A5091904778- Fire effects on concrete materials
- Structural Response to Dynamic Loads
- Structural Behavior of Reinforced Concrete
- Fire dynamics and safety research
- Innovative concrete reinforcement materials
- Concrete Properties and Behavior
- Concrete and Cement Materials Research
- Engineering and Material Science Research
- Concrete Corrosion and Durability
- Structural Analysis of Composite Materials
- Grouting, Rheology, and Soil Mechanics
- Numerical methods in engineering
- Structural Load-Bearing Analysis
- Thermography and Photoacoustic Techniques
- Animal Virus Infections Studies
- High-Velocity Impact and Material Behavior
- Rock Mechanics and Modeling
- Herpesvirus Infections and Treatments
- Immunotherapy and Immune Responses
University of Stuttgart
2013-2024
Addition of steel fibres to concrete is known have a significant positive influence on the mechanical properties concrete. Micro polypropylene (PP) are added improve its performance under thermal loads such as in case fire by preventing phenomena explosive spalling. An optimum mixture and micro PP may be utilized enhance both behaviour In this work, systematic investigations were carried out study elevated temperature physical high strength without with fibres. Three different mixtures for...
Explosive spalling of high performance concrete under fire is one the major concerns in front engineering community today. It associated with violent failure thin layers resulting sudden reduction load carrying capacity which may lead to complete collapse. High pore pressures due low permeability and stresses thermal gradients are considered be governing causes explosive spalling. However, mechanisms all influencing parameters not yet fully understood. The most popular method prevent...
Reinforced concrete (RC) structures may be subjected to accidental fire loads during their service life. In such a case, it is essential have appropriate methods for the estimation of post-fire performance. One vital aspects performance RC adequate steel-to-concrete bond. The bond behaviour under ambient conditions very well established. However, an model assessment capacity still lacking. order provide more insight into after fire, 3D FE numerical study using thermo-mechanical with...
Permeability of concrete without and with polypropylene fibres is experimentally measured at temperatures up to 300 °C by employing a new test setup. To investigate explosive spalling cover numerical modelling carried out using coupled Thermo-Hygro-Mechanical model oriented towards multi-scale approach. Load induced thermal strains are investigated meso-scale it found that the most part these can be captured model.
The decay in the local bond performance of reinforcement bars concrete due to exposure high temperature is often investigated performing pull-out tests on steel rods embedded center specimens.The are generally performed residual state i.e. upon cooling down room temperature.However, this approach neglects not only detrimental effects splitting strength bond, but also application a sustained load during heating phase, as real applications.This paper investigates between and after temperatures...
This study is part of a comprehensive research effort focused on examining the impact various parameters post-fire bond behaviour RC flexural members. Precisely, rebar diameter thoroughly discussed. Beam-end specimens, which realistically simulate boundary conditions full-scale beam while maintaining relatively compact size, were subjected to ISO 834 fire curve. To investigate lap-splice in slab and beam, two different exposure scenarios, where one side (slab) three sides (beam) specimens...
As heterogeneous material, concrete exhibits very complex behavior when exposed to elevated temperature.One of the important aspects is load-induced thermal strain (LITS), which represents difference between non-loaded and loaded concrete.Even though a great amount research has been performed so far, there still no general consensus about mechanism that leads change in compression prior heating.In present paper, analyzed employing 3D finite element code with temperature dependent microplane...