PROJECT:TR-4LOCATION:STA. 57+839NAME OF STRUCTURE:OVERPASS OP4DESIGN OF APPROACH SLAB S!E"ED 55.#8$Filename: Approach SlabAbutment Approach Slab (OP4)I%&'( D)()a. Dimensions 3654Lenth o! approach slab L " 3654 mmApproach slab thic#ness " 3$$ mm%!!ecti&e span lenth S " '(54 mmSb. )aterial *ata+oncrete comp. strenth " ', )PaSteel -iel* strenth " 4.4 )PaDensit- o! concrete " '4c. Desin *ataStrenth re*uction !actor " $./$ Diameter o! main bar " '$ mm0atio " $.,5 %!!ecti&e *epth * " '4$ mm+lear concrete co&er " 5$ mm 1i*th o! member b " .$$$ mmL*)+ A%),-./.a. Distribution 2i*th (main rein!orcement parallel to tra!!ic)% ..'./ 3 $.$6 S 4 '..$$ m " ..3,4 mb. Dea* loa* (consi*er ..$ m strip)Slab " $.3$$ 5 '4 " (.'$$ #67m8otal *ea* loa* " (.'$$ #67mc. Li&e loa*9mpact !actor 9 " .5.'4 7 S 3 ::: " $.3,( use 9 " $.3$1heel loa* (;S '$)DL)LL39)>!r!c= !r9

b ts3 7 .' 9

m4-tts 7 ' -t)cr!r 9

7 -t)cr..')cr)inimum steel ratio = . < . < " $.$$',3?alance* steel ratio = = $.$',/.)a5imum steel ratio = = $.$'.6/b. ?ottom rein!orcement (main lonitu*inal rein!orcement)+oe!!icient o! resistance " " '.6$, )PaSteel rein!orcement ratio " . < . < " $.$$66/0e@uire* steel area " " .6$5.5Area o! main bar " " 3.4.'Spacin o! bars " " ./5.6, mm78 9*((*2 9)4. .&)60+ ) #58 22 60%(04 (* 60%(04 ( " '$/4.4 )c. Distribution rein!orcementDistribution 0ein!orcement shall be place* trans&erse to the main steel rein!orcement in the bottom o! allslabs to pro&i*e !or the lateral *istribution o! concentrate* li&e loa*s.For main rein!orcement parallel to tra!!icAB *istribution [ 5$ BB *istribution " ::: 7 S " 33.. B use B *istribution " 33.. BArea o! *istribution bars " " 6/4..SiCe o! *istribution rebar " .6 mmArea o! one bar " '$...Spacin o! rebars " " '/$ mm#: +/.(4/9'(/*% 9)4. .&)60+ )( #58 22 60%(04 (* 60%(04*. 8emperature an* shrin#ae rein!orcementSiCe o! 87S rebar " .' mmArea o! one bar " ..3.." '64.6Spacin o! rebars " " 4'( mm#7 (02&04)('40 )%+ .;4/%