Projektiranje integralnega cestnega nadvoza

diplomska naloga

Uroš Sebastjan Belak (Avtor), Jože Lopatič (Mentor), Janko Logar (Član komisije za zagovor), Mitja Košir (Član komisije za zagovor), Živa Kristl (Član komisije za zagovor)

Povzetek

Ključne besede

gradbeništvo;diplomska dela;UNI;integralni betonski most;dimenzioniranje;vplivi na konstrukcijo;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2013
Izvor:	Ljubljana
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL FGG - Fakulteta za gradbeništvo in geodezijo
Založnik:	[U. S. Belak]
UDK:	519.61/.64:624.071.3:625.745.1(043.2)
COBISS:	6301793
Št. ogledov:	2132
Št. prenosov:	389
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Design of the integral concrete bridge
Sekundarni povzetek:	The first part of the thesis describes in general the many different types of bridge constructions with emphasis on integral concrete bridge constructions. The main characteristic of the latter is a rigid link between superstructure, intermediate piers and abutments at the end of superstructure. These concrete bridges therefore have no expansion joints and bearings at the end of superstructure, which would otherwise render them very expensive. Consequently the post-construction maintenance cost is significantly lower, since there is no need to replace frayed expansion joints, the usual high maintenance cost at conventional bridges. The current global economic state calls for radical low cost solutions and for these reasons the integral concrete bridges make a very interesting choice. In the second part of the thesis an integral concrete bridge is designed. Separate models for global and local analysis of the structure are made. Local analysis is used to design the overhang of the bridge deck. The model I have created with the Sofistik computer program is made of surface elements. In global analysis structure elements like the bridge deck and piers are dimensioned. The model is made of linear beams as a 3D frame. The foundation ground rigidity has an extremely high influence on internal forces of the structure, therefore I model the soil behavior in global analysis with springs, attached to the piers. The results of internal forces are calculated with linear-elastic analysis and deformations with nonlinear static analysis. The modal analysis results have proven to be insignificant for the most part, except in the case of horizontal shift of the bridge deck. At the end of the thesis reinforced cross-sections in selected nodes are shown for the bridge deck and pier. The main purpose of the thesis is to demonstrate the possibility of designing the fore mentioned bridge as an integral concrete bridge construction, instead of semi-integral bridge construction. The actual construction is in fact being designed as semi-integral bridge construction. What I also found interesting in the thesis is comparison between design reinforcements results calculated with the Sofistik computer program and calculations made by following the eurocode guidelines.
Sekundarne ključne besede:	graduation thesis;civil engineering;integral concrete bridge;design of elements;actions on bridges;
Vrsta datoteke:	application/pdf
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Strani:	XVI, 144 str.
Vrsta dela (ePrints):	thesis
Naslov (ePrints):	Design of the integral concrete bridge
Ključne besede (ePrints):	integralni betonski most;dimenzioniranje;vplivi na konstrukcijo
Ključne besede (ePrints, sekundarni jezik):	integral concrete bridge;design of elements;actions on bridges
Povzetek (ePrints):	V prvem delu diplomske naloge opišem različne tipe mostnih konstrukcij s poudarkom na integralnih mostnih konstrukcijah. Glavna značilnost slednjih je ta, da imajo togo povezavo med prekladno konstrukcijo in vmesnimi stebri ter krajnimi oporniki. To so torej betonski mostovi z okvirnim nosilnim sistemom brez dragih ležišč in dilatacij. Posledično so tudi stroški vzdrževanja bistveno nižji, saj je ravno menjava dotrajanih ležišč in dilatacij zelo drag poseg. Ker je pa ravno denar tisti, ki v današnjih časih igra pomembno vlogo, so take integralne mostne konstrukcije z ekonomičnega vidika zelo zanimive. V nadaljevanju diplomske naloge projektiram integralno mostno konstrukcijo temeljeno na pilotih. Naredim ločena modela za globalno in lokalno analizo. Pri lokalni analizi obravnavam le dimenzioniranje konzolnega dela prekladne konstrukcije. Model, ki ga naredim v programu Sofistik, je iz ploskovnih elementov. V okviru globalne analize naredim deloma izvedeno dimenzioniranje, pri čemer dimenzioniram prekladno konstrukcijo ter izbrani steber. Model v programu Sofistik je sestavljen iz linijskih elementov povezanih v prostorsko konstrukcijo. Izredno velik vpliv na obremenitve ima togost temeljnih tal, zato zemljino v globalni analizi modeliram z vzmetmi, ki so povezane s piloti. Obremenitve v konstrukciji določim z linearno elastično analizo, pomike pa z nelinearno analizo. Za rezultate dinamične analize za potresno projektno stanje se je v večji meri izkazalo, da niso merodajni, razen v primeru horizontalnega pomika krajnega opornika. Na koncu prikažem tudi shemo potrebne armature v najbolj obremenjenem prečnem prerezu stebra in prekladne konstrukcije. Glavni namen diplomske naloge je ugotoviti, ali bi se omenjeni nadvoz lahko projektiral kot integralna mostna konstrukcija. Dejanska konstrukcija se namreč projektira kot kvazi integralna mostna konstrukcija. Zanimiva pa je tudi primerjava rezultatov potrebne količine armature iz programa Sofistik s kontrolnimi izračuni, ki jih izvedem ročno po navodilih standarda.
Povzetek (ePrints, sekundarni jezik):	The first part of the thesis describes in general the many different types of bridge constructions with emphasis on integral concrete bridge constructions. The main characteristic of the latter is a rigid link between superstructure, intermediate piers and abutments at the end of superstructure. These concrete bridges therefore have no expansion joints and bearings at the end of superstructure, which would otherwise render them very expensive. Consequently the post-construction maintenance cost is significantly lower, since there is no need to replace frayed expansion joints, the usual high maintenance cost at conventional bridges. The current global economic state calls for radical low cost solutions and for these reasons the integral concrete bridges make a very interesting choice. In the second part of the thesis an integral concrete bridge is designed. Separate models for global and local analysis of the structure are made. Local analysis is used to design the overhang of the bridge deck. The model I have created with the Sofistik computer program is made of surface elements. In global analysis structure elements like the bridge deck and piers are dimensioned. The model is made of linear beams as a 3D frame. The foundation ground rigidity has an extremely high influence on internal forces of the structure, therefore I model the soil behavior in global analysis with springs, attached to the piers. The results of internal forces are calculated with linear-elastic analysis and deformations with nonlinear static analysis. The modal analysis results have proven to be insignificant for the most part, except in the case of horizontal shift of the bridge deck. At the end of the thesis reinforced cross-sections in selected nodes are shown for the bridge deck and pier. The main purpose of the thesis is to demonstrate the possibility of designing the fore mentioned bridge as an integral concrete bridge construction, instead of semi-integral bridge construction. The actual construction is in fact being designed as semi-integral bridge construction. What I also found interesting in the thesis is comparison between design reinforcements results calculated with the Sofistik computer program and calculations made by following the eurocode guidelines.
Ključne besede (ePrints, sekundarni jezik):	integral concrete bridge;design of elements;actions on bridges
ID:	8312812