Research on Bearing Capacity of Axiallycompressed Short Columns

2013 ◽  
Vol 405-408 ◽  
pp. 958-963 ◽  
Author(s):  
Ying Zi Yin ◽  
Yan Zhang ◽  
Gen Tian Zhao
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structure ◽  
High Strength Concrete ◽  
High Strength ◽  
Reinforced Concrete Structure ◽  
Design Specification ◽  
Steel Reinforced Concrete ◽  
Strength Concrete ◽  
Short Columns ◽  
High Building

Abstract: Steel reinforced concrete structure (SRC) is commonly used in high building, but the research on properties of steel reinforced high strength concrete structure (HSRC) composed of high strength concrete and steel reinforced concrete is rarely carried out. In this paper, a series of problems in HSRC structure application is studied, including the steel radio, the stirrup ratio. The conclusions can be served for design specification of steel reinforced high strength concrete column

Seismic Performance of High Titanium Heavy Slag High Strength Concrete Columns

2012 ◽  
Vol 174-177 ◽  
pp. 455-459 ◽  
Author(s):  
Xiao Wei Li ◽  
Xue Wei Li ◽  
Xin Yuan
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
High Strength Concrete ◽  
Load Ratio ◽  
High Strength ◽  
Scale Model ◽  
Transverse Reinforcement ◽  
Reinforced Concrete Column ◽  
Displacement Ductility ◽  
Strength Concrete

For expedite the development of high titanium heavy slag concrete, eight high titanium heavy slag high strength reinforced concrete (HTHS-HSRC) scale model column are studied. The eight HTHS-HSRC model columns are tested under reversed horizontal force. Primary experimental parameters include axial load ratio varying from 0.3 to 0.5, volumetric ratios of transverse reinforcement ranging from 1.38% to 1.56%, strength of high titanium heavy slag high strength concrete varying from 55.9 to 61.6 N/mm2 and configurations of transverse reinforcement. It is found from the test result that HTHS-HSRC model columns provides comparable seismic performance to those usually used reinforced concrete column in terms of member ductility, hysteretic and energy dissipation capacity. Primary Factors of Displacement Ductility of Model Columns are also discussed.

Calculation of Ultimate Bearing Capacity of Prestressed Steel Reinforced Concrete Structure under Fire

2011 ◽  
Vol 250-253 ◽  
pp. 2857-2860 ◽  
Author(s):  
Yu Zhuo Wang ◽  
Chuang Guo Fu
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Fire Resistance ◽  
Concrete Structure ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Ultimate Bearing Capacity ◽  
Reinforced Concrete Structure ◽  
Steel Reinforced Concrete ◽  
Resistance Performance

Prestressed steel reinforced concrete structure, compared with other concrete structure has its unique advantages. So it is mainly used in large span and conversion layers. With the popularization of this structure,more attention should be payed on fire resistance performance. On the basis of reasonable assume,two steps model is used as concrete high strength calculation model. Simplified intensity decreased curve is used as rebar,steel and prestressed. Two ultimate bearing capacity formulas of prestressed steel reinforced concrete beam are established. One is for the beam whose tensile area is under fire, the other is for the beam whose compression area is under fire. Prestressed steel reinforced concrete structure has both prestressed concrete structure’s advantages and steel reinforced concrete structure ’s advantage. Steel reinforced concrete is used to improve the bearing capacity of the structure. Prestressed steel is used to improve the ultimate state of structure’s performance during normal use. Thereby structure’s performance is better to play. There are many similarities between prestressed steel reinforced concrete structure and steel reinforced concrete structure about fire resistance performance. Because of prestressed steel reinforced concrete structure’s own characteristics, there are still many problems about fire resistance. This paper mainly presented bending terminal bearing capacity of prestressed steel reinforced concrete beam under fire. Established simplified formulae for calculation, it is meet the engineering accuracy requirement.

Mechanical Properties of HPC and Numerical Simulation of Mine Shaft under 3D Load

2015 ◽  
Vol 777 ◽  
pp. 48-51
Author(s):  
Hui Cao ◽  
Lin Lin Jiang
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
High Strength Concrete ◽  
Effective Strain ◽  
Earth Pressure ◽  
High Strength ◽  
Wall Structure ◽  
Concrete Wall ◽  
Mine Shaft ◽  
Strength Concrete

The mechanical properties of high-strength concrete was studied in the laboratory, and obtained a high strength concrete uniaxial compressive strength changes with curing period, found that low temperature curing C100 Poisson's ratio of concrete is 0.24, and elastic modulus reached about 52.5GPa. The test results are applied to the numerical calculation, established a separate type reinforced concrete wall, and the multiaxial loading the stress state is simulated, the research shows that it is applied to C100 reinforced concrete shaft lining under its own gravity and the surrounding soil earth pressure, the maximum effective stress are respectively 25MPa , and effective strain is 4E-4mm, structure of shaft wall failure caused by shear wall structure. Under the three state of compression, the strength of concrete is improved.

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