A COMPARATIVE STUDY USING ETABS SOFTWARE ON THE WIND ANALYSIS OF G+10 AND G+15 REGULAR AND IRREGULAR VERTICAL HIGH-RISE STRUCTURES SUBJECT TO DIFFERENT WIND GUSTS
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1. The document presents a comparative study on the wind analysis of regular and irregular G+10 and G+15 high-rise structures using ETABS software. 2. 24 building models were developed and analyzed for wind loads at different heights and velocities according to Indian code IS 875(Part 3)-2015. 3. The results show that maximum displacements, drifts, shears, and overturning moments generally increase with wind speed and are higher for irregular structures and taller G+15 buildings compared to regular structures and shorter G+10 buildings.
A COMPARATIVE STUDY USING ETABS SOFTWARE ON THE WIND ANALYSIS OF G+10 AND G+15 REGULAR AND IRREGULAR VERTICAL HIGH-RISE STRUCTURES SUBJECT TO DIFFERENT WIND GUSTS
- 1. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1206 A COMPARATIVE STUDY USING ETABS SOFTWARE ON THE WIND ANALYSIS OF G+10 AND G+15 REGULAR AND IRREGULAR VERTICAL HIGH-RISE STRUCTURES SUBJECT TO DIFFERENT WIND GUSTS K. RAJA SEKHAR1, Assoc. prof Sri. G. GOWRI SANKARA RAO2 1M. TECH structure student, Aditya institute of technology and management, Andhra Pradesh 2Associate professor, civil, Aditya institute of technology and management tekkali, Andhra Pradesh ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - To compete in the ever-expanding competent market, a structural engineer must save time. Etabs software was developed in order to assess and build vertical high-rise structures in front of this. Extended Three-dimensional Analysis of Building Software is known asETABS. Skyscrapers, concrete and steel structures, as well as low- and high-rise buildings, are commonly analyzed using ETABS. The present project deals with a comparative study using etabs software on the wind analysis of g+10 and g+15 regular and irregular vertical high-rise structures subject to different wind gusts. In this study total, ETABS V20 is used to develop and analyses of 24 building models for wind loads. The wind analysis is performed at different heights, such as 35.2 m and 51.2 m, with velocities of 33, 39, 44, 47, 50, and 55 m/s. The comparison of the plan configuration also shows how measures like storey displacement, storey drift, storey shear, and overturning moment response interact. Identifying the most economic regular and irregularstructureinapronezone is the aim of this research. Key Words: regular structure, irregular structure, wind gusts, displacement,drift,storeyshear,overturningmoment, Etabs v20. 1 INTRODUCTION India is coming to understand the value of wind engineering as the need for bigger, more efficient structures develops. In metropolitan regions in particular, horizontal development is no longer a practical solution due to population growth and the scarcity of land. Extremelymassivestructurescanbe built because of modern technology,althoughweinIndia are still not as efficient at utilizing it as other areas of the world are. Due to the scarcity of land available, constructing high- rise structures is becoming a necessity. The traditional method of manual high-rise building design involves a lot of time and runs the risk of human error. Therefore, using computer-based software that speeds up the process and produces more precise results is important. Today's structural engineersutilizeE TABSsoftware,whichcansolve common issues like static analysis and wind analysis while using various loading combinations toverifydifferentcodes. In India, wind engineering is commonly mistaken for wind energy. However, wind engineering is a special branch of engineering where the effects of wind on buildings andtheir surroundings are researched. Wind loads on structural frames must be taken into account when designing beams, columns, lateral bracing, and foundations, while wind loads on claddings must be taken into account when selecting cladding systems for structures. When a structure exceeds 150 meters in height, wind often influences the design. However, lateral forces generated by earthquakes are the other force that has an impact on the majority of high-rise structures. Buildings migrate away from the high-frequency earthquake waves as they get higher and more flexible. In different wind pressure areas of the Indian subcontinent, this study gives wind analyses of high-rise structures. G+10 and G+15 regular and irregular story reinforced concrete framed structures are used for theinvestigation.IS875(Part 3)-2015, an Indian code, is used to assess wind loads. 