Numerical Analysis of Fire Behavior of a Large Space Pre-Stressed Steel Structure under Fire

2011 ◽  
Vol 71-78 ◽  
pp. 3729-3732
Author(s):  
Ming Zhou ◽  
Zhi Guo Xie ◽  
Xin Tang Wang
Keyword(s):  
Numerical Analysis ◽  
Fire Behavior ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Large Space ◽  
Fire Source ◽  
Lattice Shell ◽  
In Fire ◽  
Influence Degree

The computational model of numerical analysis of a suspended pre-stressed steel reticulated shell subjected to fire load is established with using the software Marc. Based on the model presented here, numerical analysis of thermal response and structural response of the pre-stressed steel structure are computed. The different space height and different rise-span ratio are considered for analysis of response temperature, displacements and stresses of the pre-stressed lattice shell under fire for one fire source. It is also shown that displacement of the node right above the inner cable is the maximum among the four nodes presented here as the fire source is located at the position right below the second-ring cable of the structure. It is concluded that the influence degree of space height of the structure on the fire response of the structure is not great, but rise-span ratio has obvious and great effect on displacements and stresses of the pre-stressed steel structure with large span in fire.

Analysis of Performance of Suspended Pre-Stressed Steel Shells with Large Span in Fire

2011 ◽  
Vol 71-78 ◽  
pp. 3717-3720
Author(s):  
Xin Tang Wang ◽  
Jie Yin ◽  
Ming Zhou ◽  
Zhi Guo Xie
Keyword(s):  
Numerical Analysis ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Fire Load ◽  
Fire Source ◽  
Air Temperatures ◽  
Lattice Shell ◽  
In Fire ◽  
Analysis Of Performance

The computational model of numerical analysis of a suspended pre-stressed steel reticulated shell subjected to fire load is established with using the software Marc. Based on the model presented here, numerical analysis of thermal response and structural response of the pre-stressed steel structure are computed for the key nodes of the structure. The different location of fire source and different space height are considered for analysis of response temperature, displacements and stresses of the pre-stressed lattice shell. It is shown that the air temperatures was much higher than the response temperatures of the nodes of the lattice shell during a quite period of time after a fire takes place, and the temperature of the cable nodes are also less than the air temperature near the nodes. It is also concluded that displacement of the node right above the inner cable is the maximum among the four nodes as the fire source is located at the position under the middle cable.

Analysis of Fire Response of a Spacial Pre-Stressed Steel Structure Subjected to Fire Load

2011 ◽  
Vol 255-260 ◽  
pp. 246-250
Author(s):  
Xin Tang Wang ◽  
Zhi Guo Xie ◽  
Ming Zhou ◽  
Fen Bo Yu
Keyword(s):  
Fire Behavior ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Large Space ◽  
Air Temperatures ◽  
Long Time ◽  
Lattice Shell ◽  
In Fire ◽  
Key Nodes

The numerical model for analysis of fire behavior of the spatial pre-stressed steel structure is established based on the software Marc. Analysis of thermal response and structural response of a suspended pre-stressed steel reticulated lattice shell are computed for the key nodes of the structure. For comparison, the air temperatures near the key nodes are also calculated based on the practical formula of large space air temperature rise. The different location of fire source is considered for analysis of response temperature, displacements and stresses of the nodes of the pre-stressed lattice shell. It is shown that the air temperatures obtained from the practical formula was always higher than the response temperatures of the nodes of the lattice shell during a quite long time after a fire takes place. The results show that the displacement of the node near the center of the gymnasium in fire is close to that of the node right above the inner cable, and the displacement of the node right above the outer cable is much less than the result of the center node.

Numerical Analysis of Fire Performance of a Spacial Pre-Stressed Steel Structure in Fire

2013 ◽  
Vol 790 ◽  
pp. 189-192
Author(s):  
Tian Hong Wang ◽  
Jin Can Xu ◽  
Hai Lun Tong ◽  
Xin Tang Wang
Keyword(s):  
Thermal Expansion ◽  
Numerical Analysis ◽  
Numerical Model ◽  
Stress Relaxation ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Fire Performance ◽  
Maximum Value ◽  
In Fire

The numerical model of analysis of fire performance of a spatial pre-stressed steel structure with large span was established based on the software Marc. The thermal response and structural response of the pre-stressed steel structure was computed for some nodes of the structure in fire. The different fire scenes were considered for analysis of response temperature, displacements and stresses of the nodes of the pre-stressed steel structure.It is concluded that the temperature rise of the nodes of the structure is far behind that of air near the nodes, however they are quite close as the fire lasted for 3600s and almost the same after 7200s.The results show that the displacement of the node right above the inner cable is the maximum and the node above the outer cable has the smallest value of displacement and the maximum value is about two and half times as large as the minimum.The results show that the reason why the cables are out of work is that the equilibrium between the cables and the rods of the structure is lost, but not that the stress relaxation caused by thermal expansion make the cables out of work.

Research on Fire Behavior of a Suspended Pre-Stressed Steel Reticulated Shell with Large Span

2011 ◽  
Vol 243-249 ◽  
pp. 1223-1227
Author(s):  
Xin Tang Wang ◽  
Ming Zhou ◽  
Zhi Guo Xie ◽  
Feng Bo Yu
Keyword(s):  
Numerical Analysis ◽  
Air Temperature ◽  
Fire Behavior ◽  
Steel Structures ◽  
Large Space ◽  
Large Span ◽  
Fire Source ◽  
Air Temperatures ◽  
Lattice Shell ◽  
Key Nodes

In order to study the fire-resistance behavior of the spatial pre-stressed steel structures with large span, the model of numerical analysis of a suspended pre-stressed steel reticulated shell subjected to fire load is established with using the software Marc. Based on the model presented here, numerical analysis of thermal response and structural response of the pre-stressed steel structure are computed for the key nodes of the structure. For comparison, the air temperatures near the key nodes are also calculated based on the practical formula of large space air temperature rise. The different location of fire source is considered for analysis of response temperature, displacements and stresses of the nodes of the pre-stressed lattice shell. It is shown that the air temperatures was much higher than the response temperatures of the nodes of the lattice shell during a quite period of time after a fire takes place, and the temperature of the cable nodes are also less than the air temperature near the nodes. It is also concluded that not the cable nearest the fire source but the other cables around the cable fail to work first in the fire.

