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Exam Solution AE1130 7 November 2013

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  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Space

    above not to be

    f i l l e di n

    by the student

    iii3()II EngooiearDQigIMlacteDiiiics^

    Sttattao

    1

    K l o w e G n n l b e r 2 i ;

    M o

    1.

    Las l t m iame

    a o id

    BoiiDitDaD^

    > O D n D D n n a a D D D P n D D n D D D D D O D D D D D O D D D I

    Only Ihainidl O

    the

    a nswer sh ee t s

    Other sheets will

    not

    be accepted

    lame a nd s t u d y

    n y m b e r on

    ev ery page

    Sheets without name

    or

    study number will

    not

    be accepted.

    Wr i te re levan t ca l cu la t i ons

    on the

    ans we r shee t

    Use the blank sides

    of

    the answer sheets

    if

    necessary.

    Answers without calculations

    or

    motivation will

    not

    be taken into

    account.

    Use possible checks

    to

    avoid calculation errors

    The orderof answering the questions isfree

    NOTE: th i s ex am con s is t s of 5 p rob l em s .

    The nea tnessofthe

    p resentat ion

    of the answers

    will be considered in the ma rking.

    A l l a nsw ers mu s t

    be

    g i v e n m e n t i o n i n g

    the

    c o r r e c t

    SI

  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Answer sheets Student no :

    7 November 2013 p,

    Exam AE1 130-I: Statics Name: H o ^ Q g r n o o d g -

    F rob l em 1 WeigSit 2 .0 = approic. 35 mDnytes)

    The truss in the f igure below is loaded by a force P in A. The truss is supported by a

    rol ler support In H and a hinged support in L. Al l relevant dimensions are given in the

    figure below,

    Het vakwerk in de onderstaande figuur wordt belast door een kracht P in A. Het vakwerk

    heeft een roloplegging in H en wordt scharnierend ondersteund in L Alle relevante

    afmetingen staan in de onderstaande figuur.

    Quest ions

    - 0 -

    L

    H

    a) Determ ine the reactions in H and L and draw these In the f igu re In the d irection

    in whlch they act on the structure in real i ty.

    Bepaal de oplegreacties in H en L en teken deze in de figuur in de richting zoals

    ze in werkeH jkheid op de constructie werken.

    ^f^y - L H L H =

    O

    Xl

    _ -

    _

    -

    p.

    __ ]ri._HAi_.a ^ ^ ^

    -__2.Q l v _ ^ j ^

    =

    L y

    -V H v

    Page 2 of 16

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    Answer sheets

    Student

    no:

    7 November 2013

    Exam AE I130-1: Statics

    Name: r\3

    c J g r

    rOQc ^ e l

    (prorolem

    1contimiyec

    b) Identify the zero-force members

    in the

    structure.

    Identificeer denulstaven indeze constructie.

    c) Calculate the normal forces in members AB, AH, AJ, and CG usinga

    method ofyour choice with

    the

    correct sign

    for

    tension

    (+) or

    compression

    (-)

    and include these

    in the

    table

    on the

    next page.

    All

    results must

    be

    supported

    by

    calculations.

    Bereken de normaalkrachten

    in

    de staven

    AB,

    A H, AJ

    en

    CGmet

    een

    methode naarkeuze

    met

    het juiste teken voor trek

    +) en

    druk

    -) en

    vermeld ze

    In

    de tabe l op

    de

    volgendepagina. Alle resultaten moe ten

    met

    berekeningen worden onderbouwd.

    O Vak

    L

    .

    V

    ~~^co

    1 ^ - ^ L J

    Wxjk

    .-L....n.2[S

    Page

    3 of 16

  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Answer sheets

    Student no:

    7 November 2013

    Exam

    A E I

    130-1: Statics

    Name

    (problem

    1 cont inued )

    Q>JsJ ex =

    5 F ^ V

    : 0

    ^

    M f t H ' ^ ^

    ^

    ^ ' ' P

    - U - ^

    \6\^[

    ft--

    3

    *---- I

    NAB NAH

    NcG

    Page 4 of 16

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  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Answer sheets

    Student no:

    7 November 2013

    Exam AE I130-1:Statics

    Name: ^ n ^ L J ^ e r n ^ o g j i ^ l

    (que stion 2 contimuec )

    --....aX....... 6 .

