Overloading coefficients of cantilever span support
Journal Title: Roads and Bridges - Drogi i Mosty - Year 2010, Vol 9, Issue 2
Abstract
Safety analysis of cantilevered bridges can be applied to spans and supports. The paper concerns effects of overloading of temporary supports, usually used for erecting concrete cantilevered spans. Influence of selected factors is considered on the example of bridge, built in Kędzierzyn-Koźle. The length of the main span of this prestressed concrete box girder bridge is 140 m. Supports of the structure are loaded untypically, due to skewness of the bridge. Proposed span overloading coefficients are used for evaluation of structure safety in erection stage. In the paper design solutions of dead load asymmetry (arrangement of cable anchorages along the span length), influence of random factors (segment cross-section dimensions assumed as random variables) and segment concreting asymmetry are considered. Different coefficients of segment and cantilever overloading are distinguished. The first one usually have greater values, than calculated on their basis global value for the whole cantilever.
Authors and Affiliations
Czesław Machelski, Robert Toczkiewicz
Zastosowanie metody georadarowej do oceny rozwoju ruchów masowych na przykładzie osuwiska w Kałkowie
Osuwanie jest rodzajem ruchów masowych, które może stanowić poważne zagrożenie szlaków komunikacyjnych. W 2010 roku i później wystąpiło w Polsce wiele zsuwów oraz doszło do licznych uszkodzeń dróg i budynków. W związku z...
Zmiany promienia krzywizny powłoki mostowego obiektu gruntowo-powłokowego podczas budowy
Artykuł dotyczy mostowych obiektów gruntowo-powłokowych o kolistym kształcie górnej części przekroju poprzecznego powłok, wykonanych ze stalowej blachy falistej. Podczas układania zasypki gruntowej powłoka ulega wypiętrz...
Evaluation of technical condition of concrete covers of cable manhole used in roads
The subject of the paper is the technical condition of precast concrete covers of cable manhole used on roads for pedestrians and vehicles. The purpose of performed investigation was the evaluation of the technical condi...
Impact of reinforcement layer material and thickness on deflections measured in the static and dynamic plate load tests
The bearing capacity and compaction values obtained in the plate load tests (the latter determined indirectly) often depend on the used test method: static - using static load test apparatus (VSS) or dynamic - using ligh...
Steel plate curvatures of soil-steel structures during construction and exploitation
The paper analyses the deformation of cir- cumferential bands of shells made of corrugated metal sheets in soil-steel structures. A change of curvature in the crown of a shell is assumed as a measure of deformation. In t...