Structural Steel Designers Handbook Part 13 pptx

... a strong competitor of iron and steel. After 1900, concrete became the principal competitor of steel for shorter-span arch bridges. Development of structural steels made it feasible to construct ... members. *Revised from Sec. 13, ‘‘Arch Bridges,’’ by George S. Richardson (deceased), Richardson, Gordon and Associates, Pittsburgh, in Structural Steel Designer’s Handbook, 1st ed., Mc...

Ngày tải lên: 10/08/2014, 12:21

Ngày tải lên: 10/08/2014, 12:21

... York) 3.49 GENERAL MATERIAL NONLINEAR EFFECTS Most structural steels can undergo large deformations before rupturing. For example, yielding in ASTM A36 steel begins at a strain of about 0.0012 in per ... ͚F yC ϭ 0, and ͚M zC ϭ 0: 4.8 SECTION FOUR M ϭ Vx ϩ Hy Ϫ M ϩ Pa cos ␪ ϩ Pb sin ␪ (4 .13) x For structural steel members, the shearing force on a section usually is assumed to be car...

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... HOLLOW STRUCTURAL SECTIONS Design criteria for round and rectangular hollow structural sections (HSS) used as structural members in buildings is given by AISC in ‘‘Specification for the Design of Steel ... the steel deck. The slab thickness above the steel deck must be at least 2 in. The AISC LRFD specification indicates that for ribs perpendicular to the steel beam, concrete belo...

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... reinforced with localized steel plates, pipes, or angles (Fig. 8.15). (‘ Steel and Composite Beams with Openings,’’ Steel Design Guide Series no. 2, Amer- ican Institute of Steel Construction.) Composite ... Thornton-Tomasetti Engineers, New York, New York Structural- steel framing provides designers with a wide selection of economical systems for floor and roof construction. Stee...

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... (b)in columns. (Source: Commentary on the Specification for the Design of Cold- Formed Steel Structural Members, American Iron and Steel Institute, Washington, DC, 1996, with permission.) Fig. 10.3c. As the ... on effective element. (Source: Specification for the Design of Cold-Formed Steel Structural Members, Amer- ican Iron and Steel Institute, Washington, DC, 1996, with permissio...

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... of specifications, designers should obtain advice from fabricators and contractors whenever possible. Also useful are steel- industry-developed rules-of-thumb intended to help designers. The following ... with two or more traffic lanes Concrete: On I-shaped steel beams S /7, S Յ 10† S /5.5, S Յ 14† On steel box girders W L ϭ 0.1 ϩ 1.7R ϩ 0.85 / N w ‡ Steel grid: Less than 4 in thick S...

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... 1,297(15) /(300 ϫ 66.03) L Total: ϭϪ26 ϭϪ12 ϭϪ18 Ϫ56 TABLE 12.41 Steel Stresses in G 1 , ksi Top of steel (compression) Bottom of steel (tension) DL:ƒ ϭ 1.767 ϫ 12 / 1,992 ϭ 11.03 b SLD:ƒ ϭ 838 ... higher than in plate-girder and rolled-beam bridges. For, with more than half the steel surface inside the box, less steel, especially corners, which are highly suscep- tible, is exposed t...

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... Specifications for Highway Bridges.’’ 13. 2 TRUSS COMPONENTS Principal parts of a highway truss bridge are indicated in Fig. 13. 1; those of a railroad truss are shown in Fig. 13. 2. BEAM AND GIRDER BRIDGES ... section to: Top of steel ϭ 30.75 Ϫ 7.25 ϭ 23.50 in Bottom of steel ϭ 31.50 ϩ 7.25 ϭ 38.75 in Top of concrete ϭ 23.50 ϩ 2ϩ 8.50 ϭ 34.00 in Section Modulus: Top of steel Bottom o...

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... Norway 139 4 425 1991 Quetzalapa Bridge Quetzalapa, Mexico 139 1 424 1993 Nan Pu Shanghai, China 138 8 423 1991 Vasco de Gaama Lisbon, Portugal 137 8 420 1998 Hitsuishijima 2 Kagawa, Japan 137 8 420 ... Saint Nazaire, France 132 5 404 1975 Elorn River Brest / Quimper, France 131 2 400 1994 Rande Vigo, Spain 131 3 400 1977 Wuhan Bridge over Yangtze Wuhan, Hubei Prov., China 131 2 400...

Ngày tải lên: 10/08/2014, 12:21