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E 选擇横向剛架的結構圖形——在选择横向剛架的結構圖形时,須注意下列几点: 1.鋼結構的采用必須有根据(节約鋼材的指示或比較方案)。 2.横向結構的輪廓尺寸,应遵守模数制,并符合結構統一化的要求。 3.根据“生产厂房結構統一化基本条例”的指示,鋼結構厂房的縱向軸线按下列規定划分: a) 边柱外缘与縱向軸綫間之距离为250或500公厘。 b) 中柱的上柱截面的几何中心与縱向軸綫重合。 4.屋架的形式: a) 在一般情况下应采用标准梯形屋架,桁架的外形和弯矩圖形接近,鋼材消耗少,施工亦簡單。 b) 当屋面坡度大时,宜采用三角形屋架(屋架与柱鉸接)如圖2,或上弦坡度陡的多角形屋架(屋架与
E. Selection of Structural Patterns for Transverse Rigid Frames—When selecting the structural pattern of transverse rigid frames, the following points must be noted: 1. The use of steel structures must be based on (indicative of steel savings instructions or comparison schemes). 2. The outline size of the transverse structure shall comply with the modulus system and shall conform to the requirements for structural unification. 3. According to the “Basic Regulations for the Uniformization of Production Plant Structures”, the longitudinal axes of steel plant buildings are divided according to the following provisions: a) The distance between the outer edge of the side columns and the longitudinal axis is 250 or 500 mm. b) The geometric center of the upper column section of the center column coincides with the longitudinal axis. 4. The form of the truss: a) In the general case, the standard trapezoidal truss shall be used, the shape and bending moment of the truss shall be close to each other, the consumption of steel shall be less, and the construction shall be simple. b) When the roof slope is large, a triangular roof truss (hinge and column hinged) should be used as shown in Fig. 2, or a steeply-supplied polygonal roof truss (head truss with