Contents
Academic literature on the topic 'Betongbroar'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Betongbroar.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Dissertations / Theses on the topic "Betongbroar"
Ehlorsson, Viktor, and Victor Palmqvist. "Prefabricerade betongbroar - är det möjligt?" Thesis, Halmstad University, School of Business and Engineering (SET), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4494.
Full text”Prefabricerad broproduktion ger ett snabbt montage och stor möjlighet att styra produktionsprocessen”
(En av de intervjuade)
Vid traditionell produktion av betongbroar tillverkas bron på plats. Ingående arbeten såsom byggande och rivning av ställning, formsättning, armering samt gjutning av bron är tidskrävande moment som innefattar oergonomiska arbetsställningar för yrkesarbetarna, där de dessutom exponeras för ogynnsamma väderförhållanden och höga höjder. De flesta betongbroar som byggs i Sverige utförs fortfarande enligt traditionella metoder innehållande många tidskrävande och ogynnsamma arbetsmoment.
I rapporten behandlas prefabricerade betongbroar som är ett konkurrenskraftigt alternativ vid broproduktion. Broelementen tillverkas på fabrik och monteras på plats, vilket leder till tidsvinster, minskade trafikstörningar, förbättrad arbetsmiljö och bättre kvalitet. Prefabricerade betongbroar kan ses som en del av industrialiseringen av byggprocessen där standardiserade lösningar och metoder används för att effektivisera byggandet.
Intervjuer med personer verksamma inom anläggningsbranschen har gjorts för att få fram ett så relevant resultat som möjligt. Dessa gav oss en övergripande uppfattning om prefabricerade betongbroars fördelar och nackdelar samt anledningarna till det låga användandet i Sverige.
Rapporten visar att prefabricerade betongbroar är en möjlig produktionsmetod vid brobyggnad. De kvalitetsproblem som förekommit har arbetats bort, istället uppnås idag en bättre kvalitet på den färdiga bron. Beställarna måste dock värdera tidsaspekten redan i upphandlingsfasen för att prefabricerade betongbroar ska anses fördelaktiga. Dessutom måste projekteringsprocessen förändras och en ny kompetens arbetas fram inom branschen. Förändras dessa faktorer är vi helt övertygade om att prefabricerande betongbroar har en ljus framtid i Sverige.
Granqvist, Marcus. "En fallstudie gällande beräkningsmetoder av spänningsförluster i för- och efterspända betongbroar : Tillståndsbedömning av för- och efterspända betongbroar med dagens beräkningsmetoder." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-86018.
Full textAndersson, Jesper, and Joel Henegård. "En jämförelse mellan prefabricerade och platsgjutna betongbroar - Med hänsyn till arbetsmiljö och arbetsutförande." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-168085.
Full textAnyone who has ever driven a car have also been sitting in long, slow traffic jams past constructionsites. Modern construction methods used are depending on factors that can make the workplacedemanding and dangerous for those passing by and for employees at the construction site. Theadditional costs involved in the construction will ultimately affect the end consumer who is thetaxpayer.The study has examined the work performance and working environment in the production ofconcrete bridges, where prefabricated and the site-cast method is compared.Prefabrication of concrete bridges is already widely used in the rest of Europe but is barelyestablished in Sweden. The study examines whether the reason for the low use lies in the fact thatthe execution of the precast method doesn´t work in Sweden or whether the working environmentwithin the method affects the choice.When selecting work method, the goal is to make the client or contractor to choose the most fittedand relevant method. It´s essential to choose with care to ensure that work performance or theworking environment doesn´t get affected. Previous case studies on two similar reference targetscomparing each method examined the cost differences and concluded that the precast method isthe cheaper option.In order to achieve goals and objectives, the thesis was carried out with the help of literature studiesalong with a survey and interview study of people within the industry. The study is mainly focusedon the administration personnel from various companies to give a fair result between the differentmethods. The interviews of the administration gathered opinions and experiences of concretebridge construction. The surveys have been answered by construction workers where theiropinions have been of paramount importance to get an overall view of the attitude to a possiblechange. The compiled responses from interviews and surveys have been analyzed and comparedagainst relevant literature.The analysis shows that an industrialization is indeed possible within bridge constructionparticularly for bridges of shorter spans. The results show that the industry is ready to implementprefabrication methods to those bridges where prefabrication would be possible but requirecompanies and clients to address their conservative views of the bridge industry in order fordevelopment to take place entirely.Based on this and previous studies, prefabrication of concrete elements has a bright future in theconstruction industry. Industrialization would mainly benefit the end customer, which is thetaxpayer but also the professional workers with a safer and healthier workplace.
