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For the analysis of Truss in ETABS, I use

the example 3.2 from structural analysis

by R.C Hibbeler ,here is the example 3.2

determined the force in each member of

the roof truss shown in the figure the

dimensions and loadings are shown in the

figure also state whether the members

are in the tension or compression we

have to also find whether these members

are in tension condition or in the

compression condition for the modeling

of truss in etabs I have created the

grid you can see 1 2 3 4 5 6 7 grids in

the x-direction 1 2 3

grids in the Z direction you can say y

direction but in etabs software the

vertical axis is the z axis and this is

one point 1 5 4 7 meter you can find by

trigonometric method so similarly 2

point 3 1 meter and each base trust

members are 4 meter 4 meter 4 meter so

so the joint distance is 2 meter 2 meter

2 meter 2 meter in 2 meter before

analyzing the trust in the a tabs we

should memorize our basic concept their

trust members are connected together at

their joints only trust are connected

together by friction less pins the truss

structure is loaded only adjoints the

weight of the members may be neglected

for the analysis but part in the actual

in the real situations we cannot ignore

that bit of the member but this for the

study purpose will ignore the weight of

the truss members so now we will move

for the modeling of the truss member in

etabs

Here I am opening my ETF software 2016

it will take some time

now I will start from scratch file you

can start new model from here and also

from the file file new model model

initialization there are three settings

so far you can use user default settings

so I am moving from scratch file so

that's why I am clicking use built-in

setting with my problem is in metric SI

system so that's why I will select

metric SI unit system and steel section

database if you are designing then

that's it's important you weathers like

f p system or SI system section database

steel design code that definitely for

design purpose there it is concrete

design code I am clicking okay now here

is a great option so I will again go

back and check how many dudes in the

x-direction 1 2 3 4 5 6 7 and in the

Direction 3 1 2 3

so here number of codes in the

description 7 number of words in the

y-direction no need

so that's one is okay in spacing in

x-direction is 2 meter in the

y-direction again is not naked i will

discuss why i am putting in the

y-direction 1 meter when we do analyze

problems in in our classes or in theory

classes we use XY system but in software

the horizontal axis is X and the

vertical axis is Z so I will put my H is

the vertical axis in which number of

stories so basically there are two

stories

and story height is 1.15 for seven meter

first story and second two point three

one meter one point one point one five

four seven and the bottoms that is the

bottom story height and the typical

story hide for the rest of stories that

is two point three one two point three

one meter okay now I am clicking grid

only okay

here now you are saying to Windows 3d

view and plan you so I will just click I

will close one window and I am going to

work only in one window elevation one

line so here you can see 1 2 3 4 5 6 7

grids in the X 1 2 3 grids in the

extraction and you can also check one

point 1 here 1 point 1 5 4 7 and here if

your grid is not according to your

conditions you can also go to edit in

the attic great story data here you can

also modify the grids

so here I am clicking close now I am

going to define material properties

material there is already define 50

grade steel you can check the street

strength that is 344 mega Pascal okay

for section there are many sections here

we'll just use steel section whatsoever

because we will just use for the

analyzing purpose here 31 watchtower ok

now I am going to draw nearest members

from here there are members perform here

I will select any steel section for

example W 250 and start crying and these

dress members let's see first of all

these members from this this

okay I am cooking escape where you can

also click right click

now it's just looking like that

overdressed now I am putting the

boundary conditions on the right side

there is a roller spot and on the left

side there is a hinge sport so I do I

would remove these extra sports click

join these joints I am going to assign

joint restraints so there are three

options fixed sport in sport roller

sport and no sport here I click apply

so now their sports are removed I am I

going to click here there is a roller

sport apply and there is a hint there is

already hinge click apply that will

replace ok now I will apply the loads on

this joint and this joint is reka newton

and on the vertical there is a Tokra

Newton so in the assumptions we have

taken that the self weight will be

ignored so that's why I am deleting the

tert load yes and I will consider only

type load so now I click this joint in

this joint and assign a joint load that

of force in the downward Direction minus

3 kilo Newton okay you can see now I

will click this join and apply - to

clone Newton load downward apply to okay

Newton 3 kilo Newton taken a Newton here

now now this okay I do not know whether

these are the be members column members

or the trust members to make these all

members the cross members we have to

ignore the moments edge joints for that

purpose we have to make the members axle

members so I am clicking all the members

here you can select all the members here

I have selected all the members I'm

going to assign frame release or partial

fixity here I am will is in the moment

apply now this all the members are

acting as Excel members now I have

assigned the loading condition sport

conditions and the members now I will

run the analysis before running the

analysis I will save my model here

problem sorry example 3.2 save after

saving the modern model I would run the

analysis here you can see though now you

can also see the deflections due to live

load at any point here it's the vertical

point 3 1 4 millimeter downward ok you

can also check the what are the units of

the displacement so the units both

displacements here if you are not sewing

and then click here here lengths units

are in millimeter so all you not sign

millimeter okay now I want to see the

reactions I will go into the display

sports ping reactions here I will click

all these apply in the tabulated form or

in whatsoever here in the left side that

is the 4 kilo Newton and the right side

it's a 4 kilonewton if x is 0 so what

are the air that is exactly matching our

the tactical problem so now we will

check the the forces in the members so

in this offer in f gb f jb h3 kilonewton

compression where is f gb f jb 3

kilonewton compression so now we will

see the forces in each member

I am closing it display display forces

here click click on axial force I am

going to apply here no you can see that

is the -3 kilonewton compression right

click here - three point zero zero seven

kilonewton compression now we can see

the forces in each members here in the

vertical - 4 in all the bottom members

are in tension so that's how you can

model any trust of unlimited number of

members of unlimited number of joints in

a tabs and you can analyze with more

accuracy and with more appropriate

method so that's all we have verified so

now we can also check one more member

for example FBF 1.73 kilonewton tension

FB f f b f this is a member one point

seven three this is a member here one

point seven three tension so that

verifying our practical results so

that's all thank you

For more infomation >> Truss Analysis with CSI ETABS Software - Duration: 14:16.

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Meet Samuel | C++ Software Design Engineer at ASML - Duration: 0:31.

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For more infomation >> Meet Samuel | C++ Software Design Engineer at ASML - Duration: 0:31.

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Person Centred Software and Samsung improve the lives of people in care - Duration: 1:31.

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For more infomation >> Person Centred Software and Samsung improve the lives of people in care - Duration: 1:31.

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Hosted vs. Non-Hosted Software Solutions - Duration: 1:23.

- What's the difference between hosted

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Seems like every system you look at these days

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For more infomation >> Hosted vs. Non-Hosted Software Solutions - Duration: 1:23.

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Should You Use Customer Service Software - Duration: 2:11.

- How do you know when you should start using

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For more tips, visit thesavvybusinessmethod.com,

download the Savvy Business Method podcast,

or check us out on Facebook and YouTube.