ANALYSIS OF G+2 MONO-COLUMN BUILDING FOR DIFFERENT PLAN CONFIGURATIONS WITH THE SAME PLAN AREA USING

ANALYSIS OF G+2 MONO-COLUMN BUILDING FOR DIFFERENT PLAN CONFIGURATIONS WITH THE SAME PLAN AREA USING STAADPRO

1Assistant professor, Department of civil engineering, SVECW, Andhra Pradesh, India.

2Assistant professor, Department of civil engineering, SVPEC, Andhra Pradesh, India.

3B. tech student, Department of civil engineering, SVECW

Abstract - During the monsoon season, due to the floods, water reaches the ground story of the building and causes a problem for the occupants of the building. So, to avoid these problems, we use mono-column structures. In this geometry such as rectangular, pentagonal, and circular are analyzed. The building plans are drawn in Auto-cad 2023 software. The plan area of each mono-column building was taken as 1000 sq. ft. Then modeling and analysis were carried out using the Staad-pro software as per Indian standards. The analysis for buildings was carried-out under seismic zone III. The cross-section for each mono-column was taken as a square of side 1m. The parameters such as displacement, bending moment, and shear force for each building's structural components are studied and later compared.

Key Words: Auto-Cad, Design of building, Equivalent static analysis, Mono-column structure, Seismic analysis, Staad-pro.

1. INTRODUCTION

In India some parts of the country like Andhra Pradesh, Tamil Nadu, and West Bengal experience cyclones, which areoftenaccompaniedbyheavyrainfallleadingtoflooding in the monsoon season. During such cases,the water level reachesapproximatelythefirstfloorofthebuilding.Oneof thebestsolutionsforthisproblemistorisethelivingarea higher from the ground level. So, the mono-column buildingsareveryeffectivetocontrolfloods.

Andalso,withtheincreaseinpopulation,theavailabilityof land decreases, and the cost of land increases. The total cost of the construction includes the cost of building and land cost also. So, to reduce the cost of the building by reducing the foundation cost and excavation cost, monocolumnstructuresareconstructed.Astheyarerestingona single column, the area required for the foundation is less sothefoundationcostaswellastheexcavationcostisalso reduced. They require less ground space as require less area for providing the foundation And the remaining spacingisusefultoprovideforparking.

1.1 Monocolumn Structure

A building that is supported on a single column is calledamono-columnstructure.Theyrequirelessground

spaceasrequiredlessareaforprovidingthefoundationso that more space is available for parking. A structure supported on a single column provides a better architectural view compared to a structure supported on manycolumns.Theyarealsounique.

1.2 Objectives of the Present Project

1. To develop plans for the different shapes of the sameplanarea.

2. Toanalyzea model oftheMonocolumnstructure for different plan configurations with the same plan area such as rectangle, circular, and the pentagoninStaad-Prosoftware.

3. ToanalyzethestructureasperIndianstandards.

4. To compare three different mono-column buildings based on analysis in the STAAD-pro software.

2. LITERATURE REVIEW

Madireddy Satyanarayana [2016]: They take this project to analyze the design of mono-column by using different code provisions available They draw a layout planoftheproposedbuildingdrawnbyusingAUTOCADD 2010. The structure consists of six floors including the ground floor, with each floor having one house. The staircase must be provided separately. The planning in theirstudyisdoneasperIndianstandardcodeprovisions. Frames are analyzed by using various textbooks as references Using thisso manystandard books analyses of bending moment, shear force, deflection, end moments, and foundation reactions are calculated are given in this paper.

T. Subramani (2019): The purposeofthis study istolay outawholebuildingrelaxationonasingle-columndesign. This paper finds that the express boost in population and scarcity of land tends to the progress of construction technology and high-rise structures This building is composed.Asingle-columnstructureisoutoftheordinary mono-columnstructure.

Basavaraju S N (2020): This paper describes that from static and dynamic analysis, the Storey displacement, Storey drift, Storey shear, and overturning moment of all shapes increase as we go to a higher seismic zone. 5. Storey displacement & Storey drift are less in circular shape structure and more in rectangular shape mono columnstructureinallseismiczonesofIndia.Accordingto this paper story shear, overturning moment, and story stiffness are minimum in square shape structures and maximum in triangular shape mono column structures in all seismic zones of India. The Time-period is more for rectangularshapesandlessforcircularshapesandmonocolumnstructuresgivenbyconductinganalysis

Gomasa Ramesh (2021): In this study multi-story building with a single-column construction has been successfully engineered to withstand all loads, including earthquakeloads.Inthisstudy,theystatethatunderstatic loading conditions, RCC columns have adequate results. STAAD-Pro advanced software provides us with a platform for analyzing and designing structures that is fast, reliable, simple to use, and accurate. The ultimate strengthandserviceability ofthebuildingmustbemetby thestructuraldesign.

3. METHODOLOGY

Themethodologyofourprojectisshowninthebelowflow chart.

drawings.ThebuildingisarrangedinzoneIII.Theseismic zonecoefficientistakenas0.16accordingtoIScode.

