© 2021 JETIR June 2021, Volume 8, Issue 6 www.jetir.org (ISSN-2349-5162) JETIR2106510 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org d740 Analysis of Conventional Chevron Braced Frame and Diagrid Frame With Plan Irregularity 1 Prof. Amey R. Khedikar, 2 Neha S. Wanjari 1 Assistant professor and Head of Dept. of Civil engineering, Tulsiramji Gaikwad-Patil College of Engineering and Technology, Nagpur, Maharashtra, India 2 Research Scholar, Dept. of Civil engineering, Tulsiramji Gaikwad-Patil College of Engineering and Technology, Nagpur, Maharashtra, India. Abstract : High-rise buildings are more vulnerable to collapse due to high wind and earthquake pressure. In such a building risk of failure can be minimized by adopting lateral load resisting system. In this study, we compared three lateral load resisting frame i.e. diagrid frame and chevron braced frame with conventional frame system. The seismic analysis is done on these three frames. The structures are analyzed by linear static method. The building is considered to be irregular in plan. For irregular plan, C-shape plan, T-shape plan considered. The results are obtained after analysis are compared by various parameters like storey drift, absolute displacement, base shear, moment and axial forces. The First Comparison is between diagrid system, chevron braced system and conventional frame system for C-Type and T-Plan separately and after that second overall comparison is between C-Plan and T- plan. The analysis is done on by using STAAD Software. The result of work showed that diagrid system resist lateral more efficiently than chevron braced system and conventional frame system as it yields the least value for absolute displacement, storey drift, top storey shear and base shear. Keywords - Diagrid frame system, Chevron braced frame system, plan Irregularity. I. INTRODUCTION In the today’s generation, the rate of Population is increased day by day. Due to this space required for land is insufficient. So, civil engineer construct a building in sufficient space with maximum height with regular and irregular plan. In old days, this high-rise buildings only use for a commercial purpose. But, Now-a-days, it is used for both commercial and residential purpose due to lack of space. So, for safety, strength and aesthetical point of view structural engineer and architect construct a high-rise building with some shear wall, wall frame, rigid frame, braced tube system. Recently, For increasing the stability of structure diagrid frame, braced frame with diagonal grid is usually used. Diagrid frame is a particular form of space truss system. Dia-Frame consists of perimeter grid made up of a series of triangulated truss system. It is formed by intersecting the diagonal and horizontal components of structure of the building. Diagrid frame has better appearance in view and it is easily recognized. Diagrid frame structure has triangular configuration and high efficiency because of this the number of structure elements required for construct a building is reduces. Because of reduction in outer structural elements therefore it create less obstruction to outside view. Diagrid allow significant flexibility with the floor plan because the structural efficiency of diagrid system helps in avoiding interior and corner columns. The diagonal members of diagrid frame system carry dead load, live load, gravity load as well as lateral forces effectively in any seismic zone area due to their triangulated configuration. Diagrid frame structures are more effective in minimizing shear deformation in the building. The main difference between lateral load resisting diagrid structure model and conventional frame structure is that in diagrid structures almost all exterior conventional vertical columns are eliminated. Because of exterior frame consist of diagonal members which can carry gravity loads as well as lateral loads in diagrid structure because of their triangulated configuration, whereas conventional structure can carry only lateral loads. Diagrid structures are more effective in case of minimizing shear deformation than a conventional structure or other type of structure. One of the drawback of diagrid structure is that conventional structure has maximum ductility than it. Chevron braced frame are common configuration for providing lateral load resistance in steel framed building frame or concrete building frame. Chevron bracing is of inverted V-type of Shape. It involves two members meet at the middle point on the upper horizontal member of building. In Chevron structure members are designed for both tension and compression loads. chevron bracing allows the maximum space for doorways or corridors through the bracing opening. Objectives of this study- 1) To determine the best and the appropriate structural system for the different type of high-rise buildings and to understand chevron braced frame and diagrid frame action in high rise building. 2) To analyze diagrid, chevron braced and conventional frame structural systems using STAAD software for irregular plan. 3) To compare the performance of the building with diagrid structural system and chevron braced conventional frame system under seismic loading. 4) To obtain the response in terms of parameter such as storey displacement, storey drift, storey shear. II. ANALYSIS OF DIAGRID STRUCTURE SYSTEM AND CHEVRON BRACED SYSTEM In this study six models are considered with C-Type plan and T-type plan layout. For C-Type layout, Model is divide into three part and for T-type, model is also divide into 3 part, in their there are total 6 models named as C-1,C-2,C-3,T-1,T-2,T-3.The categorization of model is shown in below. The models are analyzed by using STAAD Software. C-1: Diagrid Structure corresponding to an C-Base plan. C-2: Chevron Braced Conventional Structure corresponding to an C-Base plan. C-3: Conventional Structure corresponding to an C-Base plan. T-1: Diagrid Structure corresponding to an T-Base plan. T-2: Chevron Braced Conventional Structure corresponding to an T-Base plan.