同济大学：《高层建筑结构》课程教学资源（参考资料）Tour First

Tour First Ghislain FARRADECHE 1159210 Introduction This report will introduce key informations about the Tour First in the central business district 'La Defense'which is in the direct suburb of Paris.I choose this tower because it is the tallest in France and I appreciate the fact Paris choose not to build skyscrapers in the city center.Contrary to Lyon(2nd french city),my home town.I Important figures 231 m high 52 Stories The tower was built in 1974 and was 150m,the renovated in 2011.It is now 231m lasted 4 years.It became the tallest skyscraper in France. Structure The tower is made of a reinforced concrete and the renovated added three wings which represent the three insurances that occupy the building.The core is made of reinforced concrete.Then,the core had to be reinforced to support the ten new stories.The three wings were renovated higher,and slopes were added to the three roofs.It is covered by two layers of hemmh gaz and lift are located in the core. Tour AXA Tour AXA(nouveau) Tour First Ghislain FARRADECHE 1159210 1/3

Tour!First Ghislain!FARRADECHE!1159210 1/3 Tour!First Ghislain!FARRADECHE 1159210 Introduction This! report! will!introduce! key!informations! about! the! Tour! First!in! the! central! business!district!'La!Défense'!which!is!in!the!direct!suburb!of!Paris.!I!choose!this!tower! because! it! is! the! tallest! in! France! and! I! appreciate! the! fact! Paris! choose! not! to! build! skyscrapers!in!the!city!center.!Contrary!to!Lyon!(2nd!french!city),!my!home!town.!I Important!figures: 231!m!high 52!Stories The! tower!!was!built!in!1974!and!was!150m,! the!! renovated!!in!2011.! It!is!now!231m! high!and!the!construcution lasted!4!years.!It!became!the!tallest!skyscraper!in!France. 320!million!euros Structure! The! tower! is! made! of! a! reinforced! concrete! ! and! the! renovated! added! three! wings! which!represent!the!three!insurances!that!occupy! the! building.! The! core! is! made! of! reinforced! concrete.! Then,! the! core! had! to! be! reinforced! to! support! the! ten! new! stories.! The! three! wings! were!renovated!higher,!and!slopes!were!added!to! the! three! roofs.! ! It! is! covered! by! two! layers! of! glass!which!create!a!double!skin!on!the!building. The!structure!is!a!concrete!frame.!The!electricity,! gaz!and!lift!are!located!in!the!core

Refurbishment and Sustainable developpement Construction The refurbisment of the tower allowed to save a lot of materials,as 80%of the former reinforced concrete structure kept.It gave a second life to the strucutre.50%of the waste during the renovation were recycled! For the renovation,the asbestos from the previous structure had to be completly removed and the tower confined. Power consumption The Tower FIrst will spr and the ple,it will be the norn rain falls o some lights will be turned on where a drops fall.These lights are LEDs and only consume 8.75kW. In order to minimize the consumption,the three facades play a great role.They are cov red differently,acc to their exposure.That's why the south wing is more protected against sun, whereas the north wing is fully covered by glass. Calculation of the shadows spread the wings one another and the buildings in the neighbourhood, helped to the forecast of consumption. In addition,the facades have a double skin. The double skin is a second layer of glass all over the building,which permit air circulation between the two layers to naturally cool the building down. The heat suffered by the big surfaces are decreased thanks to 6800 automatic awnings. Thanks to all these measures,the Tour First is the most eco-friendly skys crape in France.That is why it followes the normes'High Environnemental Quality'with only 100kW/m2/year. Tour First Ghislain FARRADECHE 1159210 2/3

Tour!First Ghislain!FARRADECHE!1159210 2/3 Refurbishment!and!Sustainable!developpement Construction The! refurbisment! of! the! tower! allowed! to! save! a! lot! of! materials,! as! 80%! of! the! former! reinforced!concrete!structure!kept.! It!gave!a!second! life! to! the! strucutre.! 50%! of! the! waste! during! the! renovation!were!recycled! For! the! renovation,! the! asbestos! from! the! previous!structure!had!to!be!completly!removed!and! the!tower!confined.! Power!consumption The!Tower!FIrst!will!spread!the!weather!forecast.!It's!color!changes!with!the!time! and! the!weather.! For! example,!it!will! be! orange!in! the!morning.!When! rain! falls! on!it,! some! lights! will! be! turned! on! where! a! drops! fall.! These! lights! are! LEDs! and! only! consume!8,75kW. In!order! to!minimize! the!consumption,! the! three! facades! play!a!great! role.! They!are! covered! differently,! according! to! their! exposure.! That's! why!the!south!wing!is!more!protected!against!sun,! whereas! the! north!wing!is! fully! covered! by!glass.! Calculation! of! the! shadows! spread! the!wings! one! another! and! the! buildings! in! the! neighbourhood,! helped!to!the!forecast!of!consumption.! In!addition,!the!facades!have!a!double!skin.! The!double!skin!is!a!second!layer!of!glass!all!over! the!building,!which!permit!air!circulation!between! the!two!layers!to!naturally!cool!the!building!down. The! heat! suffered! by! the! big! surfaces! are! decreased! thanks! to! 6800! automatic! awnings. Thanks!to!all!these!measures,!the!Tour!First!is!the!most!eco\friendly!skyscraper! in!France.!That!is!why!it!followes!the!normes!'High!Environnemental!Quality'!with!only! 100kW/m2/year

Conclusion The tour First is the tallest and the most ecofriendly tall structure in France.It was made possible by important studies which put sustainable developpment in the center of the thoughts.The solution taken,were to renovate an old tower and add new technologies inside.I hope this tower will inspire other engineers France and maybe abroad References cogedim.com/Inauguratic iy/mwmwanethdhom/45i87/ornkistkoinrpetetnixasocateskpfpas http://www.pss .eu/lorum/v Tour First Ghislain FARRADECHE 1159210 3/3

Tour!First Ghislain!FARRADECHE!1159210 3/3 Conclusion The! tour! First!is! the! tallest!and! the!most!ecofriendly! tall! structure!in! France.! It! was! made! possible! by! important! studies! which! put! sustainable! developpment! in! the! center!of!the!thoughts.!The!solution!taken,!were!to!renovate!an!old!tower!and!add!new! technologies! inside.! I! hope! this! tower! will! inspire! other! engineers! France! and! maybe! abroad. References http://www.altareacogedim.com/La\tour\First\plus\grand\chantier.html http://www.altareacogedim.com/Inauguration\de\la\Tour\First\a\La,20781.html http://www.pss\archi.eu/forum/viewtopic.php?id=28246&p=56 http://www.archdaily.com/145187/tour\first\kohn\pedersen\fox\associates\kpf/plans\ 61/