Structural behaviour and design of end-restrained square tubed-reinforced-concrete columns exposed to fire
نویسندگان
چکیده
Tubed-reinforced-concrete columns are gaining increasing usage in engineering practices, whereas research on their fire behaviour is still limited and mainly concentrated unrestrained columns. Since end-restrained might behave differently as compared to the columns, of square tubed-reinforced-concrete with end restraints was investigated via numerical modelling this study. The axial rotational were modelled using linear springs then validated against test results. effects failure mode, force buckling length at resistance, evolution deformations, internal bending moment during heating, systematically analysed through parametric studies. axially-restrained mostly undergo contraction only fire; typical mode uncontrolled overall deformation, except for those relatively high restraints. An increase restraint leads a nearly decrease resistance. For rotationally-restrained also deformation. As increases, bucking decreases resistance which particularly significant when low. A practical design method proposed either axial, or rotational, combined Both constant temperature-dependent have been adopted outcome that they provide very similar
منابع مشابه
Finite Element Modeling of Reinforced Concrete Beams Exposed to Fire
Abstract: The practical implementation of performance-based fire safety design of reinforced concrete (RC) structures hinges on the availability of accurate numerical simulation tools for the behavior of RC members exposed to fire. This paper presents a three-dimensional (3D) finite element (FE) model for the accurate prediction of both the thermal and the mechanical behavior of RC beams expose...
متن کاملStructural analysis of reinforced concrete chimneys subjected to uncontrolled fire
We studied the behavior and residual structural capacity of reinforced concrete chimneys subjected to an uncontrolled fire. We used a combination of a heat transfer finite element model – to obtain the temporal distributions of temperature during the fire event – and the structural model of concrete chimney design provided by the American Concrete Institute (ACI 307–08). This approach allows es...
متن کاملCyclic and Monotonic Behavior of Strengthened and Unstrengthened Square Reinforced Concrete Columns
The use of composite materials is an effective technique to enhance the capacity of reinforced concrete columns subjected to the seismic loading due to their high tensile strength. In this paper, numerical models are developed in order to predict the experimental behavior of square reinforced concrete columns strengthened by glass fiber reinforced polymer and steel bars and unstrengthened colum...
متن کاملRehabilitation of Reinforced Concrete Columns
In recent years, rehabilitation has been the subject of extensive research due to increased spending on building work and repair of built works. In all cases, it is absolutely essential to carry out methods of strengthening or repair of structural elements, and that following an inspection analysis and methodology of a correct diagnosis. The reinforced concrete columns are important elements in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Constructional Steel Research
سال: 2021
ISSN: ['0143-974X', '1873-5983']
DOI: https://doi.org/10.1016/j.jcsr.2021.106675