shape and structure in conceptual design of bridges

12
"#$%& $'( )*+,-*,+& .' -/'-&%*,$0 (&).1' /2 3+.(1&) Palmisano, F. Department of Civil Engineering and Architecture Sciences, Politecnico di Bari, Via E. Orabona, 4, 70125 – Bari, Italy Studio Vitone & Associati, Via Dalmazia, 207 – 70121 Bari, Italy Vitone, A. Department of Civil and Environmental Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 – Bari, Italy Studio Vitone & Associati, Via Dalmazia, 207 – 70121 Bari, Italy Vitone, C. Department of Civil and Environmental Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 – Bari, Italy Mininni, V.A. Consultant Engineer, Via S. Allende, 2a, 70010 – Valenzano (Bari), Italy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ig. 1. M#& B#,8$' 8/(&0C /2 *#& G/+*# H$.06$7 @+.(1& 8$(& 37 ".+ @&'A$8.' @$9&+: N/6$($7)< $ 8/(&0 #$) */ )#/6 #/6 )#$%&< )*+,-*,+& $'( &'5.+/'8&'* 3&-/8& .'*&1+$*&( .' %&+2&-* #$+8/'7: ; 8/(&0 )#/,0( '/* 3& /'07 $ 8&*#/( */ ,'(&+)*$'( )*+,-*,+$0 3&#$5./,+< 3,* $0)/ $ -0&$+ $'( &22&-*.5& .')*+,8&'* /2 .'5&)*.1$*./' $'( A,(1&8&'*: ;* %+&)&'*< )&%$+$*./' 3&*6&&' $+-#.*&-*) $'( &'1.'&&+) .) 3&-/8.'1 6.(&+ $'( 6.(&+ &)%&-.$007 .' 3+.(1&) (&).1' DEF: O//%&+$*./' 3&*6&&' $+-#.*&-*) $'( &'1.'&&+) .) a question of individuals and the chemistry between them $) ".+ N/+8$' G/)*&+ )$7) DPF? 3,* '/* /'07: Q$30/ Q.-$))/ ,)&( */ )$7 DRF *#$* *#& 3&)* 3+.(1& .) *#& /'& which could be reduced to a thread, a line, without anything left over; which fulfilled strictly its function of uniting two separated distances: @+.(1&) )#/,0( 3& 0.1#*< *+$')%$+&'*: M#&.+ 3&$,*7< .' 1&'&+$0< )#/,0( -/8& 2+/8 *#&.+ &-/'/8.- )*+,-*,+$0 )#$%&S .' 1&/8&*+.-$0 -/'*/,+) /2 3+.(1&)< 8$73& 8/+& *#$' .' /*#&+ $+-#.*&-*,+$0 6/+9)< .* .) %/)).30& */ +&-/1'.)& *#& &T%+&))./'< $08/)* &T-0,).5&< /2 )*+,-*,+$0 2,'-*./'$0.*7: 4/+& *#$' .' /*#&+ -.5.0 &'1.'&&+.'1 6/+9)< 0/$(

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Shape and structures of suspended bridges exempled by Load Path Method.

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Page 1: Shape and Structure in Conceptual Design of Bridges

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"#$%&!$'(!)*+,-*,+&!.'!-/'-&%*,$0!(&).1'!/2!3+.(1&)!!!Palmisano, F. Department of Civil Engineering and Architecture Sciences, Politecnico di Bari, Via E. Orabona, 4, 70125 – Bari, Italy Studio Vitone & Associati, Via Dalmazia, 207 – 70121 Bari, Italy !Vitone, A. Department of Civil and Environmental Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 – Bari, Italy Studio Vitone & Associati, Via Dalmazia, 207 – 70121 Bari, Italy !Vitone, C. Department of Civil and Environmental Engineering, Politecnico di Bari, Via E. Orabona, 4, 70125 – Bari, Italy !Mininni, V.A. Consultant Engineer, Via S. Allende, 2a, 70010 – Valenzano (Bari), Italy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

!!Fig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a question of individuals and the chemistry between them!$)!".+!N/+8$'!G/)*&+!)$7)! DPF?!3,*!'/*!/'07:!Q$30/!Q.-$))/!,)&(! */!)$7! DRF! *#$*! *#&!3&)*!3+.(1&! .)! *#&!/'&!which could be reduced to a thread, a line, without anything left over; which fulfilled strictly its function of uniting two separated distances:! @+.(1&)!)#/,0(!3&!0.1#*<!*+$')%$+&'*:!M#&.+!3&$,*7<!.'!1&'&+$0<!)#/,0(!-/8&!2+/8!*#&.+!&-/'/8.-!)*+,-*,+$0!)#$%&S!.'!1&/8&*+.-$0!-/'*/,+)!/2!3+.(1&)<!8$73&!8/+&!*#$'!.'!/*#&+!$+-#.*&-*,+$0!6/+9)<!.*!.)!%/)).30&!*/!+&-/1'.)&!*#&!&T%+&))./'<! $08/)*! &T-0,).5&<! /2! )*+,-*,+$0! 2,'-*./'$0.*7:! 4/+&! *#$'! .'! /*#&+! -.5.0! &'1.'&&+.'1! 6/+9)<! 0/$(!

Page 2: Shape and Structure in Conceptual Design of Bridges

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!REFERENCES E:! a,%+o!I:!Bridges: a history of the world’s most famous and important spans:!@0$-9!a/1!n!U&5&'*#$0<!

N&6!h/+9<!EZZf:!P:! >+&&8$'! ;:! BM#&! 4.00$,p)! *$0&CS! $'! .'*&+5.&6! 6.*#! U/+(! G/)*&+<! 2.+)*! %,30.)#&(! .'! a&-&83&+! P]]V:!

