Structural Analysis and Design of an Auditorium using Extended-3D Analysis of Building System

Structural Analysis and Design of an Auditorium

using Extended-3D Analysis of Building System

Ashwini Mareena Sam

, Devika J S

, Panchami P S

, Muhammad Salih N

, Rajeev Kumar P

1, 2,,3,4

IV yr BTech students;

Professor

Department of Civil Engineering

Musaliar College of Engineering & Technology, Pathanamthitta, Kerala

Abstract — This technical paper highlights the project work

pertaining to the structural analysis and design of a

multipurpose auditorium using a computer software,

Extended3D Analysis of building System, abbreviated as

ETABS

. Shape of the auditorium was linear (rectangular). This

includes planning, analysis of loads and designing of structural

elements based on different loading conditions. Planning of

acoustic and vision point of view were taken from National

Building Code, and the limit state method of collapse using

respective IS codes. AutoCAD

was used for drawing plan,

elevation and section of auditorium. Design and analysis were

done manually and the results were verified using ETABS

. For

completeness a cost estimation was also performed. Such a work

would enable the economic design of an auditorium.

Keywords— Structural analysis; design, ETABS

, AutoCAD

auditorium, cost estimation

I. INTRODUCTION

An auditorium is a multipurpose facility where a room

built to enable an audience to hear and watch performances.

For movie theatres, the number of auditoria (or auditoriums) is

expressed as the number of screens. Auditoria can be found in

entertainment venues, community halls, and theatres, and may

be used for rehearsal, presentation, performing arts

productions, or as a learning space. Seating arrangements in

an auditorium seating layout (or assembly space) are either be

identified as “multiple-aisle” or “continental.” These terms are

commonly found in design standards manuals, building codes,

and similar architectural reference documents. Each size is

unique, with specific guidelines governing row size, row

spacing, and exit ways. Basically, a multiple-aisle

arrangement will have a maximum of 14–16 chairs per row

with access to an aisle-way at both ends. In a continental

arrangement, all seats are located in a central section. Here the

maximum quantity of chairs per row can greatly exceed the

limits established in a multiple-aisle arrangement. In order to

compensate for the greater length of rows allowed, building

codes will require wider row spacing, wider aisles, and

strategically located exit doors. Although it would seem like

more space is called for, a continental seating plan is often not

any less efficient than a multiple-aisle arrangement. In fact, if

it is carefully planned, a continental arrangement can

frequently accommodate more seating within the same space

[1].

Many researchers have conducted works in this area [2]-

[5]. Objective of this paper is to perform the structural

analysis and design of a multipurpose auditorium for a seating

capacity of 1000 audience, at Pathanapuram municipality,

Kerala state. In this paper details of the analysis and design of

an auditorium done by the software package called as

ETABS

. ETABS

is the abbreviation of "Extended 3D

Analysis of Building System” [6]. For completeness, a cost

estimation for construction is also performed. It is thought that

such a study would help to perform an economical and

environment friendly design and construction of an auditorium

at this location.

II. LOCATION DETAILS OF THE SITE

The proposed site is at Pathanapuram municipality,

Pathanamthitta district, Kerala state. Figure 1 shows the

proposed site and Table 1 gives the details of the proposed

auditorium:

Fig. 1. Proposed site in Pathanapuram, Kerala state

TABLE I. DETAILS OF PROPOSED AUDITORIUM

District/State

Pathanamthitta/Kerala

Municipality/Taluk

Pathanapuram

Type of auditorium

Multipurpose

Type of soil in the site

Lateritic soil

Type of structure

RCC/steel

Estimated capacity

1000

Estimated Area

10764 sq. ft.

Estimated Area of Auditorium

8000 – 10000 sq. ft

III. ANALYSIS AND DESIGN OF AUDITORIUM

A: PLANNING OF AUDITORIUM

A number of standard codes approved by Indian Standard

institutions has specified the following minimum

requirements for the construction of the auditoriums:

International Journal of Engineering Research & Technology (IJERT)

ISSN: 2278-0181http://www.ijert.org

IJERTV9IS060038

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1. FRONT AND REAR OPEN SPACES:

No person shall erect a building unless it is set back at

least 6m from the regular line of the street or from the street

if no such regular line exists.

