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girder systems. I-girder and box shaped members are covered. Bracing for other types of bridges, such as truss, arch or towers is not specifically addressed; however much of the information included in this volume may be applicable. Bracing systems serve a number of important roles in both straight and horizontally curved bridges.
8 gru 2020 · Bracing between girders is provided 10.5m from the piers to limit the buckling length of compression flanges. The deck slab consists of 125mm thick precast concrete deck panels spanning between the cross girders, with a 125mm thick cast-in-situ concrete topping.
curved I-girder and a curved box girder. Figure 1. A curved, pretensioned concrete box-girder bridge in Rotterdam, Neth-erlands, is a prime example of standard practice for bridges in the Netherlands for more than a decade. Courtesy of Spanbeton.
The composite behavior between the concrete slab and the steel girders is essential for the horizontal trusses to be able to form a semi-box girder with some of the benefits of a closed cross-section. In Tjernberg (2022) the effects from post installed shear connectors were theoretically investigated for the Yxlö Bridge.
Precast concrete elements such as girders, piles, deck panels, and pavement are being used with increasing frequency in California. This chapter focuses exclusively on precast pretensioned concrete I-shape girders, referred to herein as PC girders. PC box girders and PC voided slabs are discussed in Chapters 5.4 and 5.5, respectively.
Steel box girder systems, which consist of steel tub girders with a cast in-place concrete deck on top, are a popular alternative for straight and horizontally curved bridges due to their high torsional stiffness and aesthetic appearance.
temporary bracing for girder stability during construction is required. All girder segments are pre-tensioned to resist stresses resulting from handling, erection, and deck weight.
