![]() ![]() Bending moments in beams and columns due to seismic excitation showed much larger values compared to that due to static loads. Advanced steel design explores the domain of research and understanding both analysis and design of steel structures in general and offshore compliant structures in particular. The values of shear forces due to L/C3 in beams B805, B806 and B807 were found to be about four times the values due to L/C1.The maximum values of compressive and tensile stresses in beams are approximately equal. The horizontal motion has a greater effect on the axial compression loads of the exterior columns compared to the interior columns andthe compressive stresses in ground floor columns were about 1.2 to 2 times the tensile stresses. The frame was analyzed using the response spectrum method to calculate the seismic displacements and stresses.The results obtained, clearly, showthat the nodal displacements caused drifts in excess of approximately 2 to 3 times the allowable drifts. Seismic analysis of a multi-story RC frame in Khartoum city was analyzed under moderate earthquake loads as an application of seismic hazard,and in accordance with the seismic provisions proposed for Sudanto investigate the performance of existing buildings if exposed to seismic loads.
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