دانلود رایگان مقاله لاتین ظرفیت حمل بار تیر اهن از سایت الزویر
عنوان فارسی مقاله:
ظرفیت حمل بار تیر اهن با روزنه بازبینی در پل کامپوزیتی
عنوان انگلیسی مقاله:
Load-Carrying Capacity of End Cross-Girder with Inspection Holes in Composite Bridge
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Cross girders or cross frames at the girder end are essential structural elements for the bridge to resist earthquakes. The current Japanese specifications for highway bridges require that the end cross-girder be large and strong with its lower flange as close to the lower flange of the main girder as possible [1]. In Chile, bridges with no end crossgirders or no end cross-frames had been constructed, many of which were damaged badly by the earthquake in 2010 [2]. The incident has demonstrated the importance of the end cross-girder/end cross-frame for the earthquake resistance. The severe corrosion of the steel bridge has occurred mostly at the girder end [3]. This is attributed to water leakage through the expansion joint and the formation of congested space at the girder end. In short, corrosion environment is quite bad around the end cross-girder. The corrosion reduces the cross sectional area, which deteriorates the load-carrying capacity of the member [4–6]. Many steel bridges were replaced in Japan because safety was threatened by corrosion [7]. Thus the protection of a steel bridge from corrosion is a very important issue for bridge maintenance. The corrosion of the end cross-girder can reduce the safety margin of a bridge and can endanger a bridge during large earthquake. Nevertheless, the girder end is often exposed to corrosive environment. More careful inspection is therefore required for the girder end than for the other members. Quite frequently, however, the distance between the end cross-girder and the parapet is so small that visual inspection on the parapet side is practically impossible. This creates a situation where the corrosion is not noticed until it penetrates through the plate of the end cross-girder and holes are made. Photo 1 shows an example of such an end cross-girder. In this bridge, in addition to the partial loss of the cross section of the web, the severe reduction in the flange thickness on the parapet side had been caused, but it was recognized only after the repair work was started. Against the background of the information above, the end crossgirder with inspection holes in the web is proposed. The holes enable one to conduct visual inspection of the parapet side of the girder. In addition, the improvement of ventilation can be expected as well. However, the inspection holes would inevitably degrade the loadcarrying capacity of the end cross-girder. In the present study, the reduction in the capacity is evaluated and the reinforcement method to make it up is then investigated.
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کلمات کلیدی:
Load-Carrying Capacity of End Cross-Girder with Inspection Holes in ... https://www.sparrho.com/...cross-girder-with-inspection-holes-in-composite-bridge/b986... Load-Carrying Capacity of End Cross-Girder with Inspection Holes in Composite Bridge. Imported: 15 Jan '17 | Published: 23 Dec '16. Eiki Yamaguchi, Hiroyuki ... Bridge Maintenance Inspection and Evaluation, Second Edition https://books.google.com/books?isbn=0824786092 Kenneth White - 1992 - Technology & Engineering The significant inspection locations in steel beams and girders are essentially the ... Rivets or bolts require that holes be made through the beam members. The effective cross section is reduced and a stress concentration is created; the ... Composite beams, steel beams acting together with the reinforced concrete deck for ... The Manual of Bridge Engineering - Page 734 - Google Books Result https://books.google.com/books?isbn=0727727745 M. J. Ryall, G. A. R. Parke, J. E. Harding - 2000 - Bridges 13.2.7 Advanced composite construction bridge beams Bridge enclosures and fairings The need for regular inspection and maintenance of ... which is set below the steel girders and there it escapes through small drainage holes. ... maintenance costs to be greatly reduced, but also enables the shape of the cross-section to ... Structural Analysis of Historical Constructions - 2 Volume Set: ... https://books.google.com/books?isbn=0415363799 Claudio Modena, P.B. Lourenço, P. Roca - 2004 - Technology & Engineering (1996) tested two fatigue strengthened girders for 1 0 million cycles monitoring CFRP plates. From these inspections cover plates debonding was not found. ... The application of bonded composite patch to repair cracked metallic structures ... initial transverse cracks were used to simulate rivet holes of aging bridge girders. Advanced Polymer Composites and Polymers in the Civil Infrastructure https://books.google.com/books?isbn=0080526438 L.C. Hollaway - 2001 - Technology & Engineering Composite enclosures and aerodynamic fairings for bridges Bridge structures ... the girders of steel composite bridges to provide inspection and maintenance access. ... is erected below the steel girders, where it escapes through small holes. ... the shape of the cross-section to be optimized by extending the enclosure into a ... Searches related to Cross-Girder with Inspection Holes in Composite Bridge what is a composite bridge composite bridge design example composite girders for railway bridges composite bridge wikipedia aashto fatigue category ladder deck bridge composite bridge advantages bridge fatigue failure