Structural Concrete<!M#/8$)!M&02/+(<!U/'(/'<!P]]W?XKPLS`P[`R:!R:! "*+$)97!I:!Stress ribbon and cable-supported pedestrian bridges:!M#/8$)!M&02/+(<!U/'(/'<!P]]W:!V:! "-#0$.-#!I<!"-#$2&+!q:!a&).1'.'1!$'(!(&*$.0.'1!,).'1!"*+,*[$'([*.&!4/(&0):!Proc. of the Workshop Strut-

and-Tie Models for the Design of Structural Concrete<! &(:! q:! "#$2&+<! EZZX<! N$*./'$0! O#&'1! q,'1!i'.5&+).*7<!M$.'$':!

W:! Y,+/%&$'! O/88.**&&! 2/+! "*$'($+(.\$*./'! KOYNL:! EN 1992-1-1:2004 Eurocode 2. Design of concrete structures. General rules and rules for buildings:!

X:! c.*/'&! ;<! c.*/'&! c:! b0! -$'*.&+&S! %+/1&**$+&! &! -/)*+,.+&:! U/! )*$(./! "$'! N.-/0$! (.! @$+.:!Costruire con il cemento armato<!&(:!4:!4&\\.'$<!i*&*<!M/+.'/<!P]]ESVPf[W]R:!

f:! Q$08.)$'/!G:!Up/+1$'.)8/!%/+*$'*&!.'!-:$:!&(!.!%$+*.-/0$+.!&)&-,*.5.!(.!,'!&(.2.-./!+&).(&'\.$0&:!Costruire con il cemento armato<!&(:!4:!4&\\.'$<!i*&*<!M/+.'/<!P]]ESW]f[WRE:!

`:! Q$08.)$'/!G<!c.*/'&!;<!c.*/'&!O:!G/+8!n!"*+,-*,+&:!M#&!H/8&!;,(.*/+.,8S! 0/$(!%$*#!8&*#/(! KUQ4L:!D’Architettura<!G&(&+.-/!4/**$!Y(.*/+&<!4.0$'/<!P]]P?E`S!EX`[EfR:!

Z:! Q$08.)$'/! G<! c.*/'&! ;<! c.*/'&! O:! G+/8! 0/$(! %$*#! 8&*#/(! */! -0$)).-$0! 8/(&0)! /2! )*+,-*,+$0! $'$07).):!System-based Vision for Strategic and Creative Design (Proc. of the ISEC-02 - International Structural Engineering and Construction Conference, Rome, 23-26 September 2003)<! &(:! G:! @/'*&8%.<! ;:;:!@$09&8$!Q,30.)#&+)<!*#&!N&*#&+0$'()<!P]]R?ESW`Z[WZX:!

E]:!a&!M/88$).!><!4/'$-/!Q<!c.*/'&!O:!;!2.+)*!$%%+/$-#!*/! 0/$(!%$*#!8&*#/(!/'!*#&!8$)/'+7!)*+,-*,+&)!3&#$5./,+:!Structural Studies, Repairs and Maintenance of Heritage Architecture VIII< &(:!O:!;:!@+&33.$<!<!JbM%+&))<!"/,*#$8%*/'<!i'.*&(!q.'1(/8<!P]]RSP`f[PZX:!

EE:!@$10.5.! NU<! Q$08.)$'/! G<! c.*/'&! ;<! c.*/'&! O:! U/$(! %$*#! 8&*#/(! .'! *#&! -/'-&%*,$0! (&).1'! /2! +:-:!)*+,-*,+&):!Proc. of the 2nd Specialty Conference on the Conceptual Approach to Structural Design<!]E[]P!A,07!P]]R<!4.0$'/:!

EP:!Q$08.)$'/! G<! c.*/'&! ;<! c.*/'&! O:! U/$(! %$*#! 8&*#/(! .'! *#&! .'*&+%+&*$*./'! /2! *#&! 8$)/'+7! 5$,0*)!3&#$5./,+:!Structural Studies, Repairs and Maintenance of Heritage Architecture IX<!&(:!O:;:!@+&33.$!n!;:!M/+%.$'/<!JbM%+&))<!"/,*#$8%*/'<!i'.*&(!q.'1(/8<!P]]WSEWW[EXf:!

ER:!Q$08.)$'/!G:!G/+8!$'(!)*+,-*,+&!.'!*#&!#$+8/'./,)!-/8%0&T.*7!/2!*#&!3,.0(.'1!%+/-&))S!2+/8!-/'-&%*,$0!(&).1'! */! (&*$.0.'1! .'! )/8&! +&.'2/+-&(! -/'-+&*&!6/+9):!Structural Concrete<! M#/8$)! M&02/+(<! U/'(/'<!P]]W?XKRLSEPP[ER]:!

EV:!M+/7$'/!UG:!Bridge engineering. A global perspective:!M#/8$)!M&02/+(<!U/'(/'<!P]]R:!EW:!J$0*#&+!H<!_/,+.&*!@<!b)0&+!J<!4/r$!Q<!q0&.'!IG:!Cable stayed bridges:!M#/8$)!M&02/+(<!U/'(/'<!EZZZ:!EX:! 2.3:!Guidance for good bridge design:!Bulletin 9."%+.'*[a+,-9<!"*,**1$+*<!P]]]:!Ef:!M\/'.)!;:!Santiago Calatrava: Complete Works:!H.\\/0.<!4.0$'/<!P]]V:!E`:! 2.3:!Structural Concrete Textbook on Behaviour, Design and Performance. Volume 3. Bulletin 3."%+.'*[

a+,-9<!"*,**1$+*<!EZZZ:!!