scholarly journals The structural fire design of concrete structures with externally bonded reinforcement and fire protection system

2013 ◽  
Vol 12 (1) ◽  
pp. 179-186
Author(s):  
Piotr Turkowski
Keyword(s):  
Fire Protection ◽  
Test Procedure ◽  
Structural Members ◽  
Rc Structures ◽  
Structural Fire ◽  
Building Research Institute ◽  
Protection Systems ◽  
Externally Bonded ◽  
In Fire ◽  
Fire Design

This work describes the structural fire design process of RC structures with externally bonded reinforcement. First part is based on the calculation method given in EN 1992-1-2 and addresses the question whether the fire protection of externally bonded reinforcement is necessary in every situation? The second part shows what such fire protection should look like and how it should be designed. Moreover, a test procedure for determining the effectiveness of applied fire protection systems to concrete structural members reinforced with FRP, used in Fire Testing Laboratory of Building Research Institute (ITB) is presented.

The Influence of Spalling on the Fire Resistance of RC Structures

2011 ◽  
Vol 255-260 ◽  
pp. 519-523 ◽  
Author(s):  
Xin Meng Yu ◽  
Xiao Xiong Zha ◽  
Zhao Hui Huang
Keyword(s):  
Fire Resistance ◽  
Elevated Temperatures ◽  
Analysis Procedure ◽  
Structural Members ◽  
Thermal And Mechanical Properties ◽  
Structural Behaviour ◽  
Rc Structures ◽  
Parametric Studies ◽  
Rc Slabs ◽  
In Fire

A great many of experiments has shown that reinforced concrete (RC) structures suffered from spalling in fire. However, at present there are still no convincing spalling predicting models available due to the inhomogeneous nature and complicated thermo-hydro-mechanical interactions in concrete at elevated temperatures. In order to evaluate the fire resistance of RC structures which are subjected to concrete spalling, a thermal analysis procedure is developed which considers the effects of spalling on the growth of temperature in RC members. The predicted temperatures are then used to model the structural behaviour. The spalled portion of concrete is modelled as "void", which has no thermal and mechanical properties. A series of parametric studies carried out on RC structural members with different boundary conditions shows that the influence of spalling on fire resistance is very significant apart from the RC slabs subject to higher laterally restraint.

Water Hammer Analysis/Prevention/Mitigation in Fire Protection Systems at Power Plants

2003 ◽  
Author(s):  
Asif H. Arastu ◽  
Eugene Tom
Keyword(s):  
Fire Protection ◽  
Nuclear Power ◽  
Power Plants ◽  
Void Formation ◽  
Water Hammer ◽  
Mitigation Strategies ◽  
Physical Damage ◽  
Protection Systems ◽  
Piping Networks ◽  
In Fire

Fire Protection water systems are typically piping networks where water is pumped from a low elevation reservoir at atmospheric pressure to higher elevations in the buildings served by the system. Because of this nature of their design, they are prone to water hammers due to water column separation & rejoining. A loss of pressure can lead to void formation at high elevations whose collapse can result in severe water hammer. A damaging water hammer event that occurred at a nuclear power plant (Arastu, et al, 1999) causing a catastrophic valve failure pointed to the need to prevent and mitigate such potential events at other plants. One important aspect of that event is that prior to it, several events of similar magnitude had occurred that did not apparently cause physical damage but degraded the system sufficiently to make it susceptible to damage. This paper discusses the causes of water hammer in Fire Protection Systems at power plants and identifies analysis, prevention, and mitigation strategies. Using a Method Of Characteristics based program, computer simulation results of the application of the mitigative measures are given for three large plant systems to demonstrate the effectiveness of the measures proposed at these plants.

scholarly journals Differences between standards related to fire protection systems design

Tehnika ◽  
2021 ◽  
Vol 76 (3) ◽  
pp. 386-392
Author(s):  
Radoje Jevtić
Keyword(s):  
Fire Protection ◽  
Material Properties ◽  
Systems Design ◽  
Protection Systems ◽  
The World ◽  
In Fire

Fire protection and design of fire protection systems present very important engineering tasks in protection of human lives, animals and material properties. Because of its great significance, everything in fire protection and fire protection systems design must be defined by appropriate standards. There are several different standards in use in different countries around the world. Very often, in solvation of different fire protection tasks, there are many questions asked which standard should be used. There are many similarities between standards, but there are also many differences between standards. Also, some standards don't define at all some cases that can be found in fire protection. This paper was written to present solutions for some particular tasks by some valid standards (EN 54, BS, NPB 88-2001, VDE 088-2 and NFPA 72) in fire protection and differences between them in the same cases.

