Comparative Study of Hot Rolled Steel Sections and Cold Formed Steel Sections for Industrial Shed

Comparative Study of Hot Rolled Steel Sections and Cold Formed Steel Sections for Industrial Shed

Shah Foram Ashokbhai

P.G.Student

Civil (Structure Engineering)Department, Merchant Institute of Technology, Piludara,Mehasana.

Mr. Kaushal R. Thakkar²

²Structure Dynamics Ahmedabad

Mr. Paresh N. Nimodiya³

³Assistant Professor Government Engineering College, Patan

AbstractCold formed steel sections are extensively used in Industrial and many other non- industrial constructions in World wid. It is relatively a new concept in India. So, here in this research, an attempt is being to carry out the comparison between hot rolled and cold formed steel sections. The results shall be checked with the ultimate goal of reducing the tonnage. Structural analysis and design shall be carried out in STAAD.Pro.V8i SS6 by Bentley systems because of its strong analysis engine, easy graphic user interface and universal acceptability.

KeywordsHot rolled sections, cold formed sections, Weight comparison,Linear Elastic Method

1. INTRODUCTION

   The principal objective of this research is to carry out the analysis and design of industrial sheds with 15m span using Hot rolled steel sections and cold formed steel sections. The results shall be achieved with the ultimate goal of reducing the tonnage. Structure analysis and design shall be carried out in STAAD Pro. V8i SS6 Software.

   Cold formed steel is used in building construction, for wall coverings, floor decking etc. Cold formed steel is a basic component in construction of lightweight prefabricated structures like stud frame panels, trusses and portal frames. Cold formed steel sections can be made easily available at any place whereas hot rolled sections difficult to produce.

   In the present work an attempt has been made to find the minimum weight for various steel sections such as hot rolled and cold formed on industrial shed under linear elastic method. The structure is modeled using constant parameters such as bracing systems, height, span with various load combination.

   Figure: 15m span hot rolled structure geometry

   Figure: 15m span cold formed structure geometry

2. LOADING CALCULATION

   No. of Bays in X- Direction=3 No. of Bays in Z- Direction=6 Span of industrial shed =15m Purlin distance=1m

   Height of Industrial shed structure at edge=6m Total Height of structure=8m

   Support condition for hot rolled structure= Hinged Support condition for cold formed structure=Fixed

   Table: 1

   Weight of hot rolled Structure

   Design factors:

   Risk co-efficient =k1=1 k2=0.95 class-A Category -3 k3 factor=1

   Property	Weight (KN)
   ISMC 400	133.531
   ISMB 300	63.003
   ISMB 200	17.035
   ISMC 200	148.809
   ISMC 225	54.071
   ISMC 300	5.034
   TOTAL WEIGHT	421.483
   TOTAL WEIGHT	43008.46 Kg

3. LOADING COMBINATION

   1) DL+LL

   Table: 1

   Weight of cold formed Structure

   Property	Weight (KN)
   250CS80*5	319.224
   TOTAL WEIGHT	319.224
   TOTAL WEIGHT	32573.87Kg

   1. Dead load:

      Self-weight= -1Kn/m

      Member load=0.05*1=0.05kn/m

   2. Live Load:

      Live load on purlin=750-20(-10) Where =14.94

      So 10º

      Live load on purlin=750-20(-10)

      =750-20(14.94-10)

      =651.2 N/m

      =0.651 KN/m

   3. Wind Load 🙁 As per IS:875)

      Wind Load intensity=0.823Kn/ m Wind load factor for

      1. WL+X

      2. WL-X

      3. WL+Z

      4. WL-Z

      5. WL UPWARD

      6. WL DOWNWARD

   4. Wind Speed:

   vb =39m/s

   Design wind pressure= vz Vz=vb*k1*k2*k3

   1. DL+LL+WL+X+WL UPWARD

   2. DL+LL+WL-X+WL UPWARD

   3. DL+LL+WL+Z+WL UPWARD

   4. DL+LL+WL-Z+WL UPWARD

   5. DL+LL+WL+X+WL DOWNWARD

   6. DL+LL+WL-X+WL DOWNWARD

   7. DL+LL+WL+Z+WL DOWNWARD

   8. DL+LL+WL-Z+WL DOWNWARD

      (All Loads are in kN)

4. MODELLING APPROACH

   The STAAD-Pro. V8i SS6 has been used for analysis and design. In this study industrial shed is modeled as a 3D model. In this study two industrial sheds are modelled with same geometric configuration. One industrial shed is modelled with using different beam sections and channel sections with use of hot rolled sections and other industrial shed is modelled by using channel section with use of cold formed sections. Wind load considered is acting in X and Z directions.

   Figure: 15m span hot rolled 3D Industrial shed structure

   Figure: 15m span cold formed 3D Industrial shed structure

   Weight Comparison

   500

   	1
   Hot rolled sectios	421.483
   cold formed sections	319.224

   400

   300

   200

   REFERENCES

   1. Comparative study of hot rolled and cold formed transmission line tower Supriya Khedkar, Shilpa KewateInternational Journal of Emerging Technology and Advanced Engineering (ISSN 2250-2459, ISO 9001:2008 Certified Journal, Volume 5, Issue 8, August 2015)

      100

      0

      Hot rolled sectios cold formed sections

   2. Comparative experimental study of hot formed, hot finished and cold formed rectangular hollow sections Ming shan Zhao, Sing- Ping Chiew, Xing- Zhao Zhang Su liu Case Studies in Structural Engineering 6 (2016) 115129

   3. Comparative study of cold formed steel and hot rolled steel section under compressive loading Salokhe S. A, Patil P. S International Journal of Research Engineering and Technology (2015 eISSN: 2319-1163 | pISSN: 2321-7308

   4. Development of more efficient cold formed steel channel

5. RESULTS AND DISCUSSION

   From the above tables and graph is observe that steel consumption is more in industrial shed structure using hot rolled steel sections as compare to industrial shed structure using cold formed steel sections. The weight is more in industrial shed which use of hot rolled sections.

6. CONCLUSION

The Industrial shed structure of hot rolled sections and cold formed sections with 15m span are design and analyzed using STAAD- Pro. V8i SS6 software. From preceding results and discussion following conclusions can be made:

The weight of industrial shed with cold formed sections are 10435 Kg reduced than industrial shed structure with hot rolled sections. The weight of industrial shed with cold formed sections are reduced with 32.03% than industrial shed structure with hot rolled sections. So from the above conclusion, Industrial shed with cold formed sections is very economical than Industrial shed with hot rolled sections.

ACKNOWLEDGMENT

I would like to articulate my profound gratitude indebtednessto my thesis guide Mr. Kaushal R. Thakkar, Asst. Prof. Paresh

N. Nimodiya who has always been a constant motivation and guiding me. I wish to express my heartiest regards to my parents for their guidance and moral support.

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2. Computational analysis of cold formed steel columns with initial imperfections Marsel Garifullina, Udo Nackenhorstb Procedia Engineering 117 (2015) 1073 1079 (science direct)

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4. Inelastic behavior of cold-formed braced walls under monotonic and cyclic loading Int J Adv Struct Eng (2015) 7:181209

5. Optimum design of cold-formed steel beams using Particle Swarm Optimization method Journal of Constructional Steel Research 122 (2016) 8093

6. Resistance of cold-formed steel sections to combined bending and web crippling Ain Shams Engineering Journal (2013) 4, 435453

1. IS: 801: Code for practice for use of cold formed light Gauge steel structural members in general building construction

2. IS: 800 General Consideration in steel code of practice

3. Steel table