    ^ f-

    -- - . X - \ s

    ^ f ^ i ^ ^ W

    ^^^^J^A.Q1\C> k j : . . io

    Ujo j

    J S ,

    .. ....2...

    b)

    Calculate the forces acting In mem bers S l , S2 , and S3 as a fun ction o f W.

    Bereken de krachten die in staven Sl, S2 en S3 werken als een functie vanW

    -5,

    F r g s u ^ A - a o V forc^ o n U

    Abe rope

    . 0 .

    / 3 ^

    T M

    Page 6 of 16

  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Answer sheets Student no:

    7 November 2013

    Exam AE1130-I: Statics

    Name: ftfSSU>eronod\

    [question 2 continued) ^

    - w V

    o

    o j -

    - 2 - G )

    lEf^Li_ j:. -

    h l

    L r o f o

    uy

    ;

    S

    3

    ^

    :

    : ^ I

    ? . . U 3

    3 )

    _ _ _

    y_

    - - - v - r - i - ^ - - - - v g -

    10

    Page 7 of 16

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    Answer sheets

    7 November 2013

    Exam AE I130-1: Statics

    Student no:

    Name:

    FrobDeimi3 WeSght 1.5 - a p p rox . 3 0 m i ny t e s )

    a) Consider the structure depicted be low. Which shear force diagram shown

    below is the correct one? Motivate your answer.

    Beschouw de onderstaande constructie. Welkdwarskrachtendiagram is

    correct? Mo tiveer uw antwoord.

    I kN ,

    A

    ni

    i

    4kN

    3 m

    IkN

    2kN 2kN

    b)

    IkN

    IkN

    )

    IkN

    IkN

    2kN 2kN

    c)

    1 kN

    1 _

    i

    S'

    4kN

    1 kN

    o s

    VWrc fe

    OQ

    e x l .

    ^ d .

    ^oTcai

    on

    ib

    . end..

    ^ (?pc

  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Answer sheets Student

    no:

    7 November 2013

    Exam AEI130-1:Statics Name: P > O S U ) g r n n o c i e \

    ([Problem

    3 cos i t lnyed)

    b)

    Four bending moment diagrams

    are

    drawn

    to the

    same scale

    in the

    picture below. Which

    two

    bending moment diagrams match

    the

    same

    shear force diagram? Motivate your answer.

    Viermomentendiagramm en zijn

    op

    scliaalgetekend in

    de

    onderstaande

    figgur

    WellvVK ido-^t

    l c a ^

    ^PQJSr^ ,^r\Qr\ Oz _

    \.J^^^^ea,r

    S o r c e

    dia^fa/^ ^^^

    Page

    9 of 16

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    Answer sheets

    Student no:

    7 November 2013

    Exam AE1130-I: Statics

    Name:

    (Prolbiem

    3 co t i t i n yed )

    c) Four bending moment diagrams are given for column AB (values in kN m).

    Which bending moment diagram matches the given load? Motivate your

    answer.

    Erzijn

    vier

    iriomentendiagrammen

    gegeven voor kolom AB (waardes in

    kNm) Welkmom entendiagram komt overeen met de gegeven belasting?

    Motiveer uw antwoord.

    2,5m 2,5m

    K

    m

    M

    10 kN ' ^ 10 kN

    t l \ ^

    2 m

    ( )

    _ aV

    -VViere v3

    Q resrpuQhc u\4-

    m

    Page 10 of 16

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    Answer sheets Student no:

    7 November 2013

    Exam AE1130 -I: Statics Name

    Problem 4 (Weight 2 .5 - approx. 45 m inute s)

    Consider the structure loaded as shown in the f igure below. The structure is supported

    by a hinged s upp ort in A and a cable attached to the beam in C and to th e wal l In D. Al l

    relevant information is given In the f igure below.

