Magazine

A study on seismic analysis of steel fiber reinforced concrete column frame ijaerdv04i0597324mm

Description
Scientific Journal of Impact Factor (SJIF): 4.72e-ISSN (O): 2348-4470 p-ISSN (P): 2348-6406International Journal of Advance Engineering and Research Development…
Categories
Published
of 7
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
Share
Transcript
Scientific Journal of Impact Factor (SJIF): 4.72e-ISSN (O): 2348-4470 p-ISSN (P): 2348-6406International Journal of Advance Engineering and Research Development Volume 4, Issue 5, May -2017A Study On Seismic Analysis of Steel Fiber Reinforced Concrete Column Frame 1Sreelekshmi.S, 2Chinnu Sara Prasad12M Tech Student, Sree Narayana Institute of Technology, Theppupara, Adoor, Kerala Assistant Prof., Department of Civil Engineering, Sree Narayana Institute of Technology, Theppupara, Adoor, KeralaAbstract— An earthquake is the result of a sudden release of energy that creates seismic waves. Experience during the past earthquakes has demonstrated that many common buildings and typical methods of construction lack basic resistance to earthquake forces. Steel fiber reinforcement is widely used as the main and unique reinforcing for industrial concrete floor slabs, shotcrete and prefabricated concrete products. This paper refers to the comparison between Steel Fiber Reinforced Concrete (SFRC) and conventional building frames. In this paper an eight storied office building is analyzed using ETABS software. Keywords—Steel Fiber Reinforced Column , ETABS , Seismic waves , Earthquake. I. Introduction SFRC is a composite material made of hydraulic cements, water, fine and coarse aggregate, and a dispersion of discontinuous, small fibers. It may also contain pozzolans and admixtures. Steel fiber reinforced concrete is basically cheaper and easier to use form of rebar reinforced concrete. Rebar reinforced concrete uses steel bars that are laid within the liquid cement, which requires a great deal of preparation work but makes a much stronger concrete. All admixtures meeting ASTM specifications for use in concrete are suitable for use in SFRC. Unlike welded wire reinforcement or rebar, which is specifically located in a single plane, steel fibers are distributed uniformly throughout the concrete matrix. Steel fibers are introduced into the concrete at the batch plant or jobsite.II. Scope The scope of the study are  To get a better idea of modern building techniques.  The comparative study between SFRC and conventional building.  To investigate the effect of story displacement, drift and shear in both frames.III. Steel fiber reinforced concrete (sfrc) The fiber reinforcement may be used in the form of three – dimensionally randomly distributed fibers throughout the structural member. The added advantages of the fiber are shear resistance and crack control. In general, SFRC is very ductile and particularly well suited for structures which are required to exhibit:  Resistance to impact, blast and shock loads and high fatigue.  Shrinkage control of concrete (fissuration).  Very high flexural, shear and tensile strength.  Resistance to splitting/spalling, erosion and abrasion.  High thermal/ temperature resistance.  Resistance to seismic hazards. IV. Model and analysis In this study the primary objective is to investigate the behavior of SFRC column. An 8 storied (G+7) office building is considered. The response spectrum analysis of the frame is done using ETABS. The building description is shown in table1.@IJAERD-2017, All rights Reserved465International Journal of Advance Engineering and Research Development (IJAERD) Volume 4, Issue 5, May-2017, e-ISSN: 2348 - 4470, print-ISSN: 2348-6406 TABLE 1. Building Description No of Stories8 (G +7)Beam size300mm X 400mmColumn size400mm X 400mmSlab thickness150mmZoneIVImportance factor1Floor load2.5 kN/mRoof load1.5 kN/m2Floor finish1 kN/m2Roof finish1 kN/m2Story height Bays in x and y direction Bay width in xdirection Bay width in ydirection3m 4 5 4For modelling of SFRC frame the properties of hooked steel fiber where taken. The properties of steel fiber is given in Table 2. Steel fiber of 1% of concrete is taken for the analysis, which is the optimal value when gone through the literature survey. For the purpose of comparison a conventional building with same parameter is being modelled and analyzed. Table 2: Properties of Steel Fibers PropertyValueDiameter0.75 mmLength of fiber60 mmTensile strength Modulus of Elasticity Specific Gravity1050 MPa 200 GPa 7.8Fig. 1. Plan of building @IJAERD-2017, All rights Reserved466International Journal of Advance Engineering and Research Development (IJAERD) Volume 4, Issue 5, May-2017, e-ISSN: 2348 - 4470, print-ISSN: 2348-6406Fig. 2. Model of buildingFig 3: Cross section of columnV. Results and discussion In the frames loads are given .Analysis is done using E-TABS software. Response spectrum analysis is done to find out the seismic behavior of the SFRC and conventional building. The tables for story drift, story displacement, time period and story shear are obtained. Corresponding graphs are plotted with the tables obtained. The tables and graphs obtained are shown below. TABLE 3. Story Shear for Column Frames ElevationStory shear (kN)Story mConventionalSFRCBase Story1 Story2 Story3 Story4 Story5 Story6 Story70 3.1 6.1 9.1 12.1 15.1 18.1 21.1360.7303 