Axially loaded concrete-filled steel tubes pdf

A numerical model for considering the bondslip effect in. Axial load behaviour of concretefilled steel tubular columns. In 1967, furlong reported that if the steel tube is axially loaded, the confinement effect is. It is impossible to fully use the existing research results of axially loaded short columns with common reinforced concrete. Concrete filled steel tubes subjected to axial compression and. Experimental and numerical behaviour of eccentrically. The total 14 specimens are tested under the axial load, and. Behavior of axially loaded stirrup confinement rectangular concretefilled steel tubular stub columns jing liu,1,2 wenjun wang,1 faxing ding,1 xinfa zeng,2 zhe tan,2 yan huang,2 and baoquan wang2 1schoolofcivilengineering,centralsouthuniversity,changsha,hunanprovince410075,china. These members are ideally suited for all applications because of their effective usage of construction materials. Behavior of centrally loaded concretefilled steeltube short column.

Nonlinear analysis of axially loaded cicular concretefilled stainless steel tubular short columns abstract the experiments indicate that stainless steels in tension deform plastically more than stainless steels in compression. This article introduces a numerical model that simulates the bondslip behaviour in axially loaded circular concretefilled tube columns without applying double nodes required in the use of the classical bondlink element. The influence of confinement on axial load capacity is estimated from the results of axial compression tests conducted on twelve cold formed steel circular columns of length to diameter ratio equal to 3 and diameter to thickness ratio ranging from 33 to 63. Nonlinear analysis of axially loaded concretefilled tube columns with confinement effect, in j. A total of 42 concretefilled steel tube specimens of. This study experimentally explores the behaviour of recycled aggregate concretefilled steel tubes racfst subjected to axial compression loading. Comparison of the square and circular columns in the fire resistance shows that, for columns with the same steel and concrete crosssection areas, the circular column. Behaviour of concrete filledsteel tubes under axial load. Loadcarrying capacity of axially loaded concretefilled steel tubular columns made of thin tubes article pdf available in archives of civil and mechanical engineering 183 february 2018. Schneider 2 performs a comprehensive study about axially loaded concrete filled steel tubes. Finite element modelling for axially loaded concrete filled steel circular tubes springerlink. Research article theoretical analysis on mechanical. Theoretical analysis on mechanical behavior of axially loaded.

Nonlinear analysis of axially loaded circular concretefilled. Recent advancements in the availability of higher strength steels, better coating materials for protection and high strengthsperformance concretes have expanded the scope of concrete filled steel composite columns with wide ranging applications in. Behaviors of axially loaded square concretefilled steel tube. Concretefilledsteeltube cfst columns have been adopted due to its. Behavior of axially loaded concretefilled circular frp tubes amir z. This paper presents an experimental and analytical study on the behavior of short, concretefilled steel tube columns concentrically loaded in compression to failure.

Performance of concrete filled steel tubular columns. The confinement offered by steel tubes in concrete filled steel tubular cft columns is found to be crucial in the enhancement of structural properties of such columns. Calculating the strength of concrete filled steel tube columns of. For comparison purpose, tests were also performed on 12 normal concretefilled steel tube ncfst specimens, three steel tubes and one specimen of recycled aggregate concrete. All cfst specimens were made 2500 mm long and the steel tubes were either 2. Buckling of slender concretefilled steel tubes with compliant. Uniaxial compression test of concretefilledsteeltube. Concrete filled steel tubes cfst are composite structures of steel tube and in filled concrete.

Concretefilled steel tubes subjected to axial compression and lateral cyclic loads amir fam1, frank s. This paper presents an experimental and analytical study on the behavior of short, concrete filled steel tube columns concentrically loaded in compression to failure. This study experimentally investigated the behaviour of concrete filled steel tubes under cyclic axial compression. Twentyfour racfst specimens were tested to failure. Typically, it was used in composite frame structures. Axial behaviour of concrete filled steel tube stub. Comparative study of concrete filled steel tube columns under axial compression. This study presents a finite element analysis modelling fea for concretefilled steel circular tubes cfsct subjected to axial compressive load using the commercial fea software abaqus. Deflection calculation based on sdof method for axially. Cfst members, slender, compression, local buckling, axially loaded. Experimental study on working performance of axially.

