Sổ tay kết cấu thép - Section 10

... singly-, dou-bly-, and point-symmetric sections is given by Eq. 10. 25. These provisions apply to I-, Z-,C-, and other singly-symmetric sections, but not to multiple-web decks, U- and box sections.Also, ... testing. 10. 1 0SECTION TENFIGURE 10. 3 Effective width concept. (a) Buckling of grid model; (b) buckling ofplate; (c) stress distributions.COLD-FORMED STEEL DESIGN10.1 110. 7 MAXIMUM WIDTH-TO-THICKNESS ... (b) below:(a) For singly-, doubly-, and point symmetric sections:MϭCrA͙␴␴for bending about the symmetry axis. (10. 29)ebo eyt 10. 1 8SECTION TENFor singly-symmetric sections, x-axis is the axis of...

Sổ tay kết cấu thép - Section 1

... grades of uncoated, hot-rolled, carbon-steel sheetsand strip intended for structural use.A606 covers high-strength, low-alloy, hot- and cold-rolled steel sheet and strip with en-hanced corrosion resistance. ... referred to as pressure-vessel-quality steels. Generally, a greater numberof mechanical-property tests and additional processing are required for pressure-vessel-quality steel.1. 8SECTION ONETABLE ... 35Fracture-critical members36F 4 Mech. / Weld.a25 70 40 105 0F,† 50WF† 2 Mech. / Weld.a25 70 40 102 to 4 Mechanicala25 70 40 102 to 4 Weldedb30 70 40 107 0WF‡ 21⁄2Mech. / Weld.b30 50 20 102 1⁄2to...

Sổ tay kết cấu thép - Section 2

... designed as bearing-type, fully-tightened, loose-to-slip or slip-critical connections (see Art. 5.3). Bearing-type connections have a higher allowable load ordesign strength. Slip-critical connections ... and shipping.2 .10 BUILT-UP SECTIONSThese are members made up by a fabricator from two or more standard sections. Examplesof common built-up sections are shown in Fig. 2.2. Built-up members are ... together for ﬁt-upand ﬁnal welding. The web-to-ﬂange welds, usually ﬁllet welds, are positioned for weldingwith maximum efﬁciency. For relatively small welds, such as1⁄4-or5⁄16-in ﬁllets, a girdermay...

Sổ tay kết cấu thép - Section 3

... of a structure.3.8 STRESS-STRAIN DIAGRAMSSuppose that a homogeneous steel bar with a constant cross-sectional area A is subjected totension under axial load P (Fig. 3.10a). A gage length L is ... forces doesnot apply.)A free-body diagram of a portion of the truss to the left of section AA is shown in Fig.3.7b). The internal forces in the truss members cut by the section must balance the ... Beer and E. R. Johnston, Vector Mechanics for Engineers—Statics and Dynamics,McGraw-Hill, Inc., New York.)3.1 0SECTION THREESTRUCTURAL MECHANICS—DYNAMICSDynamics is that branch of mechanics which...

Sổ tay kết cấu thép - Section 4

... any section due to loads on the archyϭvertical ordinate of section measured from immovable hinge4. 4SECTION FOURIϭmoment of inertia of arch cross sectionAϭcross-sectional area of arch at the sectionEϭmodulus ... determined, the stresses at any section of the arch can be foundby application of the equilibrium laws (Art. 4.4).Circular Two-Hinged Arch Example. A circular two-hinged arch of 175-ft radius with arise ... used to take the thrust, the right-hand side of the equation is not zero butthe elongation of the rod HL/AsE, where L is the length of the rod and Asits cross-sectionalarea. The effect of an increase...