Eriksson, Andreas, and Nils Larsson. "Prefabricerade betongbroar över järnväg - En jämförelse mellan traditionell platsgjuten konstruktion och prefab på plats." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-53444.
Full textWhen new concrete bridges over railway is to be established there are many aspects that complicates the construction, such as that traffic not can be stopped completely except for short periods during the construction process. The train stop is planned many years in advance, which means that construction must be planned and performed along the planned stops. It is difficult to get to an industrial bridge construction process with higher efficiency and more repetition. The traditional cast on site method is the most common in Sweden although there are methods that could replace it. The main purpose of the report is to find out if precast concrete elements on site is a possible method to facilitate the construction of new concrete bridges over the railway. This report is based on a case study of an existing bridge project to see the benefits and improvements the method with precast on site can provide in various aspects. Also interviews and surveys was conducted to collect opinions about prefabrication and industrial bridge construction. The results in this report show that the method of prefab on site is more advantageous than the traditional cast on site method in several respects. It is a method that makes it possible to reach repetition and serial production of bridges. The interviews revealed that contractors are interested in prefabricated solutions, but among other requirements for the design and conservative view of prefabrication from clients prevents the possibility of applying the method.
Le, Guillarme Jonathan, and Jakob Lindstam. "Implementering av Structural Health Monitoring : SHM - system för detektering och övervakning av vanligt förekommande skador på betongbroar." Thesis, KTH, Byggteknik och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259696.
Full textLike many countries around the world, Sweden has an aging infrastructure and the need for maintenance is increasing. In an article in Svenska Dagbladet from 21 / 9–2018, the analysis and engineering consulting company WSP reports a rough estimate that SEK 300 billion needs to be invested to upgrade existing infrastructure. After the upgrade, it would require approximately SEK 25 billion annually to carry out ongoing condition assessment and maintenance of Sweden's road and railway networks. Today, inspections are used to assess the condition of bridges. There are three types of inspection; main inspection, general inspection and special inspection. Structural Health Monitoring (SHM) is a technology that is globally more used as a method for condition assessment of bridges. SHM aims to perform automatic assessment of the state of the entire construction and individual damages in real time. SHM uses sensors placed at critical positions to collect measurement data compared to pre-defined limit values. In Sweden, SHM is used sparingly today, where knowledge is at an academic level and there is uncertainty about how SHM should be implemented in practice. By implementing SHM, damage can be detected at an early stage and minimized by quickly performing repairs on the design before the damage becomes critical. The study aims to produce a report that can be used as a guide on how SHM can be implemented and show how the SHM systems have been implemented on previous projects. The report should give the reader an overall picture of how condition assessment is performed today, which damages are common and how SHM can be used as a tool when assessing the condition. The report also aims to provide an overall explanation in Swedish of the SHM technology and what is needed for implementation. Open unstructured interviews were conducted with researchers within SHM and damages to concrete structures as well as experts in condition assessment. The interviews were used as a starting point for further studies of commonly occurring damages and SHM techniques. In the literature study, various scientific databases were used, such as Diva and ScienceDirect, as well as KTH's library to obtain earlier material on concrete damage to bridges, its damage mechanisms and about SHM technology. Furthermore, information was obtained from a number of doctoral dissertations, articles and previous degree projects. Through literature study and interviews with experts, the study concluded that reinforcement corrosion and cracks in the concrete are damages that are commonly found in concrete bridges. The damage mechanisms are described in the report. The study identified three different systems that can be used for detection and monitoring of reinforcement corrosion and cracks, those systems are acoustic emission, SOFO system (SOFO is an abbreviation for Surveillance d'Ouvrage pair of Fiber's Optics) and MuST system (MuST is a commercial name). The report gives examples of how the systems can be used for the detection and monitoring of the damages by presenting four case studies where the systems have been used. Two of the case studies present how acoustic emission has been implemented and two of the case studies present how the SOFO-system has been implemented. The study could not identify any case study for the MuST-system and how the system was implemented. The conclusion of the study is that SHM can be used as a supplement to condition assessments but cannot for the time being used for performing automated condition assessments today.
