欧洲规范 8：抗震结构计算—第 3 部分：建筑物的计算和加固—法国/欧洲标准的国家附件

欧洲规范 8—抗震结构的计算 第 3 部分：建筑物的计算和加固

重砖石工程、模板浇注的大型混凝土墙等）。

相反，（这种情况）在钢筋混凝土或混合构造物的骨架情况下，并不常见。

通常，在这种情况下的解决方案是，在内部或外部增加新的支撑结构，旧的结构，只在下面的情况下才承受荷载，即可能需要添加一些结构，以便将这些荷载传递和接转到新的支撑上的情况（在每一个层面上或在建筑物基础上的增加纵梁）。

在后一种情况下，也可以直接采用第 EN 1998-1 号欧洲标准及其附件规定的措施，但有关如下第（7）节所指出的那样规定的受地震影响的层面除外。

(7) 对现有建筑物加固的决定和保护等级，可以：

—根据在特殊工地上，与建筑类型或占地类型有关的规章制度要求而作出；

—根据公共或私营业主的个人要求，或可能根据一项特定工程的建议而作出（如果有这种情况，可以提出比上述规章制度更高的要求）。

注释 值得注意的是，尤其是在第二种情况下，对现有状况插入一个适当的调查阶段是很有益的，以便在加强安全、技术可行性和财务影响中确定更好的折中方案。

需要增加调查阶段的特定工程，是为了对技术解决方案和恢复防护等级的讨论提出建议，以便更好地引导业主在自己的责任范围内作出最终的选择。

(8) 《为国家层面确定的参数》被加上了边框，以便更加明了。附件的其他内容为欧洲标准在法国领土上实施，提供了不矛盾的补充。

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of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.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