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Design of Tall Structures 302(B) Behavior of tall structures under static and dynamic loads, model analysis.>b INTRODUCTION The achievement of structural system for tall buildings is not an easy task. Where, as building height increases the importance of lateral loads action rises in an accelerating rate. There are two types of lateral loads, wind and seismic loads. Wind load presents the most critical lateral loading for modern tall buildings, which have lightweight skeletons that cause uncomfortable horizontal movements for occupants. Also, wind is not constant either with height or with time and is not uniform over the sides of a building. So, windy weather creates a variety of problems in tall buildings, causing concern for buildings owner and engineers alike. Where, excessive vibration due to this load is a major obstacle in design and construction of a modern tall building. It should be limited to prevent both structural and nonstructural damage. The five major structural systems used for the Tall Buildings are: 1. Rigid frame system 2.Rigid frame with shear wall 3. Shear wall with opening 4. Outrigger system Rigid frame system Consist of column and girders joined by moment resistant connections. The lateral stiffness of a rigid-frame bent depends on the bending stiffness of the columns, girders and connections in the plane of the bent Shear Wall Structure It is a vertical continuous stiffening element, that deform in bending mode.It is Used in reinforced concrete buildings and suited to residential buildings and hotels. International Journal of Engineering Research & Technology (IJERT) IJERT ISSN: 2278-0181 www.ijert.org Vol. 3 Issue 7, July - 2014 IJERTV3IS070984 (This work is licensed under a Creative Commons Attribution