Research on Behaviour of a Pre-Stressed Suspended Lattice Shells Subjected to Fire Load

2011 ◽  
Vol 243-249 ◽  
pp. 1219-1222
Author(s):  
Zhi Guo Xie ◽  
Xin Tang Wang ◽  
Ming Zhou ◽  
Jie Yin
Keyword(s):  
Thermal Response ◽  
Structural Response ◽  
Shell Element ◽  
Fire Load ◽  
Fire Temperature ◽  
Fire Source ◽  
Lattice Shell ◽  
Fire Scene ◽  
Lattice Shells ◽  
Key Nodes

Numerical analysis of thermal response and structural response of a suspended pre-stressed steel reticulated lattice shell are conducted for the key nodes of the structure of a gymnasium on software FDS. Two different location of fire source are considered for analysis of response displacements and stresses of the nodes of the pre-stressed lattice shell and three cables. It is shown that the response temperatures of three cables set in the structure have similar variation trend for the fire scene presented here and the fire temperature near inner cable is highest among the three cables. It is concluded that the shell element of center of the structure has largest response stress, and the element above the side cable has larger stress than the shell element above the middle cable when the fire source is located at center of the gymnasium. It is shown that decrease of the pre-stress of the outer cable far away from the fire source is smallest among the three cables set in the structure.

Numerical Analysis of Pre-Stressed Steel Trusses Subjected to Fire Load

2010 ◽  
Vol 163-167 ◽  
pp. 799-803
Author(s):  
Xin Tang Wang ◽  
Ming Zhou ◽  
Wan Zhen Wang
Keyword(s):  
Numerical Analysis ◽  
Fire Behavior ◽  
Steel Structure ◽  
Material Model ◽  
Fire Load ◽  
Steel Material ◽  
Proper Material ◽  
In Fire ◽  
Steel Trusses ◽  
Suggested Formula

The computational model of numerical analysis of the planar pre-stressed steel trusses subjected to fire load is established according with main consideration to the response mechanism of the structure in fire. For the convenience of application, the EC3 constitutive model of the steel materials in fire is simplified with series expansion, and the suggested formula for each stage are unified. The fire behavior of the planar pre-stressed tubular steel trusses in which two cables are set is analyzed with the model presented here and the effect law of different factors on the bearing capacity of the structures in fire are discussed. It is concluded that fire response of the pre-stressed steel trusses is affected obviously by the different model of material under the same fire conditions, and critical temperature of the structure in fire increases with strength grade of steel material, which means that choice of the proper material model used for analysis of behavior of the steel structure under fire is very important and need to be studied further.

Numerical Analysis of Laminated Veneer Lumber Panels in Fire

2015 ◽  
Vol 784 ◽  
pp. 104-110
Author(s):  
Van Diem Thi ◽  
Mourad Khelifa ◽  
Mohammed El Ganaoui ◽  
Yann Rogaume
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Cross Section ◽  
Thermal Model ◽  
Fire Behavior ◽  
Laminated Veneer Lumber ◽  
In Fire

This paper presents models for calculating the fire behavior of Laminated Veneer Lumber (LVL) elements. A 2D FE thermal model was employed to analyze heat transfer within LVL panels. The thermal model was found to provide good predictions when comparing the calculated temperatures and residual cross-section dimensions of LVL panels with the experiment results.

Flashover and instabilities in fire behavior

1980 ◽  
Vol 38 ◽  
pp. 159-171 ◽  
Author(s):  
P.H. Thomas ◽  
M.L. Bullen ◽  
J.G. Quintiere ◽  
B.J. McCaffrey
Keyword(s):  
Fire Behavior ◽  
In Fire

The York-Arup cable experiments: Implications for the fire design of cable-supported bridges

2021 ◽  
Author(s):  
Benjamin Nicoletta ◽  
John Gales ◽  
Panagiotis Kotsovinos
Keyword(s):  
Thermal Strain ◽  
Experimental Studies ◽  
Thermal Response ◽  
Structural Response ◽  
Fire Performance ◽  
Stay Cable ◽  
Stay Cables ◽  
Bridge Structures ◽  
Recent Trends ◽  
High Level

<p>Recent trends towards performance-based fire designs for complex and critical structures have posed questions about the fire resilience of bridge infrastructure. There are little-to-no code requirements for bridge fire resistance and practitioner guidance on the subject is limited. Research on the fire performance of cable-supported bridge structures is scarce and knowledge gaps persist that inhibit more informed fire protection designs in a variety of bridge types. There have been few numerical or experimental studies that investigate the fire performance of steel stay-cables for use in cable-supported bridges. The thermal response of these members is critical as cable systems are highly dependent on the response of individual members, such as in the case of an anchor cable for example. The study herein examines the thermal response of several varieties of unloaded steel- stay cable during exposure to a non-standard methanol pool fire and the implications for the structural response of a cable-supported bridge. Experimental thermal strain data from fire tests of various stay-cables is used to inform high-level insights for the global response of a cable-supported bridge. Namely, the effects of cable thermal expansion on the overall cable system is approximated.</p>

Sign in / Sign up

Export Citation Format

Share Document