Study on fire resistance of a prefabricated reinforced concrete frame structure

Abstract

Purpose This study aims to further study the fire resistance of prefabricated concrete beam-column joints with end-plate connection. This paper aims to analyze the fire resistance of this joint in prefabricated reinforced concrete frame structure (PRCS). Design/methodology/approach First, the accuracy of the model is verified by using the test data. Based on this, a refined finite element model of PRCS structure with two stories and two spans is established. The influence of four working conditions with different fire floors (positions) and different axial compression ratios on the deformation, failure and fire resistance of PRCS structure are analyzed. Findings The results show that under the four working conditions, the fire resistance of the PRCS structure under Condition 1 and Condition 2 is smaller. It shows that the beam deformation develops slowly in PRCS structure under four kinds of fire positions, and the large displacement emerges 60 min later, which is poles apart from that of prefabricated beam column members. With the increase of the fire time, the material is damaged and deteriorated, which leads to the eccentricity of the axial load, so that the column top appears large lateral displacement. Under the Conditions 1 and 3, the lateral displacement of the column gradually decreases as the axial compression ratio rises. Originality/value It is found that there is a distinct lack of researching on the fire resistance of prefabricated joints, and the existed research studies are limited to the fire resistance of members. Thus, it is necessary to strengthen the first floor and side column design of prefabricated frame structure.

Assessment of fire resistance of fireproof reinforced concrete structures

“…The results of the assessment of the fire resistance of precast concrete beams-columns, which are connected at the ends with reinforced concrete slabs and combined into a precast concrete frame structure, are presented in [12]. To verify the accuracy of the constructed model, only a computational experiment was used in assessing the fire resistance of the structures under consideration but without a fire protection system.…”

Research of Fire Resistance of Fire Protected Reinforced Concrete Structures

“…In [9] the analysis of fire resistance of prefabricated reinforced concrete beams-columns, which are connected at the ends with reinforced concrete slabs and combined into a prefabricated reinforced concrete frame structure. The accuracy of the created model was checked only by means of computational experiment without check with experimental data.…”

Analysis of a Fire in an Apartment of Timber Building Depending on the Ventilation Parameter

“…Dynamic fire simulations are closest to the real course of the fire with optimally selected parameters of the fire load environment, including the source of fire initiation. [14,15]. Some attempts to directly compare results from different models are available in the literature [16 -18].…”