Analysis and design of axially loaded short concrete filled steel tubes. Dec 01, 20 read behaviors of axially loaded circular concrete filled steel tube cft stub columns with notch in steel tubes, thinwalled structures on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The combination of them can significantly improve the strength of the composite structure by taking advantage of high compression resistance of concrete and high strength of steel in tension. Axial load capacity of circular steel tube columns filled with high strength concrete supervised by. In order to study the mechanical mechanism of concretefilled steel tubes cfsts under axial compression, a theoretical model for analysing the behaviour of axially loaded cfst columns is presented in this paper. Concretefilled steel tube cfst structural members have been. Theoretical analysis on mechanical behavior of axially. Structural performance of axially loaded concretefilled steel tubes with different concrete mixes.

However if the concrete core and the steel tube are loaded simultaneously the steel. Wang and kodur 2 recommended the use of such typology of columns in order to avoid. Concrete filled steel tube an overview sciencedirect. Hajjar 4 abstract this paper presents selected experimental results on 18 tests on circular and rectangular concretefilled steel tubes cft subjected to cyclic loads. Mar 03, 2016 in order to study the mechanical mechanism of concrete filled steel tubes cfsts under axial compression, a theoretical model for analysing the behaviour of axially loaded cfst columns is presente. The fire resistance of this kind of composite tubes is calculated. In current international practice, cft columns are used in the primary lateral resistance systems of both braced and unbraced building structures. Based on the mechanical model, a novel numerical program is developed. Behavior of axially loaded concrete filled circular frp tubes amir z. School of civil engineering and architecture, shandong university of science and technology, qingdao 266590, shandong, china. Different parameters such as the ratio of the axial load, the. A new mechanical model for analysing the behaviour of axially loaded recycled aggregate concrete filled steel tubes racfsts stub columns is presented in this study. To compare the experimental results of cfst with aisclrfd 2005 and eurocode4.

Behavior of concrete filled steel tube column ijedr1401056 international journal of engineering development and research. Behavior of axially loaded concretefilled circular frp tubes. Experimental behaviour of recycled aggregate concretefilled. Experimental investigation on the axially loaded performance of. The experimental results are also compared to the loads allowed by the nbc and aci and recommendations made. Experimental study on working performance of axially loaded. Experimental behaviour of recycled aggregate concrete. The results of 62 concentrically loaded scale model columns filled with high strength concrete 46100 mp a are presented. Behaviors of axially loaded circular concretefilled steel. Concretefilled steel tubes cfts are composite members consisting of an steel tube infilled with concrete. A total of 42 concrete filled steel tube specimens of two groups were tested to f. Out of the three bonded tubes, one was axially loaded on the composite section, c1, and two were axially loaded on the concrete core only, c2 and c3. Nevertheless, in real situations, imperfect interface compliance between the concrete core and the steel tube is observed especially when high axial loads are.

Rizkalla department of civil engineering, north carolina state university, raleigh, nc 276957533. Li xiaowei 1, 2, zhao junhai 1, zhu tiedong 1, wang liang 1. Concrete filled steel tubes cfts are composite members consisting of an steel tube infilled with concrete. Axially loaded concretefilled steel tubes journal of. Concretefilled steel tubular cfts columns subjected to eccentric compressive load. Axial load behaviour of concrete filled steel tubular columns. Parametric study of concrete filled steel tube column darshika k. Concretefilled steel tubular cfst support has been gradually applied in. Mechanics behavior of axially loaded short columns with concretefilled square steel tube. Read behaviors of axially loaded circular concretefilled steel tube cft stub columns with notch in steel tubes, thinwalled structures on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Parametric study of concrete filled steel tube column. Oct 11, 2019 this study presents a finite element analysis modelling fea for concrete filled steel circular tubes cfsct subjected to axial compressive load using the commercial fea software abaqus. The model is derived from the typical elastoplasticity, the nonlinear elastic mechanics, and the properties of materials. Structural performance of frames with concretefilled steel tubular. Axial and lateral stressstrain model for circular concretefilled steel tubes. Concretefilled steel tubular columns have excellent earthquake resistant properties such as high strength and ductility and large energy absorption capacity.

