等效截面查找
查找重量、几何尺寸、刚度或截面模量在所选容差范围内接近参考截面的截面。
并非设计替换。 结果仅在数值上相近。任何替换都必须由合格工程师复核强度、稳定性、正常使用、连接、防火和防腐要求。
方法与假定
Deviation (%) = (Candidate − Reference) / Reference × 100
Criteria: mass, overall geometry (depth & width), stiffness (Ix, Iy) or elastic section modulus (Zx, Zy)
Equivalence by one or two parameters does not establish design adequacy. Any substitution must be checked by a qualified engineer for strength, stability, serviceability, connections and fire/corrosion requirements.