BS EN 1998-4-2006 欧洲法规8.抗震结构的设计.筒仓,贮水池和管道

标准号：BS EN 1998-4-2006
中文标准名称：欧洲法规8.抗震结构的设计.筒仓,贮水池和管道
英文标准名称：Eurocode 8. Design of structures for earthquake resistance - Silos, tanks and pipelines
标准类型：P15
发布日期：2006/9/29 12:00:00
实施日期：2006/9/29 12:00:00
中国标准分类号：P15
国际标准分类号：91.120.25
引用标准：EN 1990-2002;EN 1991-4-2006;EN 1992-1-1-2004;EN 1992-3-2006;EN 1993-1-1-2004
适用范围：(1) The scope of Eurocode 8 is defined in EN 1998-1: 2004, 1.1.1 and the scope of thisStandard is defined in this clause. Additional parts of Eurocode 8 are indicated in EN 1998-1:2004, 1.1.3.(2) This standard specifies principles and application rules for the seismic design of thestructural aspects of facilities composed of above-ground and buried pipeline systems and ofstorage tanks of different types and uses, as well as for independent items, such as forexample single water towers serving a specific purpose or groups of silos enclosing granularmaterials, etc.(3) This standard includes the additional criteria and rules required for the seismic designof these structures without restrictions on their size, structural types and other functionalcharacteristics. For some types of tanks and silos, it also provides detailed methods ofassessment and verification rules.(4) This standard may not be complete for those facilities associated with large risks to thepopulation or the environment, for which additional requirements are the responsibility of thecompetent authorities. This standard is also not complete for those construction works whichhave uncommon structural elements and which require special measures to be taken andspecial studies to be performed to ensure earthquake protection. In those two cases the presentstandard gives general principles but not detailed application rules.NOTE The National Annex may specify additional requirements for facilities associated with large risksto the population or the environment.(5) Although large diameter pipelines are within the scope of this standard, thecorresponding design criteria do not apply for apparently similar facilities, like tunnels andlarge underground cavities.(6) The nature of lifeline systems which often characterizes the facilities covered by thisstandard requires concepts, models and methods that may differ substantially from those incurrent use for more common structural types. Furthermore, the response and the stability ofsilos and tanks subjected to strong seismic actions may involve rather complex interactionphenomena between soil-structure and stored material (either fluid or granular), not easilyamenable to simplified design procedures. Equally challenging may prove to be the design ofa pipeline system through areas with poor and possibly unstable soils. For the reasons givenabove, the organization of this standard is to some extent different from that of other Parts ofEN 1998. This standard is, in general, restricted to basic principles and methodologicalapproaches.NOTE Detailed analysis procedures going beyond basic principles and methodological approaches aregiven in Annexes A and B for a number of typical situations.(7) In the formulation and implementation of the general requirements, a distinction hasbeen made between independent structures and redundant systems, via the choice ofimportance factors and/or through the definition of specific verification criteria.(8) If seismic protection of above-ground pipelines is provided through seismic isolationdevices between the pipeline and its supports (notably on piles), EN 1998-2:2005 applies, asrelevant. For the design of tanks, silos, or individual facilities or components of pipelinesystems with seismic isolation, the relevant provisions of EN 1998-1:2004 apply.