The importance of ambient and forced vibration measurements for the results of seismic performance assessment of buildings obtained by using a simplified non-linear procedure: Case study of an old masonry building
Snoj J.,Elea iC d.o.o |
Osterreicher M.,IC Consulenten Ziviltechniker GesmbH |
Dolsek M.,University of Ljubljana
Bulletin of Earthquake Engineering | Year: 2013
The seismic performance assessment of existing masonry buildings involves many uncertainties, whose impact can be reduced to some extent by using non-destructive in-situ tests of such buildings, at least when destructive in-situ tests, which can provide more reliable results, cannot be performed. In this paper the extent of the potential beneficial effects achievable by calibration of a structural model of a building to its experimentally estimated vibration periods has been investigated. This was done by performing measurements of ambient and forced vibrations on an old two-storey masonry building, and by then assessing its seismic performance using a simplified nonlinear method. The results of numerical investigations revealed that the natural vibration periods of such buildings can be reproduced with sufficient accuracy, although it is possible that they will be overestimated or underestimated by analysts by up to around 40 %. This means that the accuracy of the prediction of the intermediate results of the seismic performance assessment of any particular building can be significantly increased by calibration of the structural model. Additionally, the beneficial effects of such calibration were observed even in the case of the final outcome of the nonlinear analysis, which is expressed through the near-collapse limit state capacity in terms of the peak ground acceleration. © 2013 Springer Science+Business Media Dordrecht.
Agency: European Commission | Branch: FP7 | Program: CP-SoU | Phase: EEB.ENERGY.2012.8.8.3 | Award Amount: 30.14M | Year: 2013
The EU-GUGLE project mobilises public / private resources to build showcases of totally around 226,000 m2 of cost-efficient urban Zero Carbon Building Renovation models in AT, FI, DE, IT, SK & ES - together with associated cities in SE&TR. EU-GUGLE is designed to respond to the needs of an effective take-off of the Smart City initiative within the EU SET-plan and in particular by demonstrating different sustainable energy technologies and techniques integrated in an intelligent way within lighthouse buildings. Although the individual demonstration projects are independent from each other, being designed to fulfil local building-user needs and utilising local resources perfectly integrated in these smart objects, there are many similarities between them. The foreseen implementation plan is a symbiosis of integrating activities, such as Sharing latest research results especially of retrofitting technologies & smart RES integration into buildings Demonstrating appropriate energy solutions in order to reach energy savings of 25.6 GWh/a for heating and DHW and 2.5 GWh/a for electricity in terms of primary energy Establishing adequate business environment favourable for Smart City demonstrations Serving as benchmark for sustainable buildings&districts and spreading best-practice Implementing innovative retrofitting technologies & techniques validated in six partner cities Developing a transparent EU-GUGLE model for immediate replication in three associated cities and abroad. Connecting social needs of building-users with innovative market actors. By deploying an interdisciplinary approach, an innovative / cost-efficient mix of actions, a set of sustainability oriented solutions will be pointed out and transferred to and among the identified target groups of EU-GUGLE. The outcomes and related benefits will be fully exploited by an effective range of actions generating local activities with high visibility character together with the major stakeholders.
Agency: European Commission | Branch: FP7 | Program: CIP-EIP-EI-PMRP | Phase: | Award Amount: 5.52M | Year: 2012
The main objective of the CELLULAC project is to scale-up the technology of an innovative processing pathway which can make use of cellulose feedstock for the production of value added products such as lactic acid (LA). Within the project a fully operational demonstration plant for lactic acid production is to be engineered, constructed and operated in order to soundly prove the technological and economical feasibility of the new technology. The implementation at demonstration scale (app. 1000 t LA/a) will deliver highly specific results to underpin the maturity of the technology and to provide clear evidence that the processing technology is ready for market uptake. The CELLULAC project brings together highly successful national technology developments to form an integrated new production process for LA which is driven by conjoined forces at European level. It targets the establishment of a technology front runner position built upon sound facts and data which are highly relevant for the European economy.
Gamsjager H.,Zublin AG |
Atzl G.,IC consulenten Ziviltechniker Gesmbh
Geomechanik und Tunnelbau | Year: 2012
Contract B-9528 - Södermalm Tunnel is a good example of urban tunnelling, where tunnel alignments cannot be chosen freely due to existing buildings and subsurface structures. Around ten tunnel crossings and a number of difficult situations underpassing existing buildings were in the scope of Södermalm Tunnel with the main focus on the Maria Magdalena Church. A NATM approach enabled tunnelling of the first double track tunnel in Stockholm's Esker to succeed in very close vicinity of the church. © 2012 Ernst & Sohn Verlag f?r Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.