2. PLAN AREA:

Plan area of the building is to be fixed at an occupant load

of range 0.6 to 0.9 m

/member.

Drawings were done using AutoCAD

. Details of the step-

by-step procedure can be obtained from [7]. Site plan, front

elevation, side elevation, cross-section and plan are shown in

Figures 2 to 6. Different components of the auditorium are

given in Table 2.

Fig 2. Auditorium site planning

Fig 3. Auditorium front elevation

Fig 4. Section of auditorium

Fig 5. Auditorium side elevation

Fig 6. Auditorium plan view

B: ETABS ANALYSIS

As discussed in the above sections, structural analysis was

done using ETABS

. Different steps involved in the process

is shown below.

TABLE II: COMPONENTS OF THE AUDITORIUM

Components

Standard Sizes

Size Provided

Quantities

Provide

Side Entrance

1.5-3m

1.5 m

Main entrance

1.5m

1.5 m

Total seats at

ground floor

0.45-0.65m

0.5m × 0.46m

1000

no of seats per

row

0.45-0.65m

0.5m × 0.46m

no of seats per

Coloumn

0.45-0.65m

0.5m × 0.46m

Steps provided at

entrance

As per planning

3.5 m

Steps guiding to

stage

As per planning

1.7 m

6 at each

side

Distance between

two chairs for

circulation

At least 0.85 m

0.87 m

Changing room

As per planning

3 × 4 m

Gents Toilet

As per planning

1.5 × 1.5 m

Ladies Toilet

As per planning

1.5 × 1.5 m

The structure created in the ETABS

is shown in Figure 7.

Inbuilt algorithms in the software do the analysis of the

structure and give the output files. Figures 8 and 9 show the

loads applied on the structure and the output of final analysis

output respectively. From the output files different standard

sections can be obtained and it is used for the construction.

International Journal of Engineering Research & Technology (IJERT)

ISSN: 2278-0181http://www.ijert.org

IJERTV9IS060038

(This work is licensed under a Creative Commons Attribution 4.0 International License.)

Published by :

www.ijert.org

Vol. 9 Issue 06, June-2020

Fig 7. Structure created in ETABS

Fig 8. Loads applied on the structure

Fig 9. Output of analysis of the structure

IV. CONCLUDING REMARKS

This work highlighted the analysis and design of a

multipurpose auditorium at Pathanapuram municipality,

Kerala state using ETABS

software. Preliminary drawings

were done using AutoCAD

. For completeness, a cost

estimation for the construction was also carried out and the

estimated cost was found as Rs 1,22,00000/-.

REFERENCES

[1] National Building Code of India (2018), Bureu of Indian Standards,

New Delhi.

[2] Ch. Pratyusha et al(2017) PLANNING, ANALYSIS AND DESIGN

OF AUDITORIUM, International Journal For Technological Research

In Engineering Volume 4, Issue 12

[3] Bhoite et al(2017) Design Of College Auditorium For PES College Of

Engineering, Phaltan, International Journal of Informative & Futuristic

Research, 7 ,6851-6858.

[4] Sri Priya et al(2018) Design of an Auditorium Building, International

Journal of Innovative Research in Science, Engineering and

Technology, Vol. 7, Issue 4.

[5] Shivam Asawa et al (2017) Structural Design of Concrete Structure

Using E-Tabs IOSR Journal of Mechanical and Civil Engineering,

Volume 14, Issue 1 PP 49-51

[6] ETABS v16 (2018) Computures and structures Inc. USA

[7] AutoCAD (2018) AutoDESK Inc, USA.

[8] Ramamrutham S (2016), Design of RC Structures. S Dhanpat Rai

publications, New Delhi

[9] Norris C.H. and Wilbur J (1991), Elementary Structure Analysis, 10th

Edition, McGraw-Hill company limited, New York.

[10] IS: 875 (1987), Part III - Code of Practice for Design Wind Loads for

buildings. Bureu of Indian Standards, New Delhi.

[11] IS 456:2000 Plain Concrete – Code of practice, Bureu of Indian

Standards, New Delhi.

International Journal of Engineering Research & Technology (IJERT)

ISSN: 2278-0181http://www.ijert.org

IJERTV9IS060038

(This work is licensed under a Creative Commons Attribution 4.0 International License.)

Published by :

www.ijert.org

Vol. 9 Issue 06, June-2020