公共合同 适用于公共工程的《通用条款手册》第61分册第5卷：桥隧工程的设计、计算和试验——桥梁和钢结构的设计和计算

第61分册 桥隧工程的设计、计算和试验

第5卷

桥梁和钢结构的设计和计算

序言

0.1 本卷的规范只适用于桥梁和钢结构，除非规范中另有规定（*）。

0.2 如果构件不在混凝土中，则同样适用于钢-混凝土混合结构（*）。

第1章 作用 – 作用组合以及计算外力

第1条 原则和定义

可以利用本卷的内容来验证结构的安全性和耐久性，这里采用的极限状态设计法（*）。

一个极限状态指的是，结构或是其构件在满足了一个规定的条件时，如果在一个作用的影响下发生了某些不利的改变，就不能满足设计规定的某一功能要求。我们需要区分承载能力极限状态和使用极限状态（**）。

结构受到了单独的作用影响，根据时间上的分布，我们可以将其分为永久作用、周期性作用、间歇性作用和偶然作用（***）。

一个作用的特征值指的是一个可接受的概率，当在规定的期限内达到或超过一个最不利的数值时，我们就称这个期限为参考期限。

在作用组合中，我们一方面要区分短期作用或是偶然作用，另一方面也要区分长期作用（****）。

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En ce qui concerne la terminologie générale, le lecteur se reportera à la Publication 50 de la CEI : Vocabulaire Electrotechnique International (VEI), qui est établie sous forme de chapitres séparés traitant chacun d'un sujet défini, l'Index général étant publié séparément. Des détails complets sur le VEI peuvent être obtenus sur demande.

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• la Publication 27 de la CEI : Symboles littéraux à utiliser en électrotechnique ;
• la Publication 617 de la CEI : Symboles graphiques pour schémas.

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The terms and definitions contained in the present publication have either been taken from the IEV or have been specifically approved for the purpose of this publication.

Graphical and letter symbols

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The symbols and signs contained in the present publication have either been taken from IEC Publications 27 or 617, or have been specifically approved for the purpose of this publication.

IEC publications prepared by the same Technical Committee

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SOMMAIRE

TABLE DES MATIÈRES

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", the secretariat of which is held by UNI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Another European Standard series covering tubes for pressure purposes is:

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

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ISO 657-1 : 1988 (E)

Table 1 — Dimensions and sectional properties of hot-rolled equal-leg angles (concluded)

NOTES

1. Member countries may choose, to be included in their national standards, the sizes which are required to meet their demand.
2. For the angles so chosen, only thicknesses which can be rolled in their mills to meet the demand of the users may be selected from the list of thicknesses corresponding to equal angles in table 1.
3. The sectional area has been calculated using the formula

   S = [l/2 A - l) + 0,214 6 (r_root² - 2r_toe²)] × 1/100

   where
   

   S is the sectional area, in square centimetres;
   

   l is the thickness, in millimetres;
   

   r_root is the root radius, in millimetres;
   

   r_toe is the toe radius, in millimetres;
   

   A is the leg length, in millimetres.

4. Mass is calculated on the basis of density of steel of 7,85 kg/dm³.

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