ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Composite box girders with corrugated steel webs and trusses is a new type of advanced bridge structure proposed recently. This kind of structure consists of a top concrete slab, corrugated steel webs and two bottom concrete-filled steel tubes connected by trusses. The resistance to torsion and overturning of this kind of structure is larger than that of composite bridges with a single concrete-filled steel tube. This kind of structure is able to satisfy the requirement of rapid construction, environment protection and cost effectiveness. Two composite box girder bridges with corrugated steel webs and trusses have been or are being constructed in China. This paper presents the design of these two bridges in detail, which will provide valuable engineering experience for the further promotion of this kind of new bridge structure. Experimental research has been carried out to study the flexural behavior and the flexural capacity of this kind of new bridge structure. The test results show that when the test beam is at the elastic stage, the cross-section can be viewed as a plane section if only the strains of the concrete top slab and the bottom steel tubes are considered. The test beam shows good ductility throughout the whole loading process.
1. Introduction
The concrete box girder is one of the most commonly used structure forms for bridges because of its large flexural and torsional stiffnesses. However, with the increase of span length, the self-weight of a concrete box girder may increase rapidly, which restricts its use in long-span bridges [1]. One of the most promising ways to reduce the self-weight of bridges is to adopt steel–concrete composite structures. Nowadays, there are mainly three types of steel–concrete composite bridge structures: composite bridges with steel beams and top concrete slab, composite bridges with steel webs (or steel trusses) and top and bottom concrete slabs, and composite bridges with top concrete slab, steel trusses and bottom concrete-filled steel tube (Fig. 1(a)).
4. Summary and conclusion
In this paper, the composite box girder bridge with CSWs and trusses has been introduced. Two engineering examples, including a footbridge and a viaduct, have been demonstrated in detail. The flexural behavior of this kind of structure has been experimentally investigated. The following conclusions can be drawn for the current paper.
(1) The composite box girder with CSWs and trusses is a newly proposed bridge structure. With the use of corrugated steel webs and bottom trusses, the self-weight of the structure can be minimized. The consumed material and the cost for the bridge construction are reduced, and the bridge construction and maintenance can be simplified. The use of this kind of bridge may satisfy the requirement of rapid construction and cost saving, therefore it is worth being promoted around the world.
4. خلاصه و نتیجه گیری
در این مقاله، پل با تیرآهن جعبه کامپوزیتی همراه با CSWها و خرپاها معرفی شده است. دو نمونه مهندسی پل پیاده روی و پل راه آهن با جزئیات کامل ارائه شده است. رفتار خمشی این نوع سازه به صورت آزمایشی مورد بررسی قرار گرفته است. نتایج زیر را می توان برای این مقاله در نظر گرفت.
(1) پل با تیرآهن جعبه کامپوزیتی همراه با CSWها و خرپاها یک سازه پل تازه پیشنهاد شده است. وزن خود سازه را می توان با استفاده از تیغه های فولادی موج دار و خرپا های پایین، به حداقل رساند. مواد مصرفی و هزینه ساخت پل کاهش یافته و ساخت و نگهداری پل ها ساده تر می شود. استفاده از این نوع پل ممکن است نیاز به ساخت سریع و صرفه جویی در هزینه را برآورده کند، بنابراین ارزش آن در سراسر جهان بالا رفته است.