Schubert P.,IC consulenten Ziviltechniker GesmbH |
Voringer J.,G. Hinteregger and Sohne Baugesellschaft m.b.H. |
Hofmann B.,G. Hinteregger and Sohne Baugesellschaft m.b.H.
Geomechanik und Tunnelbau | Year: 2014
This paper deals with the boundary conditions regarding layout, geotechnics and economics required to make a full-face excavation of a tunnel. A flowchart for decision-making leads to four different excavation sequences. Unsuitable geometrical conditions and very unfavourable geotechnical conditions exclude full-face excavation. Under other boundary conditions, a full-face excavation may show economic advantages, which should be further exploited in our region. © 2014 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.
Klais F.,OBB Infrastruktur AG |
Wagner O.K.,OBB Infrastruktur AG |
Proprenter M.,IC consulenten Ziviltechniker GesmbH |
Wolf P.,OBB Infrastruktur AG
Geomechanik und Tunnelbau | Year: 2015
The present invitation to tender for the third tunneling contract of the Semmering Base Tunnel is the last one to complete the tunnel. This contract section has not reached the dimensions of its preceding sections SBT2.1 and SBT1.1 concerning the extent of construction work and time for completion. Nonetheless it emerged to an extremely complex project caused by a gain of knowledge regarding the ground conditions, during the process of preparing the tender documents. This knowledge led to an adjustment containing comprehensive grouting measures and a temporary intermediate construction access via two vertical shafts. Furthermore a sophisticated order of construction sequences for the installation of facilities in the invert and the concrete lining had to be issued, which considered a progressive takeover by subsequent contractors. Additional challenges arose because the tendering documents were adjusted while concurrently the design of documents for the partial modification of the construction permission had to be prepared. Mit der dritten Tunnelbauausschreibung des Semmering-Basistunnel wird der letzte Rohbauabschnitt in geschlossener Bauweise - das Baulos SBT3.1 "Tunnel Grautschenhof" - vergeben. Liegt dieses Baulos hinsichtlich Bauumfang und Bauzeit etwas hinter den Dimensionen seiner Vorgängerlose SBT2.1 und SBT1.1, so hat es sich im Zuge der Erstellung der Ausschreibungsdokumente auf Grund neuer Baugrunderkenntnisse zu einem äußerst komplexen Ausschreibungs- und Bauprojekt entwickelt. Umfangreiche Injektionsmaßnahmen, ein temporärer Zugang über zwei Schächte und ein komplexer Bauablauf für den Innenausbau mit gestaffelten Übergaben an das Nachfolgegewerk stellen die wesentlichsten Herausforderungen für den künftigen Bau dar. Die Änderung des Zwischenangriffs von einem Zugangstunnel auf zwei Schächte und die damit verbundene planungsparallele Umsetzung einer Änderung des teilkonzentrierten Genehmigungsprojektes für die Baugenehmigung erschwerten die Planungsphase zusätzlich. © 2015 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.
New semmering base tunnel - The current state of tunnel design taking the newest investigation results into account [Semmering-Basistunnel neu - Aktueller Stand der Tunnelplanung unter Berücksichtigung der neuesten Erkundungsergebnisse]
Daller J.,IC consulenten Ziviltechniker GesmbH |
Vigl A.,Viglconsult ZT |
Wagner O.K.,OBB Infrastruktur AG
Geomechanik und Tunnelbau | Year: 2010
As result of the two-year route selection process, the southernmost variant Pfaffensattel was chosen in April 2008 as the best variant for the New Semmering Base Tunnel, which run from Gloggnitz to the Mürzzuschlag-Langenwang area, and the route has since been optimised for design through a detailed programme of investigations. As a result of this, the final route of the tunnel was fixed in autumn 2009. All design work for the partially concentrated approvals process are now based on this route. This article is concerned with the essential technical tunnel construction aspects of the design to be handed in for approval, above all the construction concept and the procedure for geotechnical design to be used as a basis. At the time of writing this article, the final evaluation of the geomechanical and hydrogeological investigations and the geotechnical design are still underway. © 2010 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co.
