SEISMIC RESPONSE OF MULTI-STOREY SHEAR WALL FRAMED STRUCTURE WITH SOFT STORY

Abstract

A high-rise building whose first floor is composed of open spaces is called a soft floor building. Such floors have a substantial impact on a building's seismic performance. this is awing to the floors abrupt lateral stiffness and strength fluctuations. A large earthquake can cause enormous damage or collapse of a building. Previous studies have shown that structure damage from earthquakes is the cause of large displacements. If the structure, is intended for horizontal loads, the structure will show greater deflection. Braces and shear walls are the most common lateral load-bearing systems for reducing displacement. Shear walls and braces are used for improving lateral stiffness, ductility, minimal lateral displacement, and safety. Story drift and lateral displacement are essential considerations in seismic design of structures. shear wall was added inside the proposed structure to counter the lateral load induced by earthquake and to improve structure's stiffness. Therefore, by making use of shear walls in the building, it is possible to prevent large displacements and thus damage due to displacements. In addition, Bracing is also mainly used foe structures exposed to wind and seismic loads. It resists the forces of the bracing element in both compression and tension. As a result, the brace system withstands horizontal loads very efficiently. The brace frame makes the system more efficient and stiffens the structure laterally. By adding material to the bare frame, it forms an efficient structure for higher heights. In this thesis work, the seismic response of soft-floor RCC building is studied using seismic analysis method. the parameters considered in this study include soft floor heights, shear wall position, bracing types and arrangements along the height of the building. Furthermore, the effectiveness of using simple strengthening procedures to increase structural safety will be investigated without causing large changes tot he building's architectural and functional needs will be studied