Anzeige der Dokumente 1-16 von 16

  • Probability-Based Design and Life Cycle Assessment of a Spun Concrete Pole 

    Štěpánek, Petr; Laníková, Ivana; Šimůnek, Petr (Atlantis Press, 2015-12-15)
    This contribution compares concrete structure design results obtained via the partial reliability factor method and using a probability-based method. The Monte Carlo simulation method, modified by the Latin Hypercube ...
  • Long-action of additional horizontal prestressing on masonry 

    Pěkník, Robin; Klusáček, Ladislav (Elsevier, 2017-07-20)
    This article is focused on verifying behaviour of a brick masonry which was horizontally post-tensioned. An experimental model of three walls has been built for the measurement. The model is in scale 1:1 and represents a ...
  • Strengthening of bridges by post-tensioning using monostrands in substituted cable ducts 

    Klusáček, Ladislav; Svoboda, Adam (IOP Publishing, 2017-09-15)
    Post-tensioning is suitable, reliable and durable method of strengthening existing engineering structures, especially bridges. The high efficiency of post-tensioning can be seen in many applications throughout the world. ...
  • Effective Way to Reconstruct Arch Bridges using Concrete Walls and Transverse Strands 

    Klusáček, Ladislav; Pěkník, Robin; Nečas, Radim (IOP Publishing, 2017-09-15)
    There are more than 500 masonry arch bridges in the Czech Road system and about 2500 in the Czech Railway system. Many of them are cracked in the longitudinal (span) direction. The barrel vaults are separated by the cracks ...
  • Stochastic optimization of reinforced concrete elements’ design 

    Venclovský, Jakub; Štěpánek, Petr; Laníková, Ivana (IOP Publishing, 2018-07-04)
    Main goal of the paper is to present an algorithm for stochastic optimization of design of steel-reinforced concrete element’s cross section. Firstly, the deterministic problem is introduced and described, followed by the ...
  • Life Cycle Assessment Optimization of a Shotcrete Tunnel Lining 

    Štěpánek, Petr; Laníková, Ivana; Venclovský, Jakub (IOP Publishing, 2018-11-27)
    The proposed contribution describes the formulation of the optimization design of a utility tunnel lining. The objective function is defined as a multicriterial problem and includes economic and environmental aspects ...
  • Cost-Effective High-Performance Concrete: Experimental Analysis on Shrinkage 

    Kucharczyková, Barbara; Kocáb, Dalibor; Daněk, Petr; Terzijski, Ivailo (MDPI, 2019-08-26)
    This paper focuses on the experimental determination of the shrinkage process in Self-Compacting High-Performance Concrete (SCC HPC) exposed to dry air and autogenous conditions. Special molds with dimensions of 100 mm × ...
  • Strengthening and Rehabilitation of U-Shaped RC Bridges Using Substitute Cable Ducts 

    Svoboda, Adam; Klusáček, Ladislav; Olšák, Martin (Hindawi Limited, 2019-11-30)
    The presented paper deals with strengthening and rehabilitation of U-shaped reinforced concrete bridges from the period of 1905–1930 using post-tensioning, which is a suitable, reliable, and durable method. These bridges ...
  • Influence of an Acidic Environment on a Glass Fibre Reinforced Polymer Grid 

    Šimůnek, Petr; Štěpánek, Petr; Švaříčková, Ivana; Prokeš, Jan; Laníková, Ivana; Žítt, Petr; Miranda Mendes, Joo Pedro (EDP Sciences, 2020-03-05)
    The article deals with the influence of an acidic environment on the mechanical properties of a Glass Fibre Reinforced Polymer (GFRP) grid. The influence of an acidic environment is examined on samples cut from a GFRP grid. ...
  • Experimental model of plan curved footbridge supported by arch 

    Trenz, Jan; Zlatuška, Karel; Nečas, Radim (IOP Publishing, 2020-12-09)
    The new type of plan curved structure with the upper deck has been developed within the research of arch structures. The paper describes the process of the research and the design of the physical model in scale 1:10 built ...
  • Effects of elevated temperature on the behaviour of concrete beams reinforced with fiber reinforced polymers 

    Prokeš, Jan; Rozsypalová, Iva; Girgle, František; Daněk, Petr; Štěpánek, Petr (IOP Publishing, 2021-01-18)
    Fiber reinforced polymer (FRP) rebars have increasing popularity in the construction industry all around the world although steel rebars are widely used for reinforcing of the concrete so far. FRP bars, which have higher ...
  • Grouting below Subterranean Water: Erosional Stability Test 

    Boštík, Jiří; Miča, Lumír; Terzijski, Ivailo; Džaferagič, Mirnela; Leiter, Augustin (MDPI, 2021-04-30)
    The article is focused on the medium-term negative effect of groundwater on the underground grout elements. This is the physical–mechanical effect of groundwater, which is known as erosion. We conduct a laboratory verification ...
  • Development of Variants of High-Performance Self-Compacting Concrete with Improved Resistance to the Attack of Sulfates 

    Terzijski, Ivailo; Kocáb, Dalibor; Štěpánek, Petr; Strnad, Jiří; Girgle, František; Šimůnek, Petr (MDPI, 2021-06-26)
    This paper presents experimental and analytical work of which the main objective was to support the introduction of a new technology for the production of sewer pipes. In this technology, the pipes produced consist of two ...
  • Transverse prestressing and reinforced concrete as the key to restoration of masonry arch bridges 

    Klusáček, Ladislav; Nečas, Radim; Požár, Michal; Pěkník, Robin; Svoboda, Adam (Elsevier, 2021-08-07)
    There is still a large number of masonry arch bridges on the road and railway network. More than 80 % of arch bridges are over 100 years old so their service life has been exceeded significantly. The general focus of the ...
  • Determination of temperature gradient of slender structure 

    Velešík, Marek; Požár, Michal; Nečas, Radim (IOP Publishing, 2021-12-21)
    This study investigates convenient methods of determination of temperature gradient of slender structures in time. Correct determination of temperature along the height of the cross-section takes a key role in defining the ...
  • Anchorage length of patented wire cables in prestressed bridge girders 

    Svoboda, Adam; Klusáček, Ladislav; Nečas, Radim; Koláček, Jan; Strnad, Jiří; Olšák, Martin (Sciendo, 2021-12-30)
    This paper briefly describes the methodology, performance and the obtained results of unique experiments performed on original I-73 precast bridge girders. The main objective of the experiments was to determine the actual ...