    Beschou w de constructie met gegeven be iasting in de onderstaande figuur. De

    constructie wordt scharnierend ondersteund in A en een l

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    Answer sheets Studen t no :

    7 November 2013

    Exam

    A E I

    130-1:Statics Name: ftoSLOecrOode^

    (problem 4 continued)

    b)

    Draw tine normal force, shear force and moment d iagrams (N- , V- and M-

    d lagram)

    ofthe

    frame and use the correct deformation signs. Indicate al l

    relevant values including al l ( local) extremes.

    Teken de normaa lkrachten-, dwarskrachten- en mom entenlijnen (N-, V- en M-

    l i jnen) voor de ligger en vermeld d aarbij de juiste vervormingstekens. Geef alle

    relevante waardes aan, inclusief alle (lokale) extreme waardes.

    I ] ^

    i ^ ^ a .

    N-diagram

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    Answer sheets

    Student no:

    7 November 2013

    Exam AE I130-1: Statics

    Name:

    B O ( jOerr rNodGi

    Frolblem

    5 (W e ig h t 2 .0

    =

    app rox . 35

    m i ou t es )

    The strength of a W350 x 57 rol led-steel I-beam Is increased by attaching a 229 mm x

    19 mm plate to i ts upper f lange as shown. Al l relevant dimensions are given in the f igure

    below.

    De sterkte van een W 360 x 57 gewa lste stalen I-balk wordt vergroot door er een plaat

    van afmetingen 229 mm x 19 mm aan de bovenste flens te bevestigen. Alle relevant

    afmetingen zijn gegeven in de onderstaande figuur.

    229mm

    _

    [_

    C

    w-7.9mm-

    t=13.1mm

    19mm

    358 mm

    172mm

    Q u e s t i o n s

    a) Calculate the mo m ent of Inert ia of the I-beam (exc lud ing the p la te ) abou t i t s

    own centroid with respect to the horizontal axis paral lel to the plate.

    Bereken het centrale hoofdtraagheidsm oment van de I-balk (zonder de plaat)

    om zijn zwaartepunt ten opzichte van de horizontale as parallel aan de plaat

    = \5,l2 ip mm**

    Page 13 of 16

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    Answer sheets

    Student no:

    7 November 2013

    Exam AE1130-I: Statics

    Name

    ( q u es t i on 5 c on t i nu ed )

    b) Calculate the location ofthe centroid C ofthe remforced cross section

    (plate plus I-beam) with respect to the bottom ofthe cross section.

    Bereken de locatie van het zwaartepun t C van de versterkte doorsnede

    (plaat plus I-balk) ten opzichte van de onderkan t van de doorsnede

    1

    oy)

    / k -

    i r a doxA i.-^

    ZS

    ^AM

    3d _y5>

    1

  • 7/24/2019 Exam Solution AE1130 7 November 2013

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    Answer sheets Student no:

    7 November 2013

    Exam

    AEI

    130-1: Statics Nam e:

    (qiuestion

    5 con tinued)

    c) Calculate the mo me nt of inert ia of the composite cross section with respect to

    the horizontal axis paral lel to the plate that passes through the centroid C ofthe

    composite cross section.

    Bereken het centrale hoofdtraagheidsmo ment van de samen gestelde doorsnede

    om de horizontale as parallei aan de plaat die door het zwaartepun t van de

    samengestelde doorsnede gaat.

    C

    -

    - - - - - -

    -^^^ - Y

    ziQ^i \ ( ^ 22^.1

    .

    _

    i i

    Page 15 of 16

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    Answer sheets

    7 November2013

    Exam AE I130-1:Statics

    Student

    no:

    Name:

    Only this sheetmaybe usedat theexam

    Area

    M o m e n t s

    of I ne r t i a

    Triangle:

    Rectangle:

    Circle:

    Thin-walled ring

    Jc

    =

    7rR''/2

    :

    ,

    .A-

    t

    h

    1

    G.

    r ;

    M J

    V

    iassM o m e n t s of I ne r t i a

    Thin

    plate

    1

    2

    1

    2

    / =mb = ma

    T h i n

    Circular disk

    2

    Page 16 of 16


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