Jul 01, 2006 the behaviour of axially loaded square and circular concrete filled steel tube cfst columns when exposed to elevated temperatures is investigated in this paper. Mechanics behavior of axially loaded short columns with. Influence of concrete confinement on axial load capacity of. Pdf axial load behavior of stiffened concretefilled steel columns. Axial compressive behaviour of slender cfst membersanalytical. School of architectural engineering, changan university, xian 710061, shaanxi, china. This is due to their excellent structural properties, such as earthquake resistance, high strength and ductility, and large energy. Comparison of the square and circular columns in the fire resistance shows that, for columns with the same steel and concrete crosssection areas, the circular. However, section discretization is a prerequisite for fiber element modeling patel et al. Fire resistance of axially loaded concrete filled steel tube.

Experimental behaviour of concretefilled steel tubes under. Concrete filled steel tube an overview sciencedirect topics. Mechanical properties of new concretefilled steel tubular. Structural performance of axially loaded concretefilled. Lai department of civil engineering, the university of hong kong, hong kong. Pdf analysis of axially loaded concrete filled circular hollow. For concretefilled steel tubes cfst, local buckling commonly observed in bare steel columns is effectively prevented, giving a higher capacity. The present study is an investigation of the behavior of circular and square concrete filled steel tubes cfst subjected to. Finite element modelling for axially loaded concretefilled. There are changes in material properties of concrete when compared axially loaded short columns with microexpansive concrete filled steel tube with axially loaded short columns with common reinforced concrete and these changes will inevitably lead to the change of axially loaded short columns with microexpansive concrete filled steel tube in performance. Developed more than 80 years ago, the design procedure of concrete filled steel tubes cfst has several limitations that can still be found in most current international design standards.

Simplified numerical modeling of axially loaded circular concretefilled steel stub columns article pdf available in journal of structural engineering 14312 december 2017 with 915 reads. Concrete filled stainless steel tube cfsst is a composite structure that comprises both the structural steel andcore concrete. For that the specimens were axially loaded upto the failure of each specimen. An extensive experimental program was initiated to examine the axial capacity of cfsthsc columns. Fourteen specimens were tested to investigate the effect of the steel tube shape and wall thickness on the ultimate strength of the composite column. The influence of confinement on axial load capacity is estimated from the results of axial compression tests conducted on twelve cold formed steel circular columns of length to diameter ratio equal to 3 and diameter to. Fire behavior of axially loaded slender high strength concretefilled tubular columns manuel l. Pdf axial load behaviour of concretefilled steel tubular. Pdf loadcarrying capacity of axially loaded concrete. This study experimentally explores the behaviour of recycled aggregate concrete filled steel tubes racfst subjected to axial compression loading. Nonlinear analysis of axially loaded cicular concrete. For concrete filled steel tubes cfst, local buckling commonly observed in bare steel columns is effectively prevented, giving a higher capacity.

The use of concrete filled steel tubes in building construction has seen resurgencein recent years due mainly to its simple construction sequence, apart from its superiorstructural performance. Simplified numerical modeling of axially loaded circular. Studies on mechanical properties of stub columns of axial compression concrete filled circular steel tubes based on new mechanical analysis program. Pdf analysis and design of axially loaded short concrete. This study experimentally investigated the behaviour of concretefilled steel tubes under cyclic axial compression. Behavior of axially loaded stirrup confinement rectangular. Behaviors of axially loaded square concretefilled steel. Concretefilled steel tubes are very popular in structural engineering applications. Concretefilled steel tubes subjected to axial compression. Comparative study of concrete filled steel tube columns. Research article theoretical analysis on mechanical behavior. Mar 03, 2016 in order to study the mechanical mechanism of concrete filled steel tubes cfsts under axial compression, a theoretical model for analysing the behaviour of axially loaded cfst columns is presented in this paper. Studies on mechanical properties of stub columns of axial. Concretefilled steel tubular cfts columns subjected to.