1.1 Need of research In developing countries, like India, thereisa lotofdemandto develop the cities because more people are moving towards cities due to employment.Duetothegrowing populationand scarcity of land, tall buildings are required with different requirements. In tall buildings, different forces are acting. We must analyze all of the forces acting on the building to ensure its stability 1.2 objective of this study here we have considered 24 models of high-rise buildings i.e., g+15, g+10 regular and irregular buildingswithdifferent wind speed 33,39,44,47,50,55 ms. the compare to the structures' wind analysis results by using the cladding method. To study the structural performance of RC high rise multi storey buildings. to use the ETABS V20 software to analyses both regular and irregular buildings in accordance with IS 875 Part -3 while considering wind speeds of 33, 39, 44, 47, 50, and 55 m/s. To evaluate the effect of wind force on a number of building-related parameters, such as maximum
- 2. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1207 displacements, maximum storey drift, shear force, and a bending moment. To study the comparison of different heights and different shapes of the building based on their result. 2 Literature review Holmes, john (et.al)thearticlecomparesthreecomponents of the Asia-pacific regions wind load estimations using various wind loading standards and regulation. He analyzed the low, medium, and high-rise structures. The hug amount of resonant dynamic response to wind present in the structures makes it more challenging to detect base shear, bending moments, and acceleration at the top of the tall building. The coefficients of variation forthealong-windand cross wind responses, which varied from 14% to 18%, were both relatively low. Pavan p s, seyiekrunuo kire (et.al) when the system beings to move in one direction, a noticeable natural air movement known as wind occurs. This paper presents a comparative study of wind studies. Loads that determine a multistorey buildings design load. According to is 875 (part III):1987, two model are analyzed using the E TABS programme with varying wind speeds. For both high-rise and low-rise structures, a comparison of maximum displacements and story shear has been done. After a thorough investigation, it has been shown that high rise structures are more vulnerable to wind forces than low rise building. Suma devi (et.al) has completed the researchforthisthesis. The provisions that may reduce the effects of pounding, like the separation distance, addition of shear wall, lateral bracings, and variation in storey height of the building, have been taken into consideration for analysis. In this study, E- TABS of 15 and 10 stories. And conclusion is derived bye taking into account both fixed-base and base-isolated situations. Kishore Chandra Biswal floating columns are a basic design element in modern structures in metropolitan India. This study light on the significance of the floating columns presence in the building analysis.Alternativemeasures,such as stiffness balancing of the first and second storey, are suggested to reduce the irregularity caused by the floating columns. Fem codes are created for 2D multi-store frame with and without floating columns in order to analyses how the structure responds to various earthquake excitations with varying frequency contents while maintaining a constant page and time duration factor.Usingetabs,thetime period of floor displacement, drift, base shear, and overturning moment are calculated for frames with and without floating column. 