360.7303 350.7121 328.2586 294.6364 251.1176 198.6661 138.0369616.7655 616.7655 599.3467 560.7738 503.309 429.1162 339.8003 236.6169Story824.169.6481120.2575@IJAERD-2017, All rights Reserved467International Journal of Advance Engineering and Research Development (IJAERD) Volume 4, Issue 5, May-2017, e-ISSN: 2348 - 4470, print-ISSN: 2348-6406Fig.4 . Story Shear in each story It is seen that SFRC column frame shows higher base shear than that of conventional column frame. TABLE 4. Story Drift for Column Frames StoryElevationStory DriftmSFRCConventionalBase000Story13.10.0005990.000395Story26.10.0008890.000601Story39.10.0008760.000596Story412.10.0007960.000542Story515.10.0006840.000465Story618.10.0005460.000371Story721.10.0003870.000262Story824.10.0002210.00015Fig.5. Story Drift for each story @IJAERD-2017, All rights Reserved468International Journal of Advance Engineering and Research Development (IJAERD) Volume 4, Issue 5, May-2017, e-ISSN: 2348 - 4470, print-ISSN: 2348-6406 TABLE 5. Maximum Story Displacement for Column frames StoryElevationStory Displacement(mm)mSFRCConventionalBase000Story13.10.9221.011Story26.12.5162.485Story39.14.2043.93Story412.15.7765.232Story515.17.1316.34Story618.18.2087.222Story721.18.9767.846Story824.19.4468.202Fig. 6. Maximum story displacement for each stories TABLE 6. Time period for Column Frames Period (sec) Mode NoSFRCConventional10.9920.97920.9380.94330.8390.84140.3220.31750.3050.30760.2730.27370.1840.1880.1750.17690.1570.157100.1240.121110.120.12120.1070.106@IJAERD-2017, All rights Reserved469International Journal of Advance Engineering and Research Development (IJAERD) Volume 4, Issue 5, May-2017, e-ISSN: 2348 - 4470, print-ISSN: 2348-6406Fig.7. Time period for each modeVI. Conclusions Comparison between SFRC and conventional building frame was done and the following conclusions were made.  There is 71% increase in base shear for SFRC column frame when compared with conventional column.  An increment on 47% is seen in SFRC than conventional frame.  Story displacement is higher in the case of SFRC frame.  Time period of both frames are approximately equal.VII.   Future ScopesA study on SFRC of other percentages. Investigation by replacing steel fibers by others like glass fibers. Study on the parameters that depends the characteristics of steel fiber and SFRC.Acknowledgement The author(s) wish to express their gratitude to Dr. P.G. Bhaskaran Nair, PG Dean, SNIT, Adoor for his valuable suggestions, encouragement and motivation. Above all we thank GOD Almighty for his grace throughout the work. References [1] [2] [3] [4] [5]ACI Committee 440. 1996. State-of-the-Art Report on Fiber Reinforced Plastic (FRP) for Concrete Structures (ACI 440R). ACI Manual of Concrete Practice, Part 5, American Concrete Institute, Detroit, MI, pp-68. ACI Committee 544. 1982. State-of-the-Art Report on Fiber Reinforced Concrete (ACI 544.1R-82). Concrete International, May, Vol. 4, No. 5, pp. 9-30. Ahmed Kamil Tanrikulu, Serkan Tokgoz and Cengiz Dundar ―Experimental behavior of steel fiber high strength reinforced concrete and composite columns‖, Journal of Constructional Steel Research 74 (2012): 98-107. A.M. Shende, A.M. Pande, M. Gulfam Pathan," Experimental Study on Steel Fiber Reinforced Concrete for M-40 Grade", International Refereed Journal of Engineering and Science 23(2012): 43-48 Nataraja, M. C., Dhang, N and Gupta, A. P, ―Splitting Tensile Strength of Steel Fiber Reinforced Concrete”, Indian Concrete Journal, 75(2001): 287-290.@IJAERD-2017, All rights Reserved470International Journal of Advance Engineering and Research Development (IJAERD) Volume 4, Issue 5, May-2017, e-ISSN: 2348 - 4470, print-ISSN: 2348-6406 [6] [7] [8] [9] [10] [11] [12] [13]Nataraja, M. C., Dhang, N and Gupta, A. P (2001). ‗Splitting Tensile Strength of Steel Fiber Reinforced Concrete‘, Indian Concrete Journal, Vol. 75, No. 4, April 2001, pp. 287-290. Nataraja, M. C., Dhang, N and Gupta, A. P (1998), ‗A Study on Steel Fiber Reinforced Concrete Composite Using Pulse Velocity Technique‘, Indian Concrete Institute Bulletin, No. 65, Oct.-Dec. 98, pp. 25-27. Nataraja, M. C., Dhang, N and Gupta, A. P (1998), ‗Steel Fiber Reinforced Concrete under Compression‘, The Indian Concrete Journal, Vol. 72, No. 7, July 1998, pp. 353-356. Ramana Gopal, S, Devadas Manoharan, P., ―Tests on Fiber reinforced Concrete-filled Steel tubular Columns‖, Steel and Composite Structures, (2004)1: 37-48. Serkan Tokgoz, Cengiz Dundar, ―Experimental behavior of steel fiber high strength reinforced concrete and composite columns‖, Journal of Constructional Steel Research74 (2012) 98–107. Soner Guler , Erol Lale , Metin Aydogan, “Behaviour Of Sfrc Filled Steel Tube Columns Under Axial Load”, Advanced Steel Construction 9 (2013): 14-25 IS 456: 2000, ―Code of Practice for Plain and Reinforced Concrete‖, Bureau of Indian Standards, New Delhi. IS 1893: 2002, ―Criteria for Earthquake Resistant Design of Structures – general provisions for buildings (Part-1)‖, Bureau of Indian Standards, New Delhi, 2002.@IJAERD-2017, All rights Reserved471
Search
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks
SAVE OUR EARTH

We need your sign to support Project to invent "SMART AND CONTROLLABLE REFLECTIVE BALLOONS" to cover the Sun and Save Our Earth.

More details...

Sign Now!

We are very appreciated for your Prompt Action!

x