根据极限状态法—BAEL91版1999年修订版确定的钢筋混凝土建筑物和构筑物的设计计算技术规定

附录A 钢筋的构造要求

A.6 附着力................................................51

A.6.1 钢筋的附着力................................................51

A.6.2 焊接钢筋网的锚固和维护................................................58

A.7 各种建设性措施................................................59

A.7.1 钢筋的保护................................................59

A.7.2 正确浇筑混凝土的可能性................................................59

A.7.3 浇筑混凝土的施工缝................................................61

A.7.4 断裂力................................................62

A.8 某些构件的特殊规定................................................63

A.8.1 受压构件................................................63

A.8.2 持续支撑底板................................................64

A.8.3 梁的钢筋................................................67

A.8.4 局部压力，加箍，铰接................................................67

A.8.5 实验验算................................................74

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2

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of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.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.

5

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.

   4