3 METHODOLOGY AND ANALYSIS The current study considers thatsupportconditionsfortheir G+10 and G+15 models of structures with a foundation depth of 3 m are fixed at the bottom of the supports and footings. The buildings are 41.1 meters long, 16.75 meters wide, and 35.2 and 51.2 meters high. M30-grade concrete and Fe415-reinforced steel bars with and without irregularities are evaluated as material qualities for the constructions that were simulated using the ETABS V20 programme. Wind speeds of 33, 39, 44, 47, 50, and 55 m/s are also taken into consideration. The elevations and floor plans of the construction are shown in the figures below. Model 1: regular structurewithG+10consideringwindgusts of 33, 39, 44, 47, 50, and 55 m/s Model 2: irregular structure with G+10 considering wind gusts of 33, 39, 44, 47, 50, and 55 m/s Model 3: regular structurewithG+15consideringwindgusts of 33, 39, 44, 47, 50, and 55 m/s Model 4: irregular structure with G+15 considering wind gusts of 33, 39, 44, 47, 50, and 55 m/s 3.1 DESIGN PARAMETERS Table 1 PARAMETERS OF STRUCTURE S NO PARAMETERS VALUES 1 Materials M30, Fe415 2 consider loads Live, dead, wind, & seismic 3 Heights of building G+10= 31.2, G+15=51.2 4 Depth of the foundation 3 m 5 Height from floor to floor 3.2m Figure 1 plan and elevation and 3D model
- 3. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1208 6 Velocity of wind 33, 39, 44, 47, 50, 55m/s 7 Seismic Zone IV 8 Software E TABS V20 9 Size of columns 800X800 and 600X600 10 Size of beam 600x380 11 Thickness of the slab 150mm 12 thickness of the wall 230mm 13 type of the soil medium 14 Dead load 11.73 kN/m3 15 Live load 3 kN/m3 3.2 DESIGN DATA AS PER IS 875 (PART-III) 2015 Type of building: RCC building with terrain category 1 at G + 10 and G + 15. Height = 38.2, width = 16.5 and length = 41.6. 33, 39, 44, 47, 50, and 55 m/s are the standard wind speeds (VB). VZ = (VB * K1 * K2 * K3 )Design wind speed K1 is the risk coefficient for significant structures or towers. K2 stands for the height and size components of the terrain. K3 = Topography Factor (upwind slope 3O) PZ = 0.6 Vz2 is the design wind pressure. The leeward wind speed is 0.5 and the windward wind speed is 0.8. WALL LOAD CALCULATIONS Thickness of wall * height of wall *density of brick masonry = 0.23*2.6*20=11.73kn/m3 Live load a live load of -3K n/m is considered. According to IS 875 Part 2, live loads are calculated. Figure 2 assigning of live load and dead load 4 RESULT AND DISCUSSION A graphical representation is generated to display these forces and is used to study by comparing the lateral forces, storey displacement, storey shear, overturning moment. Figure 3 displacement of the structure Figure 4 shear force of the structure
- 4. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1209 Figure 5 bending moment of the structure Table 2 : maximum displacement for regular irregular Structures with G+10 and G+15 WIND SPEEDS G+10 G+15 (m/s) REGULAR IRREGULAR REGULAR IRREGULAR 33 0.721 0.928 0.787 2.012 39 0.829 1.296 0.907 2.167 44 0.917 1.65 2.183 2.183 47 1.047 1.883 2.222 2.491 50 1.185 2.131 2.238 2.891 55 1.433 2.578 2.452 3.411 Chart 1: Comparison of the maximum displacement for regular irregular structure with G+10 and G+15. Table 3: maximum drift for regular irregular structure with G+10 and G+15 WIND SPEEDS G+10 G+15 (m/s) REGULAR IRREGULAR REGULAR IRREGULAR 33 0.000026 0.000033 0.000028 0.000029 39 0.00003 0.000046 0.00003 0.000034 44 0.000031 0.000058 0.000032 0.000058 47 0.000033 0.000066 0.000038 0.000066 50 0.000043 0.000075 0.000059 0.000075 55 0.000052 0.000091 0.000066 0.00009 Chart 2: Comparison of the maximum Drift for regular irregular structure with G+10 and G+15 Table 4: maximum storey shear for regular irregular structure with G+10 and G+15 WIND SPEEDS G+10 G+15 (m/s) REGULAR IRREGULAR REGULAR IRREGULAR 33 313.0704 45.1298 372.38 83.75 39 358.0819 63.0325 512.209 116.97 44 398.4907 80.2307 651.964 292.2985 47 454.4907 91.5442 743.899 307.56 50 514.5799 103.6037 841.894 348.085 55 622.6417 125.3604 1018.695 375.6422 Chart 3: Comparison of the maximum storey shear for regular irregular structure with G+10 and G+15
