果作了详尽的分析和评价。
The load capacity and damage degree of bridge are detected by the curve of the transformation of vibration frequency in different attached load and different damage . a conclusion that the attached load method improves the of vibration frequency sensitivity to the physical property parameters of bridge structure is drawn at last . and the same time the paper bring forward a new and convenient technique of dynamic load test - - the attached load method 通过振动频率在不同的附加荷载作用下、不同破损情况下的变化曲线来确定桥梁的承载能力以及破损程度,得出了附加荷载法改变了振动频率对桥梁结构物理参数的弱灵敏性这一结论,提出了一种更为新颖、快捷的桥梁承载能力的动荷载检测方法? ?附加荷载法。
Currently , the method of bridge structure disease examination and structure damage evaluation mainly bases on apparent examination and static - state or dynamic load test , in this paper , based on the previous study result , the systemic research on a new method of beam system bridge structure damage identification and evaluation is being carried out , which is realized base on the segment flexural rigidity of reinforced concrete beam which is gained by using the theory of system identification and the result of static - state load test 当前桥梁结构病害检测与评价有基于表观病害检测、静动载试验成果等很多的方法体系。本论文在已有研究成果的基础上,对基于混凝土梁桥静载试验数据,运用系统识别原理,通过识别钢筋混凝土梁分段的抗弯刚度,进而实现梁桥结构损伤识别与其结构性能评价的方法体系进行了较为系统的研究,并对具体的工程实例梁进行了结构损伤识别与性能评价,得到了一些有益的结论。