Temperature fields for fire resistance analysis of structures exposed to natural fires in large space buildings

2020 ◽  
Vol 29 (4) ◽  
Author(s):  
Guowei Zhang ◽  
Huaxiang Li ◽  
Guoqing Zhu ◽  
Junyi Li
Keyword(s):  
Fire Resistance ◽  
Temperature Fields ◽  
Large Space ◽  
Resistance Analysis ◽  
Natural Fires

scholarly journals Performance-Based Analysis of Single-Layer Cylindrical Steel Reticulated Shells in Fire

2020 ◽  
Vol 10 (9) ◽  
pp. 3099
Author(s):  
Zhiwei Yu ◽  
Chen Lu ◽  
Yiqin Zhong
Keyword(s):  
Fire Resistance ◽  
Rapid Development ◽  
Single Layer ◽  
Steel Structures ◽  
Temperature Fields ◽  
Fe Model ◽  
Fire Dynamics ◽  
Interior Space ◽  
Coating Materials ◽  
Fire Scenarios

With the rapid development of architectural technology, long-span structures have been widely used due to their vast interior space and beautiful architectural composition. Due to the characteristics and high costs of coating materials on large steel structures, fire resistance designs for these kinds of structures have become more and more important. This paper presents comprehensive case analyses of the fire performance of single-layer cylindrical reticulated shells. Nonuniform fire temperature fields of single-layer cylindrical reticulated shells in different fire scenarios were generated using a Fire Dynamics Simulator (FDS). The influences of different parameters on the air temperature field during a fire in a reticulated shell structure were analyzed. A Finite Element (FE) model was developed using the FE software ABAQUS to model the structural behavior of single-layer cylindrical reticulated shells in different fire scenarios. The effects of various parameters on the responses of single-layer cylindrical reticulated shells during a fire were investigated. Using the results from the performance-based analysis in this research, we propose some recommendations for fire resistance designs for single-layer cylindrical reticulated shells.

Research on Fire Resistance Performance of Pre-Stressed Suspended Steel Reticulated Shell

2010 ◽  
Vol 163-167 ◽  
pp. 790-794
Author(s):  
Feng Bo Yu ◽  
Xin Tang Wang ◽  
Ming Zhou ◽  
Wan Zhen Wang
Keyword(s):  
High Temperature ◽  
Fire Resistance ◽  
Steel Structure ◽  
Steel Structures ◽  
Space Structure ◽  
International Standards ◽  
Large Space ◽  
Finite Element Software ◽  
Large Space Structure ◽  
Fire Scene

Pre-stressed steel structures with large space are widely used in stadium, exhibition hall, theater and other buildings today. In order to study the fire-resistance behavior of suspended steel lattice shell of a stadium, the method of performance-based fire resistance design is used. First of all, the stadium physical model is established and the software FDS is used to determine the heating curves of the measuring points of the large space structure for two fire scenes. Compared with international standards heating curve, the heating curves of the large space structure obtained here has characteristic of local high-temperature. The finite element software MSC.MARC is further used to simulate the fire behavior of the pre-stressed steel structure with large space, in which the fire scene with 10MW design power of fire source and 30 minutes duration of fire are considered and two loading ways that overall non-uniform temperature field loading and the local high temperature components loading are accepted. The results show that the pre-stressed steel structure with large space has good fire resistance behavior, and the overall failure will not take place for the fire scene suggested here during 30 minutes duration of fire.

scholarly journals Calculation of fire resistance of building structures in software packages

2019 ◽  
Vol 91 ◽  
pp. 02007 ◽  
Author(s):  
Ivan Dmitriev ◽  
Vladimir Lyulikov ◽  
Olga Bazhenova ◽  
Dmitry Bayanov
Keyword(s):  
Fire Resistance ◽  
Fire Regimes ◽  
Point Of View ◽  
Temperature Fields ◽  
Software Systems ◽  
Building Structures ◽  
The Finite Element Method ◽  
Fire Load ◽  
Software Packages ◽  
Intuitive User Interface

In the article a review of modern software systems allowing calculating the distribution of temperature fields in a structure in time, without loading and with it (the fire resistance limit of structures) under conditions of a special fire load has been given. The algorithm of the finite element method is used for the calculations, on which each of the considered complexes is based. Specifically: Sofistik, Abaqus, Normcad, Ansys, Robot structure. Comparative analysis has been made from the point of view of intuitive user interface, the possibilities of modeling various conditions and fire regimes, tools for communication with other software complexes and the format of output of results. The results demonstrating the capabilities of the post-processor Sofistik have been presented.

Studies on Fire Resistance of FRP Shear Strengthened Reinforced Concrete Beams

2011 ◽  
Vol 94-96 ◽  
pp. 1318-1321
Author(s):  
He Fan ◽  
Ze Fan
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Failure Modes ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Temperature Fields ◽  
Insulation Material ◽  
Rc Beams ◽  
Fire Resistance Rating ◽  
Resistance Rating

Fire-resistance performance experiments with static loading-fire are investigated about two carbon fiber sheet (CFS) shear strengthened reinforced concrete (RC) beams exposed to the ISO834 standard fire. Shear strengthened RC beams are wrapped with fire insulation material- thick painted fire retardant coatings. Relationship between measure points’ temperature and time are achieved. The results suggest that: the ratio of shear-span is the main factor to fire-resistance rating and failure modes of CFS shear strengthened RC beams in fire; shear-failure fire-resistance rating are increased by thickening fire insulation to shear strengthened RC beams. A computer program is developed to calculate the temperature fields of fire insulated concrete beams shear strengthened with CFS coated thick fireproof material. This program is validated comparing with experimental results. Researches can give a supplement to produce overall fire-resistance factors of CFS shear strengthened reinforced concrete beams at high temperatures.

scholarly journals Fire Resistance of Composite Beams with Restrained Superposed Slabs

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Junli Lyu ◽  
Qichao Chen ◽  
Huizhong Xue ◽  
Yongyuan Cai ◽  
Jingjing Lyu ◽  
...  
Keyword(s):  
Fire Resistance ◽  
Composite Beam ◽  
Composite Beams ◽  
Thermomechanical Coupling ◽  
Temperature Fields ◽  
Steel Beams ◽  
Experiment Data ◽  
Temperature Distributions ◽  
Uniformly Distributed Loads ◽  
Deformation Recovery

To investigate the fire resistance of composite beams with restrained superposed slabs, three specimens were tested under uniformly distributed loads in a furnace. The effects of the thickness of the postcast top layer in superposed slabs and the spacing of shear studs on the structural behaviours of composite beams under fire were further examined. During the tests, the temperature distributions of the superposed slabs and steel beams as well as the displacements at their key positions were recorded and analysed. It was found that the temperature of the concrete superposed slabs decreased long their heights from the bottom. The most drastic change of the temperature along the slab cross section was found in the region with a distance of 40 mm to the slab bottom. The concrete superposed slabs could impose restraints to the steel beams due to their incompatible deformations. Cracks were developed on the top surfaces of the specimens and the superposing interfaces between the precast slabs and postcast top layers were not broken. Through the comparisons of different specimens, the spacing of shear studs could have a significant effect on the fire resistance of composite beams, especially for their deformation recovery capacities. In contrast, the effect of the thickness of the postcast top layers was negligible. ABAQUS was employed to simulate the temperature fields and deformation behaviours of composite beam specimens based on a sequenced thermomechanical coupling analysis. The numerical results agreed well with the experiment data, which validated the developed numerical model.

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