- 5. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1210 Table 5: maximum storey moment for regular irregular structures with g+10 and g+15 WIND SPEEDS G+10 G+15 (m/s) REGULAR IRREGULAR REGULAR IRREGULAR 33 -555.047 87.923 -3179.51 519.9635 39 -638.34 122.8024 -3317.76 726.23 44 -706.17 156.308 -10250.1 4691.089 47 -806.87 178.35 -11695.4 6375.089 50 -912.29 201.84 -13236.1 7214.903 55 -1104.02 244.232 -16015.7 17854.21 Chart 4 : Comparison of the maximum storey moment for regular irregular structures with g+10 and g+15 5 Conclusion The multi storey buildings exposed to different wind forces are examined in this study throughmodellingandanalysisof these building, and the following conclusion is drawn: Wind speed (55, 50, 47, 44, 39, 33 m/s) is the observed order of the effects when lateral forces are applied to a high-rise structure As the wind speedincreases, thedisplacementincreases. The wind’s influence increases when it has a larger impact on high-rise building. It observes that storey drift increases irregular structures when compared to regular structures. The storey shear is more inregularstructurescompared to irregular structures. The storey moment decreases in regular structures when compared to irregular structures. It has been observed that as wind speed has increased, the lateral forces generated on the structures are becoming more severe. Also, it can be concluded that, compared to a regular structure, an irregular structure is more severely affected by wind force. A conclusion that can be drawn from this is that high- rise buildings are more exposed to wind forces than low-rise buildings. Wind speed (55, 50, 47, 44, 39, 33 m/s) is the observed order of the effects when lateral forces are applied to a high-rise structure 5.1 SCOPE FOR FUTURE WORK To compare the study by providing shear wall analysis at a different location. Comparative studying by providing bracings and base isolation and dynamic analysis. Nonlinear time history analysiscanbeperformedonthe high-rise structures 6 REFERENCES 1. Ajitha and M.Naveen Naik, "The Wind and Seismic Analysis on Different Heights of Building Using ETABS," ISSN 2249-6203.The Research Publication, Vol. 5, No. 2, 2016, pp. 19–26. 2. AZZAZ HUSSAIN, AMRUTH K. "A Comparative Study on the Effect of Wind Velocity on Tall Buildings in Different Terrain Categories" ISSN: 2320-2882 | Volume 6, Issue 2, April 2018 | ISSN: 2320-2882. 3. IS: 875:1987 (Part 3), "Indian Standard Code of Practice for Design Wind Loads," Bureau of Indian Standards, New Delhi. 4. Kundan Kulbhushan,Swatantra KumarRao,"Designand Analysis of Residential Multistorey Building (G+5) by Using ETABS," IJSRD: International Journal forScientific Research & Development, 2019, VOL. 7, Issue 03. 5. Mohammed AsimAhmed,ModiAmir,Savita Komur,and Vaijainath Halhalli "effect of laod on tall buildings in different terrain categories" ijret: International Journal of Research inEngineeringandTechnologyeISSN:2319- 1163 | pISSN: 2321-7308. 6. PAWAN R. THAKARE, "Analysis of G+15 High Rise Buildings by Using Etabs for Various Frame Sections in Zone II," May 2022, IJIRT, Volume 8 Issue12,ISSN 2349- 6002,
- 6. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 12 | Dec 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 1211 7. Ranjitha K. P., Khalid Nayaz Khan, et al., "Effect of Wind Pressure on R.C. Tall Buildings Using Gust Factor Method," International Journal of Engineering Research & Technology (IJERT), ISSN: 2278-0181, www.ijert.org, Vol. 3 Issue 7, July-August 2014. 8. Shaikh Muffassir , L.G. Kalurkar "Comparative Studyon Wind Analysis of Multi-storey RCC and Composite Structure for Different Plan Configurations,", IOSR Journal of Mechanical and Civil Engineering (IOSR- JMCE), volume 13, issue 4, ver. VII (july-august 2016), pp. 42–49. 9. Sneha Kawale, Prof. Nandkishor Sinha "multi storied irregular structures subjected to wind force: a review" e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science (Peer-Reviewed, Open Access, Fully Refereed International Journal) Volume:04/Issue:06/June-2022. 10. Wakale Yogesh Namdev, Moon Manish Yewnath,etal.e- ISSN: 2582-5208 International Research Journal of Modernization in Engineering, Technology, and Science Volume:04/Issue:05/May-2022.