ACES PSC Design Module V{VERSION}: Run date: {DATE}
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Heading: {PROJECT}
Job Name: {JOBNAME}
Designer: {DESIGNER}
Comments: {COMMENT1}
Units: mm, kN, kN.m, MPa
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DESIGN CODE: {CODE} {DEC 0}
SERVICEABILITY CHECK {DEC 0}
| Area of girder (Ag) |
= |
{Ag} |
mm^2 | ||
| Eccentricity of CG strands from CG girder (e) |
= |
{e} |
mm {EXP 4} | ||
| Section modulus of girder - top (Zt) |
= |
{Zt} |
mm^3 | ||
| Section modulus of girder - bottom (Zb) |
= |
{Zb} |
mm^3 | ||
| Section modulus of composite girder - slab top (Zst) |
= |
{Zst} |
mm^3 | ||
| Section modulus of composite girder - slab bot (Zsb) |
= |
{Zsb} |
mm^3 | ||
| Section modulus of composite girder - girder top (Zgt) |
= |
{Zgt} |
mm^3 | ||
| Section modulus of composite girder - girder bot (Zgb) |
= |
{Zgb} |
mm^3 {DEC 0} | ||
| Prestress force at transfer (Pt) |
= |
{Pt} |
kN | ||
| Moment due to PS force at transfer (Mpte = - Pt*e/1000) |
= |
{Mpte} |
kN.m | ||
| Moment due to self-weight of girder (Msw) |
= |
{Msw} |
kN.m | ||
| Girder stresses at transfer: (Tension = +ve) | {DEC 2} | ||||
| Stress at top of girder due to PS force (= -Pt*1000/Ag) |
= |
{fgt1} |
MPa (= stress at bottom of girder) | ||
| Stress at top of girder due to PS eccentricity (-Mpte*E6/Zt) |
= |
{fgt2} |
MPa | ||
| Stress at bot of girder due to PS eccentricity (Mpte*E6/Zb) |
= |
{fgb2} |
MPa | ||
| Stress at top of girder due to girder selfwt (-Msw*E6/Zt) |
= |
{fgt3} |
MPa | ||
| Stress at bot of girder due to girder selfwt (Msw*E6/Zb) |
= |
{fgb3} |
MPa | ||
| Stress at top of girder at transfer (= fgt1+fgt2+fgt3) |
= |
{fgt4} |
MPa | ||
| Stress at bot of girder at transfer (= fgb1+fgb2+fgb3) |
= |
{fgb4} |
MPa {DEC 0} | ||
| Final design stresses: (Tension = +ve) | |||||
| Final design prestress force (P) |
= |
{P} |
kN {DEC 2} | ||
| Superimposed dead load factor (SDLf) |
= |
{SDLf} |
(AS5100.2 Clause 5.3) | ||
| Axial stress at top girder due to PS force (- P*1000/Ag) |
= |
{fgtss1} |
MPa | ||
| Axial stress at bot girder due to PS force (= top stress) |
= |
{fgbss1} |
MPa {DEC 0} | ||
| Moment due to eccentricity of PS force (Mpe = -P*e/1000) |
= |
{Mpe} |
kN.m {DEC 2} | ||
| Basis of stress calculations: | |||||
| Stresses due to prestress, self-weight and superimposed dead loads are calculated using girder moduli Zt and Zb viz: | |||||
| fgt = -M*10^6/Zt and fgb = M*10^6/Zb where M represents the relevant moment | |||||
| Stresses due to hotmix, live load and special vehicle loads are calculated using girder moduli of the composite section viz: | |||||
| fst = -M*10^6/Zst; fsb = -M*10^6/Zsb; fgt = -M*10^6/Zgt; fgb = M*10^6/Zgb | |||||
| For the case of superimposed dead loads (bitumen/hotmix) the stresses are multiplied by the factor SDLf. | |||||
| Shrinkage stresses are obtained from the 'Loadings' tab (fts, fbs, ftg, fbg) | |||||
| Summary of final stresses | |||||
|
Loading |
Value (kN,kN.m) |
Slab Top (MPa) |
Slab Bottom (MPa) |
Girder Top (MPa) |
Girder Bottom (MPa) |
|
|
1 |
Final prestress force |
{P} |
{fgtss1} |
{fgbss1} |
||
|
2 |
Prestress eccentricity (Mpe) |
{Mpe} |
{fgtss2} |
{fgbss2} |
||
|
3 |
Girder self-weight (Msw) |
{Msw} |
{fgtss3} |
{fgbss3} |
||
|
4 |
Insitu deck slab (Mslab) |
{Mslab} |
{fgtss4} |
{fgbss4} |
||
|
5 |
Hotmix/bitumen (Msdl) |
{Msdl} |
{fstss5)} |
{fsbss5} |
{fgtss5} |
{fgbss5} |
|
6 |
Differential shrinkage (Mshr) |
{Mshr} |
{fstss6} |
{fsbss6} |
{fgtss6} |
{fgbss6} |
|
7 |
Design live load (Mll) |
{Mll} |
{fstss7} |
{fsbss7} |
{fgtss7} |
{fgbss7} |
|
8 |
Special vehicle (Mhvl) |
{Mhvl} |
{fstss8} |
{fsbss8} |
{fgtss8} |
{fgbss8} |
| Total stress: DL+Design Live Load |
{fstll} |
{fsbll} |
{fgtll} |
{fgbll} |
||
| Total stress: DL+Special Vehicle Load |
{fstsv} |
{fsbsv} |
{fgtsv} |
{fgbsv} |
||
| Tension = (+)ve Compression = (-)ve |
| Allowable concrete tension stress (f'at) |
= |
{f'at} |
MPa ({CODE} Clause 8.6.2) | ||
| Allowable concrete compression stress (f'ac) |
= |
-{f'ac} |
MPa ({CODE} Clause 8.1.4.2) |