Computer modeling and design provisions of shear wall building

Abstract

In recent years there has been a considerable increase in the number of tall building, both residential and commercial purpose and the modern trend is towards taller and more slender structures on a small piece of valuable land. In our country most of this tall building is attributing shear wall to resist the effect of lateral load like wind load, earthquake load, blast forces etc. As construction of tall building is relatively new phenomenon in Bangladesh, most of the practicing civil engineers have little knowledge about the analysis and design of shear wall building. During the analysis of a frame-wall structure, most of the cases the designer faces problem in modeling of shear and core wall. So the prime objective of this thesis is to carry out a comparative study among different modeling techniques of shear wall to suggest a simple guideline within reasonable accuracy of result. For this purpose various model has been prepared on an idealized problem and the results obtained from two-dimensional model is compared with those obtained from three-dimensional model. Analysis on two-dimensional model is performed by MICROFEAPand three-dimensional analysis is performed by SAP90 and STAAD-III. It is also studied that whether the results of the model vary significantly with the increase of height of the building. Moreover, effect on moment carrying capacity of shear wall due to change of its moment of inertia is checked. Like the modeling and analysis of shear wall the design engineer also face trouble in designing it, because the code provisions are not very much specific about shear wall. Also the code requirements for shear wall are dispersed in various chapters. Code provisions in Bangladesh National Building Code (BNBC), American Concrete Institute (ACI) code, Uniform Building Code (UBC) and British Code of Practice (BS 8110) are studied in this thesis and a straightforward guideline is suggested for the design of shear wall.