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- W593141521 abstract "Large cracks and ruptured tendons encountered in the coupling joint vicinity of post-tensioned, continuous concrete bridge structures in the Federal Republic of Germany have, in recent years, led to an intensified bridge inspection program and extensive investigations. The results of the inspection program and the investigations into the probable causes for the encountered cracks are summarized and discussed in this paper to provide a basic understanding of the complex behavior of these coupling joints. Low fatigue stress limits for tendon coupler assemblies and stress crack corrosion are shown to be the main reasons why cracks in the coupling joint vicinity are so detrimental to the structural integrity. To avoid these cracks in the seemingly insensitive vicinity of the point of inflection for sustained loads, special design considerations have to be made in determining possible moment variations at that point. The highly nonlinear behavior in the construction and coupling joint vicinity due to tendon anchorages, coupler forces, and temperature differences has to be understood and accounted for. Special detailing has to be provided for the increase in loss of prestress force in the coupler, which is shown to cause substantial concentrated forces. With the understanding of the complex coupling joint behavior, possible rehabilitation measures for damaged bridge structures are presented and important design considerations for new bridge structures are summarized." @default.
- W593141521 created "2016-06-24" @default.
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- W593141521 date "1985-01-01" @default.
- W593141521 modified "2023-09-27" @default.
- W593141521 title "COUPLING JOINTS OF PRESTRESSING TENDONS IN CONTINUOUS POST-TENSIONED CONCRETE BRIDGES" @default.
- W593141521 hasPublicationYear "1985" @default.
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