4. ANALYSIS OF MONO-COLUMN STRUCTURE

Specifications of the mono-column buildings are shown in thetablebelow.

4.1Structural plans of building

Thestructural plansarefurtherrequiredto analyzeinthe Staadprosoftware.

3.1Loads And Load Combinations

The loads acting on the structure are calculated based ontheIS875-1987(part1andpart2).TheIS875-1987is acodeofpracticefordesignloads(otherthanearthquake loads)thatdealswiththemagnitudeofsuchloadsthatare being used for designs in India. And the earthquake loads in our study are calculated as per IS 1893-2002. Load combinations are taken as per Table no. 18 from IS 4562000.

3.2Structural Analysis

The models of G+2 story for mono-column buildings such as rectangular, pentagonal, and circular are created, investigated,andconfiguredusing Staad-pro V8isoftware. Auto-cad 2023 was used for the planning of building

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4.2

Thefollowingisthe3Dviewofmono-columnbuildings.

4.3 Analysis result

The results obtained from the analysis are displacement, bendingmoment,andshearforce.

4.3.1Displacement

The displacement produced by the rectangular, pentagonal,andcircularmono-columnbuildingsoccursas shownbelow

4.3.2Bending

The bending moment produced by the rectangular, pentagonal,andcircularmono-columnbuildingsoccursas shownbelow.

4.3.3Shear

The shear force produced by the rectangular, pentagonal, and circular mono-column buildings occurs as shown below.

5. RESULTS AND DISCUSSIONS

In this chapter, the results which are obtained from the analysisarediscussed.

5.1Displacement

Displacement of mono-column buildings such as rectangular shape buildings, pentagonal shape buildings, and circular shape buildings are obtained by analyzing as shownbelow.

 Maximum displacement occurs in the rectangular shape mono-column building due to the action of loadsis83.78mm.

 Maximum displacement occurs in the pentagonal shape mono-column building due to the action of loadsis42.52mm.

 Maximum displacement occurs in the circular shape mono-column building due to the action of loadsis41.07mm.

5.2 Bending Moment

Bending moment developed in beams of mono-column buildingssuchasrectangularshape,pentagonalshape,and circularshapeoccurasfollow.

Bending moment developed in columns of mono-column buildingssuchasrectangularshape,pentagonalshape,and circularshapeoccurasfollow.

Shear force in beams of mono-column buildings such as rectangular shape, pentagonal shape, and circular shapes occurasfollows.

Shear force developed in columns of mono-column buildings such as rectangular shape, pentagonal shape, andcircularshapesoccursasfollows

6. CONCLUSIONS

We prepared the building plans using Auto-cad software and then analyzed G+2 mono-column buildings using the Staad-prosoftware.

The following conclusion can be drawn out from the analysis:

Displacement:

Displacement of the building occurs maximum in case of rectangle shape and minimum in case of circular shape building.

 Maximum displacement occurs in the rectangular shapebuildingis83.785mm. Displacementinthis buildingis102%greaterthanthedisplacementin thecircularshapemono-columnbuilding.

 The maximum displacement that occurs in the pentagonal shape building is 42.52 mm. Displacement in this building is 2% greater than the displacement in the circular shape monocolumnbuilding.

 Maximum displacement occurs in the circular shapebuildingis41.079mm

Bendingmomentandshearforceinbeams:

 Bending moment and shear force in longitudinal beams occur maximum in the case of circular shape buildings and minimum in the case of pentagonalshapebuildings.

 Bendingmomentandshearforceinlateral beams occur maximum in the case of rectangular shape buildings and minimum in the case of circular shapebuildings

Bendingmomentandshearforceincolumns:

 The bending moment and shear force of center columnsoccurmaximuminthecaseofrectangular shapesandlessinthecaseofcircularshapesinthe topandmiddlestoriesofthebuilding.

 The bending moment and shear force of end columnsoccurmaximuminthecaseofrectangular shapesandlessinthecaseofpentagonalshapesin thetopandmiddlestoriesofthebuilding.

 The bending moment and shear force of monocolumnoccurmaximuminthecaseofrectangular shapesandlessinthecaseofpentagonalshapesin thebottomstoryofthebuilding:

 The bending moment is 2717kN-m and the shear force is 387kN in a mono-column of rectangular shape building. The bending moment and shear force in the mono-column of a rectangular shape building are134% & 133% greater than the bending moment and shear force in the monocolumn of a pentagonal shape building respectively.

 The bending moment is 1161kN-m and the shear force is 166kN in the mono-column of the pentagonalshapebuilding.

 The bending moment is 1239kN-m and the shear forceis193kNinamono-columnofcircularshape

building. The bending moment and shear force in the mono-column of circular shape building are 6% and 16% greater than the bending moment and shear force in the pentagonal shape building respectively.

So finally, the relative maximum displacement of the building, bending moment, and shear force in the monocolumn occur less in the case of a pentagonal shape buildingcomparedtoothershapesofthebuilding.

REFERENCES

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