Request pdf finite element modelling for axially loaded concretefilled steel circular tubes this study presents a finite element analysis modelling fea for concretefilled steel circular. For comparison purpose, tests were also performed on 12 normal concrete filled steel tube ncfst specimens, three steel tubes and one specimen of recycled aggregate concrete. Pdf axial compressive strength of short concrete filled steel tubes, cft, is at least equal to the sum of the strengths of its components. The concrete core gives thegreater contribution to resisting axial compression. Rizkalla department of civil engineering, north carolina state university, raleigh, nc 276957533 abstract this paper describes the behavior of concrete filled gla s fiber reinforced polymer gfrp tubes, under axial compression loading conditions.

Interaction strength of concretefilled steel tubes tiziano perea 1, roberto t. The model is derived from the theory of elastoplasticity, nonlinear elastic mechanics and materials properties. This study aimed to investigate the static performance of notched hexagonal concretefilled steel tube cfst stub columns through axial loading. Huang yijie 1,2, sun yuedong 1, sun huangsheng 1,2. This experimental study is carried out on the behavior of short, concrete filled steel tubular columns axially loaded in compression to failure.

A cfsst column has gained prominence from structural engineers all over the world as it providessufficient strength and durability to withstand compressive loads. Composite columns such as concretefilled steel tube cfst were adopted in. Based on numerical simulation and theoretical analysis, the impact response and deflection calculation method for axially loaded cfst members subjected to lateral impact are investigated in this paper. This article presents the experimental and finite element fe analyses of two conventional rectangular concrete filled steel tubular cft stub columns, two stiffened rectangular concrete filled steel tubular scft stub columns, and two stirrup confinement rectangular concrete filled steel tubular ccft stub columns concentrically loaded in compression to failure. This article presents the experimental and finite element fe analyses of two conventional rectangular concretefilled steel tubular cft stub columns, two stiffened rectangular concretefilled steel tubular scft stub columns, and two stirrup confinement rectangular concretefilled steel tubular ccft stub columns concentrically loaded in compression to failure. This study divided the steel tube into 16 longitudinal fiber elements, and specified 17 longitudinal material integration points for the core concrete. Fire behavior of axially loaded slender high strength. Recent advancements in the availability of higher strength steels, better coating materials for protection and high strengthsperformance concretes have expanded the scope of concrete filled steel composite columns with wide ranging applications in various structural systems with ease of construction, highly increased strengths and better performance. Finite element modelling for axially loaded concrete. A vertical compression axial loading was simultaneously applied to. Buckling of slender concretefilled steel tubes with.

Mechanics behavior of axially loaded short columns with concrete filled square steel tube. Pdf simplified numerical modeling of axially loaded. Pdf performance of concrete filled steel tubular columns. Buckling, composite column, steel tubes, concretefilled. Load testing machine was used for applying the load on the specimens. View enhanced pdf access article on wiley online library html view. Behaviors of axially loaded square concretefilled steel tube cfst stub columns with notch in steel tube.

Three dimensional confinement effect of concrete along with support provided by concrete to the thin walls of steel tube to prevent local buckling had a composite effect on the strength of the. Influence of concrete confinement on axial load capacity. Concretefilled steel tubes cfst are composite structures of steel tube and infilled concrete. Axial force has a great influence on the dynamic behavior and the impact resistance of concretefilled steel tubular cfst members. Experimental behaviour of concretefilled steel tubes. Behavior of axially loaded stirrup confinement rectangular concrete filled steel tubular stub columns jing liu,1,2 wenjun wang,1 faxing ding,1 xinfa zeng,2 zhe tan,2 yan huang,2 and baoquan wang2 1schoolofcivilengineering,centralsouthuniversity,changsha,hunanprovince410075,china. Experimental and analytical analysis of concrete filled. Nonlinear analysis of axially loaded cicular concrete filled stainless steel tubular short columns abstract the experiments indicate that stainless steels in tension deform plastically more than stainless steels in compression. Therefore, the strain hardening of stainless steels in compression is much faster than that of stainless steels in.

1144 1433 769 1430 1039 1084 314 1465 1352 897 1562 878 256 1170 1355 1333 367 883 1198 434 1240 1258 832 1348 873 290 61 1411 1039 382 251 1498 242 1559 1283 138 1292 411 182 1076 564 866 114