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第三讲介绍了新旧钢筋混凝土结构设计规范在采用符号上的不同,本讲则要介绍在计量单位上的差别。新规范采用的计量单位也是遵照《建筑结构设计通用符号、计量单位和基本术语》(GBJ 83—85)的规定。一个物理量可用一个数值和一个计量单位的相乘积来表示。例如钢筋直径d=8mm,这个8就是一个数值,m m是一个计量单位,两个的乘积就代表钢筋的直径大小。因此,计量单位是一个数值为1的物理量,简称为“单位”。我国采用的法定计量单位是以国际单位制(简称SⅠ)单位为基础制定的。它包括:国际单位制的基本单位、国际单位制的辅助单位、国际单位制中具有专门名称的导出单位、国家选定的非国际单位制单位、由以上几种单位构成的组合形式的单位、由词头和以上几种单位所构成的十进倍数和分数单
The third lecture introduced the difference between the design specifications of old and new reinforced concrete structures. The differences in the unit of measurement should be introduced in this lecture. The unit of measurement adopted by the new standard is also in compliance with the provisions of the “General Symbols, Units of Measurement, and Basic Terminology for Architectural Structural Design” (GBJ 83-85). A physical quantity can be represented by the product of a value and a unit of measure. For example, if the diameter of the bar is d=8mm, this 8 is a numerical value and mm is a unit of measurement. The product of the two represents the diameter of the steel bar. Therefore, the unit of measure is a physical quantity with a value of 1 and is simply called “unit”. The legal measurement unit adopted in China is based on the International System of Units (SI) unit. It includes: basic units of the International System of Units, auxiliary units of the International System of Units, export units with special names in the International System of Units, non-SI units selected by the State, and units of a combination of the above types of units. Decimal multiples and score sheets made up of prefixes and above units