Research Advances in Concrete Filled Steel Tube Connection Device

2015 ◽  
Vol 744-746 ◽  
pp. 230-234
Author(s):  
Hong Wei Ren ◽  
Jie Fang Tian ◽  
Qiu Ming Li
Keyword(s):  
Composite Structure ◽  
International Research ◽  
Steel Tube ◽  
Current Situation ◽  
Bridge Structure ◽  
Concrete Filled Steel Tube ◽  
High Rise ◽  
Advantages And Disadvantages ◽  
New Type ◽  
Theory And Experiment

Concrete filled steel tubular structure is a new type of composite structure, widely used in monolayer or multilayer industrial workshop structure column, frame column, all kinds of equipment support and super high-rise building and bridge structure, connection pipe attracted more research on its theory and experiment at home and abroad on the concrete force has carried on the preliminary summary, analysis of the advantages and disadvantages of concrete filled steel tube of various existing connection mode, and illustrates the current situation of domestic and international research on concrete filled steel tube are connected, and finally puts forward some problems in the study.

Stress Performance Analysis on New Type of Concrete-Filled Steel Tube Pre-Stressed Truss Continuous Beam Bridge

2012 ◽  
Vol 271-272 ◽  
pp. 1415-1420
Author(s):  
Xiao Hui Yuan ◽  
Zhe An Lu
Keyword(s):  
Composite Structure ◽  
Mechanical Performance ◽  
Steel Tube ◽  
Construction Process ◽  
Concrete Filled Steel Tube ◽  
Continuous Beam Bridge ◽  
Calculation Results ◽  
New Type ◽  
Joint Section ◽  
Beam Bridge

This paper takes the construction of Gan Hai-zi concrete-filled steel tube pre-stressed continuous truss Beam Bridge as the engineering background. Combined with the actual construction process of the bridge, taken the main structure of the bridge as the typical prestressed composite structure and used the finite element joint section to simulation the whole construction process of the 35th and 36th experimental cross composite structure of the bridge. Theoretical analysis combined with the field test, and the calculation results are in good agreement with the experimental results，which shows that the construction mechanical performance of the new bridge structure is good.

scholarly journals Concrete-encased CFST structures: behaviour and application

2018 ◽  
Author(s):  
Lin-Hai Han ◽  
Dan-Yang Ma ◽  
Kan Zhou
Keyword(s):  
Fire Resistance ◽  
Composite Structure ◽  
Dynamic Performance ◽  
Steel Tube ◽  
Major Research ◽  
Bond Performance ◽  
High Rise ◽  
Static Performance ◽  
Research Findings ◽  
Subway Stations

Concrete-encased CFST (concrete-filled steel tube) is a kind of composite structure comprised of a CFST component and a reinforced concrete (RC) component. The concrete encased CFST possesses superior ductility and higher stiffness. They are gaining popularity in high-rise buildings, large-span structures, bridges, subway stations and workshops. This paper initially reviews the recent research on concrete-encased CFST structures. The major research findings on bond performance, static performance, dynamic performance and fire resistance are presented. This paper also outlines some construction considerations, such as the utilization of materials, the fabrication of the steel tube, and the methods of casting the inner and outer concrete. Finally, some typical practical projects utilizing concrete-encased CFST members are presented and reviewed.

Construction Technology of Concrete Filled Steel Tubular in Shenyang Wanxin Building

2012 ◽  
Vol 170-173 ◽  
pp. 3266-3269
Author(s):  
Su Hua Yin ◽  
Ying Na Dong
Keyword(s):  
Structural Characteristics ◽  
Steel Structure ◽  
Steel Tube ◽  
Building Construction ◽  
Construction Technology ◽  
Concrete Construction ◽  
Concrete Filled Steel Tube ◽  
High Rise ◽  
Concrete Pumping ◽  
Selection Of

Concrete filled steel tube is widely used in super high-rise steel structure, but there are many problem in the construction of concrete filled steel tube. With the construction of Wanxin building as an example, this paper described the selection of the construction program, and analyzed the disadvantages in construction such as the difficulties of concrete pumping and the problems of pipe blockage, pipe explosion and concrete curing during the process of construction. Based on structural characteristics and construction difficulties, the key technique of steel tube concrete construction are introduced in detail. It can provide significant reference and guide for super high-rise building construction.

A Kind of New Type Composite Structure Column of Research

2013 ◽  
Vol 634-638 ◽  
pp. 2653-2656
Author(s):  
Bao Chu Yu ◽  
Hong Bai Gai ◽  
Yun Yu Li
Keyword(s):  
Composite Structure ◽  
Concrete Structure ◽  
Steel Tube ◽  
Confined Concrete ◽  
Composite Pipe ◽  
New Type ◽  
Steel Composite ◽  
Structure Engineering ◽  
Development Prospects ◽  
Type Composite

Steel tube confined concrete structure and FRP-confined concrete structure were researched and widely applied in structure engineering current years. Based on the advantage and disadvantage of the two types of structure, a new type of structure named FRP-steel composite pipe confined concrete is proposed. Moreover, the feasible and advantageous about the application of this new type in structure engineering is stated. The development prospects of this new type of structure are mentioned as well.

scholarly journals Investigation of the effect of impact load on concrete-filled steel tube columns under fire

2020 ◽  
Vol 14 (54) ◽  
pp. 317-324
Author(s):  
Ali Golsoorat Pahlaviani ◽  
Ali Mohammad Rousta ◽  
Peyman Beiranvand
Keyword(s):  
Impact Load ◽  
High Strength ◽  
Concrete Columns ◽  
Steel Tube ◽  
Lateral Impact ◽  
Concrete Filled Steel Tube ◽  
Axial Strength ◽  
High Rise ◽  
Working Space ◽  
Cfst Columns

Concrete-filled steel tube (CFST) columns are increasingly used in the construction of high-rise buildings which require high strength and large working space especially at lower stories. As compared to reinforced concrete columns, existence of the exterior steel tube not only bears a portion of axial load but also most importantly provides confinement to the infill concrete.with the confinement provided by the steel tube, axial strength of the infill concrete can be largely enhanced.this paper presents the investigation effect of impact load on concrete-filled steel tube columns under fire by numerical simulations using ABAQUS software.the results indicate that the CFST sections with larger confinement factor ξ=1.23 behaved in a very ductile manner under lateral impact. And the sections with smaller confinement factor ξ=0.44  generally behaved in a brittle mechanism.

