tailieunhanh - Basic Theory of Plates and Elastic Stability - Part 19

Tài liệu tham khảo giáo trình cơ học kết cấu trong ngành xây dựng bằng Tiếng Anh - Yamaguchi, E. “Basic Theory of Plates and Elastic Stability” Structural Engineering Handbook Ed. Chen Wai-Fah Boca Raton: CRC Press LLC, 1999 - Plate and Box Girders | Elgaaly M. Plate and Box Girders Structural Engineering Handbook Ed. Chen Wai-Fah Boca Raton CRC Press LLC 1999 Plate and Box Girders Mohamed Elgaaly Department of Civil Architectural Engineering Drexel University Philadelphia PA Introduction Stability of the Compression Flange Vertical Buckling Lateral Buckling Torsional Buckling Compression Flange of a Box Girder Web Buckling Due to In-Plane Bending Nominal Moment Strength Web Longitudinal Stiffeners for Bending Design Ultimate Shear Capacity of the Web Web Stiffeners for Shear Design Flexure-Shear Interaction Steel Plate Shear Walls Compressive Edge Loading Edge Loading Stiffeners Openings with Corrugated Webs Terms References Introduction Plate and box girders are used mostly in bridges and industrial buildings where large loads and or long spans are frequently encountered. The high torsional strength of box girders makes them ideal for girders curved in plan. Recently thin steel plate shear walls have been effectively used in buildings. Such walls behave as vertical plate girders with the building columns as flanges and the floor beams as intermediate stiffeners. Although traditionally simply supported plate and box girders are built up to 150 ft span several three-span continuous girder bridges have been built in the . with center spans exceeding 400 ft. In its simplest form a plate girder is made of two flange plates welded to a web plate to form an I section and a box girder has two flanges and two webs for a single-cell box and more than two webs in multi-cell box girders Figure . The designer has the freedom in proportioning the cross-section of the girder to achieve the most economical design and taking advantage of available high-strength steels. The larger dimensions of plate and box girders result in the use of slender webs and flanges making buckling problems .