An Improved Technique of Calculating Deflections of Flexural Reinforced Concrete Elements Made of Conventional and High-Strength Concrete

In resent years several attempts were undertaken to repair damaged reinforced concrete structures. Studies on the effectiveness of repaired and strengthened reinforced concrete elements which fail primarily due to formation of major flexural cracks are same what limited for normal strength concrete (NSC) and very limited for high strength concrete (HSC). The overall objective of the present work is to investigate the strength and deformation characteristics in flexure of reinforced HSC and NSC beams repaired with either with concrete alone or with fiber reinforced concrete or with Welded Wire Mesh (W.W.M). From the results obtained, it was found that the beams were adequately repaired and the general mode of failure was flexural. The repaired beams had higher strength than the original beams. All repaired beams exhibited significant decrease in deflection than the original beams.

Download Full-text

Seismic Performance of High Titanium Heavy Slag High Strength Concrete Columns

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.174-177.455 ◽

2012 ◽

Vol 174-177 ◽

pp. 455-459 ◽

Cited By ~ 1

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.

Download Full-text

An Experimental Study On Spalling Of High Strength Concrete Elements Under Fire Attack

Fire Safety Science ◽

10.3801/iafss.fss.6-855 ◽

2000 ◽

Vol 6 ◽

pp. 855-866 ◽

Cited By ~ 6

Author(s):

T. Morita ◽

A. Nishida ◽

N. Yarnazaki ◽

U. Schneider ◽

U. Diederichs

Keyword(s):

Experimental Study ◽

High Strength Concrete ◽

High Strength ◽

Strength Concrete ◽

Concrete Elements

Download Full-text

Experimental Results from Laboratory Tests on an 8 Metre Beam Manufactured from Hybrid Composite Fromwork

Advanced Composites Letters ◽

10.1177/096369359800700601 ◽

1998 ◽

Vol 7 (6) ◽

pp. 096369359800700 ◽

Cited By ~ 1

Author(s):

E. Gutiérrez ◽

G. Di Salvo ◽

J.M. Mieres ◽

L. Mogensen ◽

E. Shahidi ◽

...

Keyword(s):

Reinforced Concrete ◽

Carbon Fibre ◽

Hybrid Composite ◽

High Strength Concrete ◽

Laboratory Tests ◽

High Strength ◽

Experimental Tests ◽

Experimental Results ◽

Glass Carbon ◽

Concrete Elements

In this paper we outline the development of an all-in-one composite reinforcing formwork system for manufacturing reinforced concrete elements, in particular, we describe the main experimental tests carried out on an 8 metre beam using high strength concrete poured and bonded on a hybrid, glass/carbon fibre formwork.

Download Full-text

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.777.48 ◽

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.

Download Full-text