Temperature Distributions of Protected Cellular Beams Heated Three Sides

2014 ◽  
Vol 578-579 ◽  
pp. 180-183
Author(s):  
Li Zhu ◽  
Xu Dong Wang ◽  
Pei Jun Wang
Keyword(s):  
Heat Transfer ◽  
Fire Protection ◽  
Fire Modeling ◽  
Bottom Flange ◽  
Structural Members ◽  
Uniform Temperature ◽  
Lower Region ◽  
Temperature Distributions ◽  
The Web ◽  
Fire Design

The fire design of structural members depends greatly on temperature distributions. This paper focuses on the temperature distributions of protected cellular beams subject to fire. Modeling in ABAQUS indicates that the fire protection makes a big difference to the temperature distributions of cellular beams. A continuous drop in temperature in the upper region of the web occurs due to heat transfer from the web to the top flange, and consequently to the ambient. Heat transfer between the web and the bottom flange also takes place resulting in non-uniform temperature distributions in the lower region of the web. Comparison with predictions from the European codes shows a good correlation between each other, but with some discrepancies.

Seismic Capacity of Threaded, Brazed and Grooved Fire Protection Pipe Joints

2012 ◽  
Author(s):  
Brent Gutierrez ◽  
George Antaki
Keyword(s):  
Fire Protection ◽  
Failure Modes ◽  
Shake Table ◽  
Dynamic Failure ◽  
Lateral Loads ◽  
Seismic Capacity ◽  
Shake Table Tests ◽  
Protection Systems ◽  
Pipe Joints ◽  
In Fire

A series of static and shake table tests were conducted on pressurized threaded, brazed and mechanical, i.e., grooved pipe joints, commonly used in fire protection systems. The objective of the tests was to understand the behavior and failure modes of these common types of joints under seismic and static lateral loads. The paper presents the measured loads and deflections of the joints up to the point of failure. It also describes the joints’ static and dynamic failure modes. While this information may be limited it can be used to model the joint flexibility under large lateral loads, determine their capacity, and help understand the leak and rupture characteristics of threaded, brazed and clamped joints.

scholarly journals THE FIRE SIMULATION AS A SAFETY ADVANTAGE IN FIRE PREDICTION AND FIRE PROTECTION

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Radoje Jevtic
Keyword(s):  
Key Words ◽  
Fire Protection ◽  
Material Damage ◽  
Fire Simulation ◽  
Nikola Tesla ◽  
Protection Systems ◽  
Successful Design ◽  
In Fire ◽  
Safety Advantage

Fire presents the process of uncontrolled combustion that makes material damage and endangers human lives. It is important to know many factors that fire depends on for successful design and realization of fire protection systems. One of the most effective, the most economic and the most reliable ways to determine propagation of potential fire is the use of simulation programmes. In this paper, the usage of the PyroSim 2012 simulator in the potential fire determination was presented. A simulated facility was chosen to be the Electrotechnical school „Nikola Tesla“ in Niš. Key words: fire, simulation, FDS, evacuation

How to maintain a reasonable Quality Level in Fire Protection Systems

2004 ◽  
pp. 2250-2255
Author(s):  
Ingeborg Schlosser ◽  
Joachim Böke ◽  
Rainhard Lüttenberg
Keyword(s):  
Fire Protection ◽  
Quality Level ◽  
Protection Systems ◽  
In Fire

scholarly journals BEHAVIOUR OF ALUMINIUM STRUCTURES IN FIRE, A review

2016 ◽  
Author(s):  
Davor Skejić ◽  
Ivan Ćurković ◽  
Marija Jelčić Rukavina
Keyword(s):  
Carbon Steel ◽  
Structural Material ◽  
Fire Resistance ◽  
Steel Structures ◽  
Future Research ◽  
Surface Emissivity ◽  
Structural Behaviour ◽  
Structural Fire ◽  
In Fire ◽  
Fire Design

The interest in the application of aluminium as a structural material has been greatly increased in recent years. However, behaviour of aluminium structures when exposed to fire is still relatively unresearched. Due to low melting temperature of the alloy, aluminium structures have low fire resistance, but aluminium is reflective and has surface emissivity which is more than two times lower compared to carbon steel. The Eurocode facing this issue (EN 1999-1-2) is based mainly on the Eurocode for structural fire design of steel structures (EN 1993-1-2) and therefore is not fully suitable for the application on aluminium structures. Here, an overview of the structural behaviour of aluminium structures exposed to fire is given through the comparison with steel structures. As a conclusion, priorities for a future research are highlighted, which should provide a base for the next generation of modern codes for structural fire design of aluminium structures.

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