A theoretical and experimental study on in-plane buckling of orthotropic composite arches under an arbitrary radial point load

2020 ◽  
Vol 237 ◽  
pp. 111933 ◽  
Author(s):  
Zixiang Zhang ◽  
Airong Liu ◽  
Jie Yang ◽  
Yong-lin Pi ◽  
Yonghui Huang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Point Load ◽  
Orthotropic Composite

scholarly journals Experimental Study for Ability to Use Plaster of Pairs Instead of Normal Concrete

2018 ◽  
Vol 7 (4.20) ◽  
pp. 185
Author(s):  
Hashim Tariq Hashim ◽  
Dr. Mohammed Mosleh Salman
Keyword(s):  
Experimental Study ◽  
Point Load ◽  
Reinforcement Ratio ◽  
Curing Time ◽  
Normal Concrete ◽  
Aggregate Concrete ◽  
Plaster Of Paris ◽  
The Third ◽  
Three Samples ◽  
Structural Parts

This research investigated the possibility of using plaster of Paris instead of cement in some internal structural parts and non-exposed to moisture by casting (nine) samples divided in three group. First group was normal concrete, second was plaster of pairs concrete group and finally plaster of Paris with aggregate concrete. All of them have the same dimension (1000×150×200) mm and the same reinforcement ratio. Group one was cured with water while the rest were isolated in a place far away from the moisture. All sample designed to be failed in flexural. The process of testing was divided in two methods; for properties of material used as explain above and for samples tested under two-point load at several curing time (7,28 and 90) days.  Each period consists of three samples one from each group. The result showed that the third group (plaster of Paris with aggregate concrete) approximately closer to normal concrete in applying a load by the ratio of (98%) in 7 days, (87%) in 28 days and (94%) in 90 days. While the second group (plaster of pairs concrete) was acceptable when compared with normal concrete because of missing aggregate.  

scholarly journals Behavior of Self-Compacting Reinforced Concrete Dapped End Beams

2019 ◽  
Vol 2 (1) ◽  
pp. p33 ◽  
Author(s):  
Qasim M. Shakir ◽  
Ruqyia Alliwe
Keyword(s):  
Experimental Study ◽  
Failure Load ◽  
Precast Concrete ◽  
Single Point ◽  
Point Load ◽  
Lateral Stability ◽  
Noticeable Effect ◽  
Bridge Girder ◽  
Type Of Failure ◽  
Unusual Shape

Dapped end is an essential part of the precast concrete industry, but its unusual shape made it complex in design and sensitive to stresses. It may be needed to upgrade such elements due to errors in design; over loading or the deterioration of members due to severe environments. The concept of dapped-end beams is extensively used in precast concrete construction as buildings, parking structures, bridge girder and recently in footings. It provides better lateral stability and reduces overall height of the structure and to match with geometry of corbel or bracket. In the present work, an experimental study has been conducted to investigate of reinforced SCC dapped beams. The program consists of testing 5-specimens with dimension (200x400x1600 mm), and two values of (a/d) (1.5, 1.0) under effect of a single point load. Two of samples that have been tested have been significantly tested as controller specimens as a full reinforced., also three beams have been reduced the Hanger and Nib reinforcement. It is found that the (a/d) ratio has a noticeable effect on the behavior of dapped end beam. So, the tested control beams (full reinf.), the reduction of (a/d) from (1.5) to (1.0), due to improve the failure load by (48%) with shifted the type of failure from the diagonal at extended end to the diagonal in the re-entry corner. Also, it is found that the reduction of hanger reinf. (40%), resulted reduction of the failure (6%) for (a/d) equal 1 value, higher deflection at failure about (18%). Also, reduction of the nib reinforcement by about (50%), results reduction in capacity of the failure load by about (12%) for a/d=1.5 and (12.4%)%) for a/d=1.0.

scholarly journals Experimental study of RC beams strengthened for bending by reinforced grout layer and connectors

2018 ◽  
Vol 11 (4) ◽  
pp. 810-833
Author(s):  
J. H. CANAVAL ◽  
T. J. DA SILVA ◽  
A. C. SANTOS
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Beams ◽  
Point Load ◽  
Reinforced Concrete Beams ◽  
Bending Test ◽  
Experimental Program ◽  
Rc Beams

Abstract This work is based on an experimental investigation of reinforced concrete beams strengthened to flexure for wrapping applying a type of metallic connector in the bond substrate/groute. The experimental program consisted of 5 beams used for reference (without strengthening), 5 beams reinforced with surface brushed texture substrate and 5 beams with metal connectors bonded to the substrate. The beams were submitted to four-point load bending test. Initially with a partial loading, executed the strengthening and were finally tested until the break. The strengthening was made up by the increase by graute, on the sides and bottom of the beam and reinforcing. The applied force, the displacement, deformations in steel and in concrete were measured. The reference beams failure by flexing with the calculated charges. The bending strengthening proved efficient, increasing the bearing capacity in 44% and the failure was by shear in the stretch without strengthening. Beams with connectors the increase was higher.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An experimental study in reducing blood pressure in spontaneously hypertensive rats through extracellular signal-regulated kinase inhibition

2010 ◽  
Vol 34 (8) ◽  
pp. S31-S31
Author(s):  
Li Jing ◽  
Jian‑zhong Zhang ◽  
Jin‑ping Sun ◽  
Xin An ◽  
Feng‑ying Guo ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Experimental Study ◽  
Spontaneously Hypertensive Rats ◽  
Hypertensive Rats ◽  
Kinase Inhibition ◽  
Spontaneously Hypertensive ◽  
Extracellular Signal Regulated Kinase ◽  
Extracellular Signal

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study

Experimental study of total body washout employing extracorporeal circulation and hypothermia

1974 ◽  
Vol 126 (2) ◽  
pp. 243-248
Author(s):  
A WAKABAYASHI ◽  
T KUBO ◽  
K CHARNEY ◽  
Y NAKAMURA ◽  
J CONNOLLY
Keyword(s):  
Experimental Study ◽  
Extracorporeal Circulation ◽  
Total Body

Gastric Freezing: An Experimental Study

1963 ◽  
Vol 45 (3) ◽  
pp. 374-383 ◽  
Author(s):  
Donald C. McIlrath ◽  
George A. Hallenbeck ◽  
Hubert A. Allen ◽  
Charles V. Mann ◽  
Edward J. Baldes ◽  
...  
Keyword(s):  
Experimental Study

The Effect of Cortisone and Corticotropin on The Healing of Gastric Ulcer: An Experimental Study

1958 ◽  
Vol 34 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Henry D. Janowitz ◽  
Vernon A. Weinstein ◽  
Rhoda G. Shaer ◽  
James F. Cereghini ◽  
Franklin Hollander
Keyword(s):  
Experimental Study ◽  
Gastric Ulcer
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