Staad Pro Project Report

8/17/2019 Staad Pro Project Report

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GROUP

7

Design and analysis of

structural systemsusing STAAD Pro

Practical Problem


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2

CEN 300

1.1 Flow of Work

• Introduction

• Scope of work

• Aim of project

• Introduction of analysis and design

• Problem statements

o Structural adequacy analysis of air washer

building using STAAD P! Introduction

Specifications and loading

Analysis and design of critical beam

members

Analysis and design of critical columnmembers "oundation design for critical columns

o Design of circular water tank and compare its

results from theoretical calculation using IS code

method #IS$%%&' Part I() Abstract

Specifications

IS *ode +ethod STAAD Pro analysis of circular tank

*omparison of results obtained by both

methods *onclusion

CE IIT, Roorkee


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1.2 IntroductionIn e,ery aspect of human ci,ili-ation. the need of a ci,il engineer

cannot be understated/ 0ow. more than e,er and especially in a

growing country like India/ In this day and age. multi storied buildings

come up in e,ery nook and cranny of the metropolitan cities/ 1hat

has made this building of such comple structures so quickly possible

is the use of computers to aid in the design process/

There are many classical methods to sol,e design problem. and

with time new software3s also coming into play/ 4ere in this project

work based on software named STAAD Pro has been used/

Two practical problems ha,e been sol,ed to show how STAAD

Pro can be used in different scenarios/ These problems ha,e also

been sol,ed theoretically using the basic concept of loading. analysis.

condition as per IS code and results are then compared/

1.3 Scope of work "ollowing points will be co,ered in project work

• Introduction of STAAD Pro

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• Analysis of the structure in STAAD Pro and interpreting

the results

• 6sing the results to calculate steel reinforcement as

may be the case/

1.4 Aim of project

This project aims for relearning the concept of structuraldesign with the help of computer aids/ 7riefly we ha,e gone

through the following points through out of the project work/

• 6nderstanding of design and detailing concept/

• +ain objecti,e i/e/ learning of STAAD Pro software

package/

• 8earning of analysis and design methodology which can

be ,ery useful in the field/

• Approach for professional practice in the field of

structural engineering/

1.5 Introduction of

Analysis and design

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Analysis : Analysis of the structure means to determination of theinternal forces like axial compression bending moment, shear force

etc. in the component member for which the member are to be

designed under the action of gien external load.

Design$ The design is process of section percussion from the

analysis results by using suitable analysis method. The aim of

design is to achieement of an acceptable probability that

structures being designed will perform satisfactorily during their

intended life.

2. Problem statement 1

Structural design andanalysis of air washer

building after the

construction of a new water

tank on its roof using STAAD

PRO

2/: Introduction$

This report presents the analysis of air washer building in;urgaon. 4aryana/ It was designed to meet both strength

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and ser,iceability requirements when subjected both togra,ity loads and lateral loads/

An additional tank of 2'.''' liters was added on the roof of

the building/ In order to o,ercome additional requirement of a water tank on roof of the building. STAAD Pro can be used

to determine the structural adequacy of the columns and

beams of the structure/

2.2 Air Washer Building%D endering of the Air 1asher building in STAAD Pro$

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2/% Specifications for Superstructure

and Sub structural elements

:/ ;rade of *oncrete$ *olumns$ +29= 7eams$ +2'2/ Steel$ "e5:9%/ Slab thickness$ :9'mm5/ Density of *oncrete$ 29 k0>m?9/ Density of 7rick$ 2' k0>m?mE:'/ Dead 8oads$ "loor load. Slab dead load #%/&9k0>mE) F

"loor finish load #'/mE) B 5/%&9k0>mE::/ 1ater Tank load$ %/:& k0>mE

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2/5 8ocation of water tank o,er first

floor columnGbeam system

*apacity of Tank B2'''' liters

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2/9 8oad combinations

*ombination of 8oads considered in analysis$ The structural

design has been carried out in accordance with thepro,isions of the codes IS 59< H 2''' and IS :C% H 2''2for 0ormal design conditions/Table of 8oad combinations and load factors as per #ef/ IS$59< H 2'''. *I/:C/2/%/:. % Superimposed

8oad. WL B 1ind 8oad. EL B @arthquake load

@arthquake loads ha,e been considered in accordance to IS:C% G 2''2/ 8oad case : and 2 consists of seismic loads/1ater tank load has been included in dead load/

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:'

8oad case combinations are as shown below$

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::

