This thesis will accumulate more experiments for design and dynamic load test for cable - replacement works 本文為今后斜拉橋換索工程設計與檢測工作進一步積累了經驗。
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 通過3座實橋的計算分析與靜、動載試驗,對鋼管混凝土拱橋的力學特性做了研究。
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 為了評價換索后橋梁的工作特性,最后利用algor軟件對換索后的結構進行了振型和自振頻率分析,并對動載試驗檢測和計算成果作了詳盡的分析和評價。
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 通過振動頻率在不同的附加荷載作用下、不同破損情況下的變化曲線來確定橋梁的承載能力以及破損程度,得出了附加荷載法改變了振動頻率對橋梁結構物理參數的弱靈敏性這一結論,提出了一種更為新穎、快捷的橋梁承載能力的動荷載檢測方法? ?附加荷載法。
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 當前橋梁結構病害檢測與評價有基于表觀病害檢測、靜動載試驗成果等很多的方法體系。本論文在已有研究成果的基礎上,對基于混凝土梁橋靜載試驗數據,運用系統識別原理,通過識別鋼筋混凝土梁分段的抗彎剛度,進而實現梁橋結構損傷識別與其結構性能評價的方法體系進行了較為系統的研究,并對具體的工程實例梁進行了結構損傷識別與性能評價,得到了一些有益的結論。