الفهرس 
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Abstract
Over the past 80 years, many approaches for analysis and design of steel framed structures were permitted by design codes. There is three main traditional design approaches for steel framed structures which are A.S.D, P.D and L.R.F.D. However, lately a fourth was developed known as advanced analysis and design method.
The presented work aims to survey trends in the analysis and design of steel framed structures with reference to AISC and ECP design codes, summaries the procedures of analysis and design of steel frames structures according to AISC and ECP design codes and provides comparison between the traditional methods (A.S.D, P.D and L.R.F.D) versus the advanced analysis and design method.
The traditional design approaches are based on first-order analysis applied by the practicing engineers, where the members and frame stability were discussed in terms of second-order effects by using amplification factors and the determination of the effective length method. Further on, individual member checks are required by using interaction equations provided by design codes. A new provision of anal’ysis of steel framed structures presented by AISC 2005 will be discussed in the presented work.
The new provision presented by AISC 2005 is considered to be a step ahead toward advanced analysis and design method as it predict more accurately the load effect on the structure in the analysis stage and eliminating the need for calculating the effective length factor. The application of the new provision using ST AAD program will be provided in the presented work and compared to the results obtained from applying the effective length factor.
Recently, the new trend in design codes is to allow the use of computer programs which can provide accurate prediction of the structure strength, where the design code will provide the characteristics of the methods of structural analysis and design used in such program. Such a code would have some of the present member strength formulas and it is expected to be removed in the shortcomings and allow them to be replaced by more accurate structure assessment computer program. The purpose of the practical advanced