International Journal For Technological Research In Engineering Volume 5, Issue 11, July-2018 ISSN (Online): 2347 - 4718 www.ijtre.com Copyright 2018.All rights reserved. 4552 COMPARISON OF CODAL RECOMMENDATIONS FOR DESIGN OF UNSYMMETRICAL BUILDINGS Aadil Ahmad Malik 1 , Dr. Pooja Sharma 2 , Dr. Rajesh Goyal 3 , Er. Mudasir Hussain Dar 4 1 M.Tech Scholar(Structural Engg.)DBU Punjab, 2 Deptt. Of Civil Engg. Desh Bhagat University Punjab 3 Astt. Professor, 4 M.Tech Scholar(Structural Engg.)DBU Punjab. Abstract: The research on asymmetric buildings has been extensive primarily focusing on the sta-bility of a structure when subjected to earthquake. Based on them numerous guidelines have been laid out to ensure safety. I have in this paper tried to evaluate the ef-fectiveness of the guidelines provided in the IS: 1893 (2000). Asymmetric buildings are more common now than they have ever been and their popularity has been growing primarily due to the functionality they provide. Due to the frequent earthquakes that India suffers being at the junction of two tectonic plates it has become increasingly important to study Indian buildings for seismic safety. The buildings are analyzed based on the effect of torsion which is the main cause of damage for Asymmetric Buildings. I. INTRODUCTION Structures have been prone to earthquakes since the first structure was built. Earlier accredited to the wrath of gods there have been many elaborate rituals in civilizations around the globe to keep the Gods appeased and cities safe which then evolved into festivals but we now know otherwise. Earthquakes which are some of the most severe natural catastrophes known to man are still a modern menace and though we don't pray our way for safety anymore Earthquake resistance of buildings has taken a more scientific turn and still is a major area of research. Though one of the most catastrophic events in nature earthquakes themselves do not kill people although they may result in some of the highest death toll known. The primary damage caused by an earth quake is to a building or a natural structure and not people. The collapses of such man-made structures like buildings lead to people using them getting crushed or trapped by the debris. The higher the rise the greater is the fall, due to its unique nature earthquakes are more menacing to the more developed urban areas than rural areas as these tend to be more dense populated with more high-rise buildings in a concentrated space for utilizing the expensive commodity effectively. Rapid urbanization has propelled the pri-ority of Earthquake resistance. The limitation of space in urban cities has caused many new changes in the struc-ture of buildings. The apartment complexes used to be a collection of apartments from the ground up while the limitation of parking spaces in the current decade has led to the transformation of the lower floors into parking spaces for the residents. The design though provides utility but also makes the building asymmetric. Seismic damage sur-veys and analyses conducted after the earthquakes have shown that the modes of failure of the structures . It is apparent that the most vulnerable structures are those, which are asymmetric in nature. Hence the seismic behavior of an asymmetric structure has become important. II. AREA OF STUDY This study proposes to analyze the relative effectiveness of the critical torsional provi-sions as supplied by the IS 1893:2002 (Part 1). The study tries to analyze the use of the provision and their effectiveness by designing a structure without considering the torsional provisions and then comparing its ability to resist the effect of earthquake forces in comparison to a structure designed in accordance to the necessary torsional provisions. Scope of Study The effects of the torsional provisions are studied on 4 and 10 story RC frame residential building model 11m in width and 19m in length. The bottom story is about 3.5m in height and the rest are all 3m in height. The effect of the stiffness of the slabs are molded using diaphragm constraints. The building is considered to be symmetric with respect to the stiffness distribution. Only Mass Eccentricity was considered for this problem. The Mass Eccentricity was also assumed to be unidirectional along the length of the structure. The Loading is also taken to be unidirectional. The supports of the structure are assumed to be fixed. The P-4 effect on the structure is not considered in the scope of the study. III. METHODOLOGY The structure was modeled in SAP 2000 for the purpose of analysis the building design and other analysis were also conducted with Etabs. The structures are two models on of 4 stories of 12.5m in height and other is of 10 stories with 30.5m in height structure with 4 bays in the X direction of spans lengths of 4m at the 2 spans at the periphery and the central span is about 3m in length. The structure has 3 spans in the Y direction with the 2 spans at the periphery being 4m each and the central span is about 3m in length. The material assumed is Concrete of grade M20 and the Steel used is Fe 415. The Beams are considered to have a cross-section size of about 300x600m and the columns are made of the same cross section sizes with the longer side along the longer span. The Structure is loaded with a live load of about 3KN/m2 as per the live load requirements from IS 845 Part II assuming the structure to be a residential building. The load was applied to the center of mass at the first try for symmetric building. The center of mass (CM) was then applied at a point 1.9m away from the Centroid of the structure. The design of the structure was designed in Etabs as per IS:456. The designed reinforcements were then taken imported into