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

Abstract

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.

Computational Method and Numerical Simulation of Temperature Field for Large-Space Steel Structures in Fire

“…The reasons are mainly as follows: (1) the smaller the heat release rate, the weaker the thrust generated by the smoke plume, which slows down the horizontal diffusion of heat and the mixture of cold and hot air. Therefore the local effect of air temperature is much more obvious; (2) in the derivation process of formula (34), the assumption of energy dissipation is ignored; therefore the result of this formula tends to be conservative.…”

“…) has been derived which can be used to predict the air temperature of large space fire that meets the criteria of (1) ceiling height greater than 10m, (2) indoor area more than 500 m 2 and (3) heat release rate greater than 5MW. The accuracy of the proposed equation was verified by comparing the results with those obtained by fire dynamic simulation software.…”

“…Nowadays, researches on temperature field model are mostly focused on indoor small space fire, while studies on large space fire are not enough. Large space fire have many different attributes and features compared to indoor small space fire such as huge volume, higher space height, full combustion, faster air flow rate, larger heat distribution gradient, obvious local effects, and further distance from structural elements to fire source (Fan et al [1]; Yu et al [2]). Therefore, there may be great differences in the temperature field model for large and small space fire.…”

“…Based on research findings by Li and Du [3], Xue et al [4], Cooper [5] and Venkatasubbaiah and Jaluria [6], there are four available methods to establish air temperature field model in fire: (1) The standard ISO834 fire, which is mainly suitable for indoor small space or compartment fire. (2) Live fire test measuring method, which is mainly applicable to indoor large space fire. However, the testing is very rather costly, and the restricted test parameters often limit their applications.…”

Scientometric Analysis for Mechanical Performance of Broken-Line Long-Span Steel Structure in Construction Considering Geometric Nonlinearity

“…Due to its good mechanical properties, a large-span spatial steel structure [1] can achieve complex structural forms and functional requirements, and have a beautiful and simple appearance. It can be used in theaters [2], gymnasiums [3,4], museums [5], exhibition halls [6], and art centers [7]. It has many applications in airport terminals [8] and industrial plants [9].…”