英语翻译要求：不能用翻译软件,一定要读得通,意思基本正确.翻译得好肯定追加.Annex A details the pr

英语翻译
要求：不能用翻译软件,一定要读得通,意思基本正确.翻译得好肯定追加.
Annex A details the principles that are appropriate for the determination of for all reinforcements.A specific numerical value of for steel metallic reinforcements is given.For other metallic reinforcements and polymeric reinforcements specific values of ,can not be given as these materials are proprietary in nature.The total material factor is given by:
=
where
=
and
=
5.3.3.2 Partial material factors for metallic reinforcements
Recommendations covering the assessment of the partial material factors for metallic reinforcements are detailed in annex A.
The design tensile strength of metallic reinforcements should be:
=
Where
is the design strength of the reinforcement;
is the design strength of the reinforcement;
is the ultimate tensile strength of the reinforcement (its base strength);
5.3.3.3 Partial material factors for polymeric reinforcements
The following principles should be applied in assessing the design tensile strength of materials which exhibit long term creep behaviour.Polymeric reinforcements in particular may fall into this
category.
The design tensile strength in the reinforcing materials should be derived on the basis of the
following two principles.
a) During the life of the structure the reinforcement should not fail in tension.
b) At the end of the design life of the structure,strains in the reinforcement should not exceed a
Therefore,the reinforcement base strength should be taken as the lesser of either the peak tensile creep rupture strength at the appropriate temperature or the average tensile strength based on creep strain considerations at the appropriate temperature.
Thus,the design tensile strength of polymeric reinforcements should be:
where
is the design strength of the reinforcement;
is the partial material factor for the reinforcement.
The procedure for determining fm is contained in annex A.
5.3.4 Partial material factors for soils
Partial material factors are prescribed for soil parameters to account for uncertainty.The design values for soil parameters should either be assessed directly or should be derived from characteristic values,see 2.5,using the relationship:
where
is the soil parameter design value;
is the characteristic value of the soil parameter which is the worst credible value;
is the prescribed partial factor for the soil parameter.
Values of for the various soil parameters are listed in sections 6,7 and 8.