Dynamic performance of a concrete-filled steel tube high-pier curved continuous truss girder bridge due to moving vehicles

2018 ◽  
Vol 22 (6) ◽  
pp. 1297-1311
Author(s):  
Yan Li ◽  
Xiaolong Ma ◽  
Wei Zhang
Keyword(s):  
Ride Comfort ◽  
Dynamic Performance ◽  
Simulation Method ◽  
Steel Tube ◽  
Impact Factors ◽  
Analysis Model ◽  
Concrete Filled Steel Tube ◽  
Moving Vehicles ◽  
New Type ◽  
High Pier

The dynamic performance of a new type of concrete-filled steel tube high-pier curved continuous truss girder bridges under moving vehicles is studied combining field testing and numerical simulation method by an actual bridge example. The dynamic response data were obtained before opening to traffic for the bridge under moving testing vehicles. A three-dimensional vehicle and bridge coupled vibration analysis model for curved bridges is proposed and validated. The dynamic behavior characteristics and vehicular ride comfort for this new type bridge are studied considering variable road surface and other conditions. The results indicate that the dynamic impacts of this bridge from vehicles are underestimated compared with those defined in the design code. In addition, the dynamic impact factors vary significantly for the local components and some of them could exceed the design value. Finally, the riding comfort of this bridge is evaluated, which suggests a fairly uncomfortable condition.

Measurement Analysis of Mechanical Properties of Round-Ended Concrete Filled Steel Tube Coupled Tower Column during Construction Phase

2014 ◽  
Vol 638-640 ◽  
pp. 140-144 ◽  
Author(s):  
Wen Feng Chen ◽  
Bin Li ◽  
Yan Li
Keyword(s):  
Real Time ◽  
Composite Structures ◽  
Design Theory ◽  
Engineering Application ◽  
Steel Tube ◽  
Theoretical Research ◽  
Stress Monitoring ◽  
Concrete Filled Steel Tube ◽  
High Rise ◽  
High Rise Building

Steel-concrete composite structures are widely used in large-span spatial structures, high-rise building, super high-rise building and bridges and so on thanks to its advantages in terms of mechanical and construction properties. And the corresponding design codes on circular, square and polygonal concrete filled steel tube (CFST) have been formed at home and abroad. However, application of round-ended CFST is still very rare in the world and there is no corresponding theoretical research findings and design basis. There is an actual project that a round-ended CFST coupled tower column is applied in Houhu Bridge in Huangpi area, Wuhan city. Real-time stresses of the coupled tower column were monitored throughout construction phase to ensure that the force and linearity of Houhu Bridge can meet its design requirements. In the paper, the real-time stress monitoring data is analyzed so as to find force state and force characteristics of this new structure of round-ended CFST during construction phase. This study provides basic information for further formation of round-ended CFST design theory in future which plays an important role in engineering application of the round-ended CFST.

Research on Machanical Behavior of T-Shaped Concrete-Filled Steel Tubular Stub Columns with Steel Bone

2013 ◽  
Vol 639-640 ◽  
pp. 1077-1082
Author(s):  
Kai Lin Ju ◽  
Qiu Sheng Li ◽  
Guo Feng Du ◽  
Yi Li
Keyword(s):  
Local Buckling ◽  
Steel Tube ◽  
Experimental Results ◽  
Concrete Core ◽  
Concrete Filled Steel Tube ◽  
Tubular Columns ◽  
Calculation Results ◽  
New Type ◽  
Stub Columns ◽  
Tube Structure

Concrete-filled steel tube structure is one of the important load-bearing systems of modern high-rise building.The research indicate that concrete-filled steel tube structure has a good static and seismic performance,and concrete-filled steel tubular component is always used as axial compression and compression-bending component.However,what about the mechanical behavior of this combinational structure (concrete-filled steel tubular columns with steel bone built-in)? So there is a new type of special-shaped cross-section of composite structure,that is the T-shaped concrete-filled steel tubular columns with steel bone.The research about this structure is less throughout domestic and foreign.So the axial compressive experiments of six T-shaped concrete-filled steel tubular stub columns, five with and one without steel bone, were carried out. The effects of tube confining factor, bone indicator on the axial compressive behavior of the columns are analyzed. Experimental results indicate that the ultimate strength of the T-shaped steel tubular stub columns with steel bone increases, can be increased by 71.7%.And that the setting of steel bone improves the confinement of the concrete core, delays or even avoids the local buckling of the steel tube before the stress attains the yield strength. The ductility of the columns is also greatly increased.And at last in this paper, use of static equilibrium conditions and limit yield conditions,and in reference to literature[1],the calculation equation of compression capacity of this combinational column is derived.Moreover,calculation results according to the formula in this paper are in good agreement with the experimental results. The conclusions might be used as reference to structural design and plan.

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