日本钢结构设计标准..docVIP

CHAPTER 1 GENERAL Scope of Application This Standard applies to the structural design of steel buildings. The Standard, however, need not apply to structural designs based on special research studies. Structural Safety Verification Tests Where a design in involves connection and other structural details not expressly prescribed in this Standard, the structural safe of such details shall be proved by tests or by other appropriate means. Enlargement of Section Sections of various structural elements shall be enlarged as required, with due consideration for practical limitation in precision of structural designs, inadequacy in constructional workmanship, and such adverse factors as rusting, corrosion and wear of steel materials. Nomenclature A Gross sectional area; nominal body area of a high-strength bolt; or sum of sectional areas of column components (mm2) AN Net section (mm2) Ad Sectional area of lacing element; or total sectional area of a pair of lacing elements in the case of double lacing (mm2) Af Cross-sectional area of compression flange; or cross-sectional area of either flange (mm2) Ap Sectional area of parts in contact (mm2) As Cross-sectional area of vertical or horizontal stiffeners (mm2) Aw Cross-sectional area of web plate (mm2) a Equivalent area loss due to rivet, bolt or high-strength bolt holes(mm2); or spacing of intermediate stiffeners (mm) a0 Net area loss due to rivet, bolt or high-strength bolt holes (mm2) b Width of compression element free at one edge and fixed at the other; width of rocker or roller; or longitudinal spacing or pitch of consecutive holes (mm) , but not larger than 2.3 Bending coefficient dependent upon moment gradient D Nominal outside diameter of steel pipe; or outside diameter of main steel pipe (mm) d Width of element stiffened along two edges; outside diameter of branch pipe; width of web plate; or diameter of pin (mm) d1 Minimum width of the portion of web plate divides by vertical or horizontal stiffener (m