Analysis of A Tall Building with Shear Wall of RCC and Steel Plate

Absrtract:Tall Structures are most influenced by lateral forces in seismic prone areas. The most significant basis to be considered in the design of the tall structures is to oppose lateral forces which can cause instability and sudden failure of the structure. In this manner it is necessitated that structure ought to have enough lateral stability to oppose lateral forces and to control the lateral displacement of the building. The shear wall is one of the most generally utilized lateral loads opposing System in elevated structures Shear wall has high in-plane stiffness and quality which can be utilized to all the while opposing enormous horizontal loads and support gravity loads. The incorporation of the Shear wall has turned out to be inescapable in multi-storeys working to oppose lateral forces. It is exceptionally important to decide the successful, effective and ideal location of the shear wall. In this paper, seismic analysis has been done on G+ 10 storeys building in Zone IV. The analysis has been done considering shear wall of RCC and steel plate. Parameters like axial load, displacement, Overturning moment, stiffness etc. are determined for different location of shear wall.


INTRODUCTION
The basic role of all kinds of structural systems utilized in a building type structures is to support gravity loads. The most widely recognized loads resulting from the impact of gravity are dead load, live load and snow load. Other than these vertical loads, buildings are likewise exposed to lateral loads brought about by the wind, impact load or seismic tremors. Following are the various structural systems: 1. Structural frame systems: the structural system comprises of frames. Floor slabs, beams, and columns are the essential components of the structural system. Such frames can carry gravity loads while giving satisfactory stiffness. 2. Structural wall systems: in this kind of structures, all the vertical members are made of structural walls, generally called shear walls. 3. Shear wall-frame systems (double systems): the system comprises of reinforced Concrete frames interacting with reinforced concrete shear walls. Shear wall is a structural part in a reinforced concrete framed structure to oppose lateral forces, for example, wind forces. Shear walls are commonly utilized in tall structures subject to the lateral breeze and seismic forces. In reinforced concrete framed structures the impact of wind forces increase as the height of the structure increases. To compare the results of analysis of the tall building with and without shear walls. 6. To draw suitable conclusion from the above analysis.

SCOPE OF STUDY
The accuracy and the ability of the proposed structure are tested by static lateral load analysis in shear wall-frame system. In order to check the validity of the proposed models are executed on taken into consideration structural systems, in which shear walls are modelled via wall factors of ETABS [2015]. This analysis of lateral load resisting members in a building will assist us to increase the stability of structure against displacement and to decreases bending moment in vertical members (column).   Quick draw beam>properties of beam section>select beam properties> draw the beam>Quick draw column>properties of column section>select column properties>draw the column>Quick draw slab>properties of slabs>select the slabs properties>draw the slab 7. Drawing the wall of the building.

STEPS FOR ANALYSIS AND DESIGN OF STRUCTURAL ELEMENTS
Quick Draw wall> properties of wall section>select wall properties> draw the wall 8. Designing the shear wall.
Wall of the building>assign>shell>pier label>choose>P1>apply>select wall of building>assign>shell>spandrel label>choose S1>select wall of building>assign>shell>wall auto mesh option>shell assignment wall auto mesh option>advanced modify/auto mesh rectangular>select wall of building>assigning the load 3. THREE-DIMENSIONAL MODELING FOR ANALYSIS The following eight models are taken for analysis purpose: Model 1: In this model, no shear wall has been provided at the concrete frame building. Model 2: In this model, the Concrete Shear wall has been provided at the corners of the buildings. Model 3: In this model, the Concrete shear wall has been provided at the corner of the R.C.C building in the tubular form throughout ten storeys. Model 4: In this model, the concrete shear wall has been provided at the middle (tubular form) and at the corners of the R.C.C building throughout ten storeys.

MAXIMUM STOREY DISPLACEMENT
The values of maximum storey displacement, as mentioned in IS 1893(part 1): 2002, for various models are given below.    The highest values of drift occurred at 3rd storey in model-7 and the lowest value at the 1st storey in model-3.

Storey Stiffness
The values of maximum storey stiffness obtained for various models, as per IS 1893(part 1): 2002, are given table 7 and shown graphically figure 6.