Sổ tay kết cấu thép - Section 7

... critical stress, from Eq. (7. 10), then is0. 877 Fϭ36ϭ11.19 ksiͩͪcr21.68From Eqs. (7. 6) and (7. 7), the design strength is␾Pϭ0.85ϫ11 .7 11.19ϭ111.3 kipsϾ1 07. 5 kips—OKn 7. 1 0SECTION SEVEN7.8 STEEL BEAMSAccording ... Eqs. (7. 6) and (7. 7), is␾Pϭ0.85ϫ5.58ϫ21. 17 100.4 kipsϾ93.6 kips—OKn DESIGN OF BUILDING MEMBERS7 .77 .6 COMPARATIVE DESIGNS OF WIDE-FLANGE SECTION WITHAXIAL COMPRESSIONA...

Ngày tải lên: 18/10/2012, 16:13

... %*A 570 Hot-rolled30 30 49 2133 33 52 1836 36 53 174 0 40 55 1545 45 60 1350 50 65 1155 55 70 9A606 Hot-rolled, cut length 50 70 22Hot-rolled, coils 45 65 22Cold-rolled 45 65 22A6 07 Hot- or cold-rolled45 ... 50, class 2 50 70 12HSLAS 50 50 60 20–22HSLAS 50 60 70 16–18HSLAS 50 70 80 12–14HSLAS 50 80 90 10–12A715 Hot- and cold-rolled50 50 60 2260 60 70 1 870 70 80 1680 80 90 14A792 Alu...

Ngày tải lên: 18/10/2012, 16:13

... 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 ... 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 s...

Ngày tải lên: 18/10/2012, 16:13

... a two-dimensional space, these conditions can be written: GENERAL STRUCTURAL THEORY3.7FIGURE 3 .7 Forces acting on a truss. (a) Reactions RLand RRmaintain equilibrium of the trussunder 20-kip ... 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...

Ngày tải lên: 18/10/2012, 16:13

... any section due to loads on the archyϭvertical ordinate of section measured from immovable hinge 4. 4SECTION FOURIϭmoment of inertia of arch cross sectionAϭcross-sectional area of arch at the sectionEϭmodulus ... cos2␣0.04 87 12,665 829.0 0.24 1.000.1462 9,634 73 6.2 0 .72 0.980.2436 6,469 568.0 1. 17 0.940.3411 3,591 358.0 1.58 0.890.4385 1,381 154.8 1.92 0.820.5360 15919.9 2.20 0 .7...

Ngày tải lên: 18/10/2012, 16:13

... 50E70XXE70XX-XF7XX-EXXX orF7XX-EXX-XXAWS A5.18ER70S-XE7XT-X(ExceptϪ2,Ϫ3,Ϫ10,Ϫ13,Ϫ14,ϪGS)E7XTX-XXA 572 grade 42 and 50, andA588‡ (4 in. and under)AWS A5.1 or A5.5§E7015, E7016,E7018, E7028E7015-X, ... E7028E7015-X, E7016-X,E7018-XAWS A5. 17 or A5.23§F7XX-EXXXF7XX-EXX-XXAWS A5.18ER70S-XAWS A5.20or A5.29§E7XT-X(ExceptϪ2,Ϫ3,Ϫ10,Ϫ13,Ϫ14,ϪGS)E7XTX-XA 572 grades 60 and 65 AWS A5.5§E8016-X, E8015-XE...

Ngày tải lên: 18/10/2012, 16:13

... weight units(135 pcf): 470 222943241655 273 13334 374 2 573 533363841 476 46496385235404345495 677 455053555966 878 678 61050424953566 170 985461656 873 82110108410811515512484958636 672 841196 372 778 0869813312102131*Weights ... 150 160 170 10ϩ5Ϫ22ϩ6Ϫ24 7 30ϩ9Ϫ36ϩ11Ϫ43ϩ12Ϫ51ϩ14Ϫ59ϩ16Ϫ68ϩ19 77 ϩ21Ϫ87Roof 2 20ϩ5Ϫ19ϩ6Ϫ22 7 27 8Ϫ33ϩ10Ϫ39ϩ12Ϫ46ϩ13Ϫ53ϩ15Ϫ61ϩ18Ϫ69ϩ20 78 100ϩ4Ϫ14ϩ5Ϫ16ϩ6Ϫ19 7 24ϩ8Ϫ2...

Ngày tải lên: 18/10/2012, 16:13

... 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 ... SYSTEMS8.7FIGURE 8.6 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-...

Ngày tải lên: 18/10/2012, 16:13

... T is greater than 0 .7 sec.Fϭ0. 07 VT (9.8)tFtprovides a constant shear over the height of structure. The static-force method is a single-mode design method, even though long-period structures are ... 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...

Ngày tải lên: 18/10/2012, 16:13

... 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, ... cold-forming. Either full section tension tests, full section stub column tests, or an analyticalmethod can be employed. Important parameters include the tensile-strength-to-yield-stres...

Ngày tải lên: 18/10/2012, 16:13