Abstract:Steel-reinforced concrete-filled steel tubular (SRCFST) columns have a great development prospect in engineering practice due to their high load-bearing capacity, good ductility, and energy consumption capacity. This paper established the post-fire seismic analysis model of SRCFST with a circular-cased H section using the sequential coupled thermal-stress method by ABAQUS. The P-Δ curve, stiffness, ductility, and energy dissipation were calculated. Then, the post-fire seismic performance of CFST members was co… Show more
“…The strength of the tubular itself is estimated [10], after the energy, internal pressure in the currentcarrying system, and pressure protection in the tubular have been computed [11]. Finite element analysis (FEA) was used to analyze the tubular construction's strength [12] using Cosmosworks-Solidworks software from Dassault Systemes France [13].…”
Section: Strength Of Hv Tubular Constructionmentioning
The power transformer is an essential part of the electrical distribution system because it must be reliable and safe from fire and explosions, one of which is brought on by internal oil arching that results in overheating. In general, on the high voltage side of the transformer, there are power transformers fitted with tubular oil to oil cable boxes for the demands of the client. The tubular oil to oil cable box is installed to reduce space in substations with limited space as well as to boost safety against weather and pollution at the high voltage terminal section of power transformers. The goal of this investigation is to determine the cause of an explosion that occurred in a tubular oil-to-oil cable box on the high voltage side of a Gas Insulation System (GIS) type power transformer with a power of 60 MVA and a voltage rating of 150/20 kV. For all parties involved, this incident will serve as a lesson about what to avoid doing in the future with similar power transformers. In this study, we will use a qualitative method with Finite Element Analysis (FEA), which takes samples and data of a Gas Insulation System (GIS) power transformer on the high voltage side, especially in the analysis of tubular strength. This power transformer has a voltage rating of 150/20 kV and a power of 60 MVA. Applying normal pressure to a pressure that could harm the tubular oil to oil cable box can prevent damage. The tubular oil to oil cable box is built of SS400 material and has an 8mm thickness so that it can be determined how robust it is.
“…The strength of the tubular itself is estimated [10], after the energy, internal pressure in the currentcarrying system, and pressure protection in the tubular have been computed [11]. Finite element analysis (FEA) was used to analyze the tubular construction's strength [12] using Cosmosworks-Solidworks software from Dassault Systemes France [13].…”
Section: Strength Of Hv Tubular Constructionmentioning
The power transformer is an essential part of the electrical distribution system because it must be reliable and safe from fire and explosions, one of which is brought on by internal oil arching that results in overheating. In general, on the high voltage side of the transformer, there are power transformers fitted with tubular oil to oil cable boxes for the demands of the client. The tubular oil to oil cable box is installed to reduce space in substations with limited space as well as to boost safety against weather and pollution at the high voltage terminal section of power transformers. The goal of this investigation is to determine the cause of an explosion that occurred in a tubular oil-to-oil cable box on the high voltage side of a Gas Insulation System (GIS) type power transformer with a power of 60 MVA and a voltage rating of 150/20 kV. For all parties involved, this incident will serve as a lesson about what to avoid doing in the future with similar power transformers. In this study, we will use a qualitative method with Finite Element Analysis (FEA), which takes samples and data of a Gas Insulation System (GIS) power transformer on the high voltage side, especially in the analysis of tubular strength. This power transformer has a voltage rating of 150/20 kV and a power of 60 MVA. Applying normal pressure to a pressure that could harm the tubular oil to oil cable box can prevent damage. The tubular oil to oil cable box is built of SS400 material and has an 8mm thickness so that it can be determined how robust it is.
“…The residual bearing capacity of SRCFST was also numerically calculated 26 after an ISO-834 standard fire, and they also proposed a formula for predicting the residual strength index of square internal matched section steel and steel tube concrete columns under various fire exposure techniques. The post-fire seismic performance of SRCFST was researched by Han et al 27 , and they discovered the SRCFST members performed better seismically than regular CFST members subjected to fire. Figure 1 Cross-sectional shapes of SRCFST.…”
In actual engineering, non-uniform fire boundary circumstances including single-sided fire, neighboring or related two-sided fire, and three-sided fire, are created due to the varying placements of the columns. In this paper, the seismic performance of SRCFST members subjected to non-uniform fire was investigated by the method of finite element simulation. First of all, the P-Δ curve, ductility coefficient, stiffness, and energy dissipation of the members following non-uniform fire were investigated. As the number of fire surfaces decreases, the maximum overfire temperature at the center of the section decreases, damage decreases, stiffness degradation decreases, and energy dissipation capacity increases. Next, the load distribution of each component in the SRCFST member was calculated using a three-sided fire as an example, the results show that steel tubes play the most dominant role in the seismic performance after fire, followed by steel sections and concrete the least. Last, a parametric study of the key variables influencing the ductility coefficient was carried out.
“…Earthquake damage mainly originates from the destruction and collapse of buildings and structures, and strong earthquakes and their ground motions are highly uncertain, and structures may experience expected earthquakes of average intensity or very strong unexpected earthquakes during their service life [1][2][3]. The former has a certain probability of occurrence but is incidental compared to other kinds of service loads, while the latter has a much smaller probability of occurrence during the service life of the structure [4][5][6].…”
The seismic response of a typical vertical light industrial building structure is complex, and once damage occurs, it will cause great disasters and losses, so it is very important to evaluate the seismic performance of vertical light industrial building structures. This paper firstly analyzes the IDA principle and determines the ground shaking strength index and structural damage index based on the IDA curve. Secondly, the structural vulnerability curve and the model are derived based on typical vertical light industrial structures, and the structural characteristics of typical vertical light industrial buildings are analyzed. Finally, the seismic performance of the building structure is evaluated and analyzed based on the IDA method, and the seismic vulnerability analysis is carried out for vertical light industrial buildings with different concrete structures. The PA values of CFST structures in four limit states are 0.81g, 0.21g, 0.34g and 0.47g, which are slightly higher than those of RC structures and have better seismic performance.
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