scholarly journals Performance of fibre-reinforced high-strength concrete with steel sandwich composite panels under static loading

2015 ◽  
Author(s):  
C. Abraham
Keyword(s):  
Static Loading ◽  
High Strength Concrete ◽  
High Strength ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Strength Concrete

Field study of residual forces developed in pre-stressed high-strength concrete (PHC) pipe piles

2016 ◽  
Vol 53 (4) ◽  
pp. 696-707 ◽  
Author(s):  
Hai-lei Kou ◽  
Jian Chu ◽  
Wei Guo ◽  
Ming-yi Zhang
Keyword(s):  
Static Loading ◽  
High Strength Concrete ◽  
Large Scale ◽  
Load Transfer ◽  
High Strength ◽  
Neutral Plane ◽  
Shaft Resistance ◽  
Strength Concrete ◽  
Loading Tests ◽  
Residual Force

A large-scale field testing program for the study of residual forces in pre-stressed high-strength concrete (PHC) pipe piles is presented in this paper. Five open-ended PHC pipe piles with 13 or 18 m in embedded length were installed and used for static loading tests at a building site in Hangzhou, China. All the piles were instrumented with fiber Bragg grating (FBG) strain gauges. The residual forces in these piles were recorded during and after installation. The measured load transfer data along a pile during the static loading tests are reported. The effect of the residual force on the interpretation of the load transfer behavior is discussed. The field data show that residual force along the installed pile increases approximately exponentially to the neutral plane and then reduces towards the toe. The residual force decreases with time to a stable value after pile jacking due to the secondary interaction between the pile and the disturbed soil around the pile and other factors. The large residual forces along the PHC pipe piles significantly affect the evaluation of the pile load distributions, and thus the shaft and toe resistances. The conventional bearing capacity theory tends to overestimate the shaft resistance at positions above the neutral plane and underestimate the shaft resistance at positions below the neutral plane, and the toe resistance for an open-ended PHC pipe piles founded in stratified soils.

Post-fatigue properties of high-strength concrete subjected to coupled 3D fatigue-static loading

2021 ◽  
Vol 306 ◽  
pp. 124879
Author(s):  
Fujian Yang ◽  
Dawei Hu ◽  
Hui Zhou ◽  
Mao Teng ◽  
Meili Lan ◽  
...  
Keyword(s):  
Static Loading ◽  
High Strength Concrete ◽  
High Strength ◽  
Fatigue Properties ◽  
Strength Concrete

scholarly journals Field Performance of Open-Ended Prestressed High-Strength Concrete Pipe Piles Jacked into Clay

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4216 ◽  
Author(s):  
Hai-Lei Kou ◽  
Wen-Zhou Diao ◽  
Tao Liu ◽  
Dan-Liang Yang ◽  
Suksun Horpibulsuk
Keyword(s):  
Bearing Capacity ◽  
Static Loading ◽  
High Strength Concrete ◽  
Field Tests ◽  
Field Performance ◽  
High Strength ◽  
Loading Test ◽  
Strength Concrete ◽  
Axial Forces ◽  
Static Loading Test

The behavior of open-ended pipe piles is different from that of closed-ended pipe piles due to the soil plugging effect. In this study, a series of field tests were conducted to investigate the behavior of open-ended prestressed high-strength concrete (PHC) pipe piles installed into clay. Two open-ended PHC pipe piles were instrumented with Fiber Bragg Grating (FBG) sensors and jacked into clay for subsequent static loading tests. Soil plug length of the test piles was continuously measured during installation, allowing for calculation of the incremental filling ratio. The recorded data in static loading test were reported and analyzed. The distribution of residual forces after installation and the effect on the bearing capacity were also discussed in detail. The test piles were observed to be in partially plugged condition during installation. The measured ultimate shaft resistance and total resistance of the test piles were 639 and 1180 kN, respectively. The residual forces locked in the test piles after installation significantly affected the evaluation of the axial forces, and thus the shaft and end resistances. It tended to underestimate the end resistances and overestimate the shaft resistances if the residual forces were not considered in the loading test. However, the residual forces did not affect the total bearing capacity of open-ended PHC pipe piles in this study.

Study on Strength Development of High Strength Concrete Containing Alccofine and Fly-Ash

2012 ◽  
Vol 2 (3) ◽  
pp. 102-104 ◽  
Author(s):  
Suthar Sunil B ◽  
◽  
Dr. (Smt.) B. K. Shah Dr. (Smt.) B. K. Shah
Keyword(s):  
Fly Ash ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Development ◽  
Strength Concrete

Applications of High Strength Concrete for Highway Bridges

PCI Journal ◽  
1984 ◽  
Vol 29 (3) ◽  
pp. 44-73 ◽  
Author(s):  
Harold J. Jobse ◽  
Saad E. Moustafa
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Highway Bridges ◽  
Strength Concrete
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