Ansari, Mahan. "Reparationer av Ölandsbron." Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20154.
Full textThe Öland Bridge showed extensive damage only ten years after the inauguration. This makes it interesting to study bronze repairs and also repairs of concrete structures in general. Another reason that makes it interesting to study Ölandbro's measures is that there is no information regarding the implementation of repairs on the bridge. The goal is to present which repair method is appropriate and which repair action is to be applied in the repair of concrete structures.Bridge constructions are exposed to a relatively aggressive environment, such as frost attacks, corrosion attacks and salt water/chlorides from seawater, while it is expected that bridge constructions will have a long life. This means that high demands are placed on bronze durability. The purpose of this work is to investigate what affects the lifespan of the Öland bridge and concrete constructions in general and parallels are drawn between bronze repairs and future repairs. The work was introduced by studying various studies on degradation mechanisms. The study was carried out by studying bronze design drawings, discussing the causes of repair with those responsible at the bridge and obtaining various reports on the bridge. In order to be able to examine the damage and measures that affected the life of the concrete constructions, a summary was made with the aim of giving an overall picture of what affects the lifespan of the Öland bridge and concrete constructions. What was studied was measures and injuries that are linked to the lifetime of bronze. The Öland Bridge showed extensive damage only ten years after it was completed, which meant that the bridge was particularly interesting to study. To be able to draw conclusions, a summary was made of how the damage arose on Ölandsbron's constructions over the years, partly on how they are related to the lifetime of bronze. One reason why great damage occurred to the bridge was that the regulations in Sweden were vague when the bridge was built and that there was no knowledge regarding the execution when building bridges. This led to the bridge being built with the lowest cost as a priority and that the lifetime and bronze durability were not taken into account.Part of Ölandsbron's damage is due to the use of salt water as a component of the bridge construction. This led to increased corrosion attack rate and increased chloride content in the concrete, resulting in cracks on the concrete surface and the penetration of chlorides at a faster rate. The pillars of the Öland Bridge in the low level part are exposed and are the pillars that had the most serious damage. One important factor is the quality of the concrete. In bronze construction, low-quality concrete is used which is more sensitive to stress from the environment. The use of low quality concrete can adversely affect the lifetime of bronze. Most pillars at the Öland Bridge have undergone repairs in the 1980s with the aim of building a new "shell" around the pillars to create protection and prevent the penetration of chlorides.
Sæther, Leif-Kristian. "Berekningsmetodar for spennarmerte betongbruer." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26863.
Full textBondahl, Ole Sondre. "Anvendelse av fiberarmering i betongbruer : Sammenligning av alternative utførelser." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18802.
Full textHussein, Shoresh, Hemen Shaswar, and Thomas Österberg. "Jämförelse mellan en träbro och en betongbro : En LCA-analys med fokus på koldioxidutsläpp samt en LCC-analys." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-183421.
Full textBratland, Marius Lie. "Beregningsmetoder for spennarmerte betongbruer : Analyse og dimensjonering av Nøkleby bru iht. Europeisk regelverk." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for konstruksjonsteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23424.
Full text