Sổ tay kết cấu thép - Section 5

... E7016-X,E7018-XAWS A5.17 or A5.23§F7XX-EXXXF7XX-EXX-XXAWS A5.18ER70S-XAWS A5.20or A5.29§E7XT-X(ExceptϪ2,Ϫ3, 10, Ϫ13,Ϫ14,ϪGS)E7XTX-XA572 grades 60 and 65 AWS A5.5§E8016-X, E8015-XE8018-XAWS A5.23§F8XX-EXX-XXAWS ... 50E70XXE70XX-XF7XX-EXXX orF7XX-EXX-XXAWS A5.18ER70S-XE7XT-X(ExceptϪ2,Ϫ3, 10, Ϫ13,Ϫ14,ϪGS)E7XTX-XXA572 grade 42 and 50, andA588‡ (4 in. and under)AWS A5.1 or A5.5§E7015, E7016,E7018, E7028E7015-X, E7016-X,E7018-XAWS ... stress, 1-in fasteners maybe used in 31⁄2-in legs,7⁄8-in fasteners in 3-in legs, and3⁄4-in fasteners in 21⁄2-in legs. Inaddition, in highway bridges,5⁄8-in fasteners may be used in 2-in legs.5.8...

Sổ tay kết cấu thép - Section 6

... ﬁnishesAsphalt block (2-in),1⁄2-in mortar 30Cement ﬁnish (1-in) on stone-concrete 32ﬁllCeramic or quarry tile (3⁄4-in) on1⁄2-in 16mortar bedCeramic or quarry tile (3⁄4-in) on 1-in 23mortar bedFrame ... 19Terrazzo (1-in) on stone-concrete ﬁll 32Terrazzo (1-in), 2-in stone concrete 32Wood block (3-in) on mastic, no ﬁll 10Wood block (3-in) on1⁄2-in mortar base 16Floors, wood-joist (no plaster) double ... (per1⁄8-in thickness) 0.4Rigid insulation,1⁄2-in 0.75Skylight, metal frame,3⁄8-in wire glass 8Slate,3⁄16-in 7Slate,1⁄4-in 10Concrete ﬁll ﬁnish (per inch thicknes) 12Hardwood ﬂooring,7⁄8-in 4Linoleum...

Sổ tay kết cấu thép - Section 7

... 2(184.6)ϭ1,591 kip-inϭ132.6 kip-ftϽ277.5 kip-ftThe W21ϫ50 does not have adequate capacity. Therefore, trials to ﬁnd the lowest-weightlarger size must be continued. This trial-and-error process can ... the W12ϫ87 of grade 50 steel is the most economical wide-ﬂange section. 7.6.2 ASD for W Section with Axial CompressionThe dead- plus live-load axial compression totals 420ϩ120ϭ540 kips (Art. 7.6.1).Column ... is␾Pϭ0.85ϫ11.7ϫ11.19ϭ111.3 kips 107 .5 kips—OKn7.1 0SECTION SEVEN7.8 STEEL BEAMSAccording to the AISC ‘‘LRFD Speciﬁcation for Structural Steel Buildings,’’ the nominalcapacity Mp(in-kips) of a steel section in ﬂexure...

Sổ tay kết cấu thép - Section 8

... expensive normal-weight concrete may beused instead of lightweight concrete. Therefore, the two options that are frequently consid-ered for a 2-hour-rated, noncellular ﬂoor-deck system are 31⁄4-in lightweight ... Two-hour ﬁre-rated ﬂoor systems, with cold-formed steel deck. (a) With lightweightconcrete ﬁll; (b) with normal-weight concrete ﬁll.the metal deck without spray-on ﬁre protection and 21⁄2-in ... DECKThe most common types of ﬂoor-deck systems currently used with structural steel construc-tion are concrete ﬁll on metal deck, precast-concrete planks, and cast-in-place concrete slabs.8.1 CONCRETE...

Sổ tay kết cấu thép - Section 9

... static-force method is a single-mode design method, even though long-period structures are inﬂuenced by higher-moderesponse, and Ftsimulates the effect of higher-mode response on the earthquake-load ... of the mass matrix. The multidegree-of-freedom equations are coupled.They can be solved simultaneously by a number of methods. However, the single-degree-of-freedom response spectrum method is ... As a result, dynamic instability is not in-cluded in the simpliﬁed methods included in this section. The fastest-mile wind speed is smaller than the short-duration wind speed due to gusting.Corrections...

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