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:2

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:%

2.6 Formulas Used:/ "or 7eams

a/b/

2/ "or *olumns

a/

b/

c/

d/

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:5

2/& Analysis of critical beams

Analysis of the structure was carried out in STAAD Pro/ After

the analysis. using the moment and shear ,alues. we ha,edesigned the critical beam members using limit state method

in accordance IS 59< G 2''2/

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CE IIT, Roorkee


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:9

2/C Analysis of *ritical *olumns

The columns directly under the water tank ha,e been taken

up below$

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CE IIT, Roorkee


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:<

2/ "oundation Design for columns

Si-e of footing

• ;i,en$ Pu B ::&9k0. +u B 2%'k0m. qa B :9'k0>m2 at a

depth of :/29 m/

• As the moment is re,ersible. the footing should be

symmetric with respect to the column/ Assuming theweight of the footing plus backfill to constitute about :9percent of Pu. resultant eccentricity of loading at footingbase. e B 2%':'% >::&9:/:9 B :&: mm

• Assuming e 8>< #i/e/. 8 J < :&: B :'2< mm)

:/:9::&9>78 F 2%'782 K #:9' L :/9 ) k0>m2

3 229 782 H :%9:/298 H :%C' K '

CE IIT, Roorkee


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:&

(arious combinations of width 7 and length 8 can satisfy theabo,e equation/

Assuming7 B :/' m 3 8 M 2 O #7 H b)>2 /N Pro,ide 7 B 29'' mm and 8 B %2'' mm= this gi,es

projection of :''' mm #in the short direction) and :%9' mm#in the long direction)/

Thickness of footing based on shear N "actored #net) soil pressure qu.ma B ::&9 >2/9%/2 F 2%'2/9 %/22

B :5m2N qu.min B :5m

2

#a) !neGway shearN The critical section is located d away from the column face/The a,erage pressure contributing to the factored oneGwayshear is

qu B 2''/&C H 9%/ L #:%9' H d)>2Q>:m2 #assuming d B


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:C

N Assuming Rc B '/%< +Pa #for + 2' concrete with nominal pt B '/29).

(uc B '/%< L 29'' L d B #''d) 0(u: K (uc 3


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N cantile,er projection B :''' mm. width B %2'' mm.dy B 59: mm. qu ,aries along the section XX. with ana,erage ,alue of '/:5mm2 at the middle/*onsidering a slightly greater ,alue #mean of ,alues

at centre and footing edge).qu O #'/:5mm

2 N +uy B '/:&%&9 L %2'' L :'''

2 >2) B 2&C L :'< 0mm3 Y +u>bdy2 B2&C:'#%2''59:2) B '/52&+Pa3 #pt)> :'' B 2'> #2 5:9) : G:G5/9CZ'/52&>2' B'/:2: L :' H2 3 #Ast)reqd B '/:2: L :' H2 L %2'' L 59: B :&92 mm2

#Ast)min B '/'':2 L %2'' L 99' B 2::2 mm2 J :&92

mm2

N 0umber of :2 [ bars required B 2::2>::% B : As the difference in dimensions between the two sides#7 B 29'' mm. 8 B %2'' mm) is not significant. it suffices to pro,ide these bars at auniform spacing/N Pro,ide : nos :2 [ bars in the short direction atuniform spacing/

N De,elopment length required B 5&/' L :2 B 9


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2:

footing beyond the bend/ A total etension of 5 L 29 F 95: B


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3. Problem statement 2

Design of circular water tankand comarison of the

results with that obtainedfrom theoretical calculations

using 4S code method -4S5

##*" Part 46/

%/: Abstract$Storage reser,oirs and o,erhead tank are used to store

water. liquid petroleum. petroleum products and similar

liquids/ The force analysis of the reser,oirs or tanks is about

the same irrespecti,e of the chemical nature of the product/

CE IIT, Roorkee


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2%

All tanks are designed as crack free structures to eliminate

any leakage/

%/2 Problem Specifications

:/ *apacity of tank B 5'.''' litres2/ Depth of water B 5 m%/ Thickness of membrane B :


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CE IIT, Roorkee


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%/5 Solution using STAAD Pro

%D endering of the *ircular Tank in STAAD Pro$

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2<

*ross Sectional ,iew of *ircular tank$

4ydrostatic load applied to the water tank$

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2&

%/9 *omparison of 4oop Tension.+oment and Shear in the water tank$

CE IIT, Roorkee

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2C

%/< *onclusion

1e can see that the ,alues found from STAAD are generally

in agreement to the ,alues in the IS *ode/ In most cases.the ,alues gi,en by the code are more conser,ati,e ,alues/

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