Laimer H.J.,Austrian Federal Railways OBB Infrastruktur AG |
Mullegger M.,IC consulenten Ziviltechniker GesmbH
Geografiska Annaler, Series A: Physical Geography | Year: 2012
The Wachau-Danube Valley represents a transverse valley, intersecting the Variscian Bohemian Massif. Weakened rocks along fault structures led to accelerated river erosion, forming relatively steep rock slopes. The exceptional cultural position of the region generated an increasing demand for building materials. Over the centuries quarrying had a sizeable impact on slope morphology. Interdependences between quarrying and construction caused unstable rock slopes and four rock-mass falls have occurred at two quarries near Spitz (1961, 1984, 2002) and Dürnstein (2009). Rock mechanical analysis at these quarries has shown that the combination of existing geological discontinuities and artificially modified morphology is fatal in terms of slope stability. In Spitz the bedding planes within the marble had been undercut by the mining face. Additionally, two conjugated, steeply dipping joint sets formed large scale blocks sliding on bedding planes. In three major rockslides/rock-mass falls, each triggered by heavy rainfalls, a total mass of 170000m3 of rock failed. At the quarry near Dürnstein the geotechnical characteristics of the gneiss are also unfavourable in relation to the exposition of the mining face. After several rockfalls, 65000m3 were blasted away in 1909 to remove unstable rock slopes. The residual rock face was destabilized and rockfall activities culminated in an event with a total volume of approximately 15000m3. Remedial measures for both locations are essential to maintain transport infrastructure. Sufficiently stable conditions can only be achieved by extensive reshaping of the mining faces, which involves adapting slope geometries to naturally stable joint faces. © 2012 The authors. Geografiska Annaler: Series A, Physical Geography © 2012 Swedish Society for Anthropology and Geography.
Geotechnical monitoring as key safety management element at the Dürnstein/Wachau rockslide [Geotechnische messungen als zentraler bestandteil des sicherheitsmanagementplans beim felssturz Dürnstein/Wachau]
Mullegger M.,iC consulenten Ziviltechniker GesmbH |
Lenz G.,iC consulenten Ziviltechniker GesmbH |
Laimer H.J.,OBB Infrastruktur AG
Geomechanik und Tunnelbau | Year: 2011
Following a rockslide in a former quarry near the town of Dürnstein/ Wachau, extensive remedial measures were necessary to restore the damaged rail infrastructure and ensure long term safety. To provide for safe working conditions during the phase of construction of additional protection measures, a geotechnical risk management system based on the observational method per EC 7 was developed and implemented. Geotechnical monitoring was a key safety management element. The paper discusses the specific challenges, practical approaches and general experiences associated with the use of the observational method for the monitoring of cliff faces. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co.
Agency: European Commission | Branch: FP7 | Program: CP | Phase: ENERGY.2008.8.4.1 | Award Amount: 20.56M | Year: 2009
The SOLUTION project mobilises public / private resources to build showcases of energy self sufficient communities in Austria, Croatia, Finland and Switzerland (together with the associated Slovenian community) with a strong potential for replication throughout Europe. SOLUTION is designed to respond to the needs of an effective take-off of the European SET-plan by demonstrating novel applications of different energy technologies and techniques integrated in an intelligent way within model areas. Although the individual demonstration projects are independent from each other, being designed to fulfil local energy needs and using local resources, there are many similarities between them. The implementation plan is a mix of local and integrating activities, such as 1)sharing latest research results especially of electricity storage, customer behaviour and intelligent RES integration, 2)demonstrating appropriate energy solutions in order to reach self-sufficiency, 3)establishing adequate business environment favourable for CONCERTO demonstrations, 4)serving as benchmark for sustainable communities and spreading best-practice, 5)developing a transparent SOLUTION model for immediate replication. By deploying an interdisciplinary approach, an innovative / cost-efficient mix of actions, a set of sustainability oriented solutions will be pointed out and transferred to and among the identified target groups of SOLUTION. The outcomes and related benefits will be fully exploited by an effective range of actions generating local activities with high visibility character together with the major stakeholders. Thus the members of the consortium will act as forerunners towards the low carbon future. The consortium composition is a balanced mix of representative model areas ready for demonstration and of 17 communal, industrial and scientific European partners (incl. 6 SMEs) with a wide geographical spread, complementary resources and expertise.