Study on determination of vertical ultimate bearing capacity of pre-stressed high-strength concrete pipe-pile in a coal-fired power plant project in Southeast Asia

2021 ◽  
Author(s):  
Xiaoguang Li ◽  
Junqing Lou ◽  
Feng Shao ◽  
Kai Zhang
Keyword(s):  
Power Plant ◽  
Southeast Asia ◽  
Bearing Capacity ◽  
High Strength Concrete ◽  
High Strength ◽  
Ultimate Bearing Capacity ◽  
Pipe Pile ◽  
Strength Concrete ◽  
Concrete Pipe

scholarly journals Evaluation of Ultimate Bearing Capacity of Pre-Stressed High-Strength Concrete Pipe Pile Embedded in Saturated Sandy Soil Based on In-Situ Test

2020 ◽  
Vol 10 (18) ◽  
pp. 6269 ◽  
Author(s):  
Yingjie Wei ◽  
Duli Wang ◽  
Jiawang Li ◽  
Yuxin Jie ◽  
Zundong Ke ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
High Strength Concrete ◽  
High Strength ◽  
Ultimate Bearing Capacity ◽  
Penetration Test ◽  
Pipe Pile ◽  
Strength Concrete ◽  
Survey Report ◽  
Pile Length

Estimation of ultimate bearing capacity (UBC) of pre-stressed high-strength concrete (PHC) pipe pile is critical for optimizing pile design and construction. In this study, a standard penetration test (SPT), static cone penetration test (CPT) and static load test (SLT) were carried out to assess, determine and compare the UBC of the PHC pipe pile embedded in saturated sandy layers at different depths. The UBC was calculated with three methods including the JGJ94-2008 method, Meyerhof method and Schmertmann method based on in-situ blow count (N) of SPT (SPT-N) which was higher than the values recommended in survey report regardless of pile length. The average UBC values calculated with cone-tip resistance and sleeve friction from CPTs was also higher than the value recommended in the survey report. Moreover, the actual UBC values directly obtained by load-displacement curves from SLTs were in line with the calculated values based on in-situ SPTs and CPTs, but approximately twice as high as the values recommended in the survey report regardless of pile length. For the SPT method, the application of bentonite mud in saturated sand layers is critical for the assessment of pile capacity in the survey phase, CPTs can provide reliable results regardless of soil characteristics and groundwater if the soil layer can be penetrated, and SLTs are necessary to accurately determine the UBC in complex stratum.

Study on Seismic Performance of C105 Prestressed High Strength Concrete Hollow Pipe Pile

2020 ◽  
Vol 980 ◽  
pp. 282-290
Author(s):  
Shi Meng Wang ◽  
Xin Sheng Yin
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Prestressed Concrete ◽  
High Strength Concrete ◽  
High Strength ◽  
Vertical Load ◽  
Vertical Pressure ◽  
Pipe Pile ◽  
Strength Concrete ◽  
Concrete Pipe

Prestressed concrete pipe pile with high bearing capacity, the advantages of convenient construction, low cost and widely used in practical engineering, because of the prestressed high strength concrete in use process is in complex stress state, both are under a lot of vertical load, and horizontal seismic action needs to be considered at the same time, it is necessary under the condition of considering the vertical load bearing capacity of prestressed high strength concrete level and considering the loading level, the horizontal bearing capacity. Scholars at home and abroad based on the simple hypothesis, puts forward the calculation method of a lot of interaction with soil, in the future will be adopted in calculation, using ABAQUS finite element analysis, this paper established the three-dimensional finite element model of prestressed concrete pipe pile, respectively under different vertical pressure (P = 4000 kn, P = 4800 kn, P = 6000 kn) one-way load and calculated the horizontal bearing capacity, and under repeated load, respectively to study the size of the different vertical pressure and different reinforcement stirrup ratio on its bearing capacity and seismic performance. The results show that the stiffness of pipe pile decreases significantly with the increase of vertical pressure under different vertical loads. With the increase of vertical load, the ductility and energy dissipation capacity of the components decrease gradually. The horizontal bearing capacity of prestressed high strength concrete pipe decreases with the increase of vertical pressure. However, its amplitude decreases with the increase of vertical pressure value.

Experimental Research on Ductility and Bearing Capacity of Prestressed High Strength Concrete Pipe Piles

2013 ◽  
Vol 405-408 ◽  
pp. 2511-2514
Author(s):  
Xian Rong ◽  
Jian Xin Zhang ◽  
Yan Yan Li ◽  
Yan Feng Chen
Keyword(s):  
Bearing Capacity ◽  
Deformation Behavior ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
High Strength ◽  
Hysteretic Behavior ◽  
Strength Concrete ◽  
Concrete Pipe ◽  
Low Cyclic Loading ◽  
Damage Characteristic

Based on the low cyclic loading experiments on prestressed high strength concrete pipe piles, in which one of them was reinforced by steel fiber, another stirrup ratio, the other was not reinforced, the authors compare the results in terms of damage characteristic, hysteretic curve, bearing capacity, displacement and ductility. It is shown that the bearing capacity and ductility of prestressed high strength concrete pipe piles reinforced by steel fiber increases. With the increase of stirrup ratio, the hysteretic behavior and the deformation behavior of prestressed high strength concrete pipe piles improves.

scholarly journals Use of the Gene-Expression Programming Equation and FEM for the High-Strength CFST Columns

2021 ◽  
Vol 11 (21) ◽  
pp. 10468
Author(s):  
Huanjun Jiang ◽  
Ahmed Salih Mohammed ◽  
Reza Andasht Kazeroon ◽  
Payam Sarir
Keyword(s):  
Gene Expression ◽  
Bearing Capacity ◽  
High Strength Concrete ◽  
Gene Expression Programming ◽  
High Strength ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Quick Method ◽  
Strength Concrete ◽  
Cfst Columns

The ultimate strength of composite columns is a significant factor for engineers and, therefore, finding a trustworthy and quick method to predict it with a good accuracy is very important. In the previous studies, the gene expression programming (GEP), as a new methodology, was trained and tested for a number of concrete-filled steel tube (CFST) samples and a GEP-based equation was proposed to estimate the ultimate bearing capacity of the CFST columns. In this study, however, the equation is considered to be validated for its results, and to ensure it is clearly capable of predicting the ultimate bearing capacity of the columns with high-strength concrete. Therefore, 32 samples with high-strength concrete were considered and they were modelled using the finite element method (FEM). The ultimate bearing capacity was obtained by FEM, and was compared with the results achieved from the GEP equation, and both were compared to the respective experimental results. It was evident from the results that the majority of values obtained from GEP were closer to the real experimental data than those obtained from FEM. This demonstrates the accuracy of the predictive equation obtained from GEP for these types of CFST column.

Application Research of Prestressed High Strength Concrete Pipe Pile in Construction

2012 ◽  
Vol 193-194 ◽  
pp. 1393-1396
Author(s):  
Zhi Peng Wu ◽  
Xue Dong Yang ◽  
Lei Bao
Keyword(s):  
Prestressed Concrete ◽  
High Strength Concrete ◽  
High Strength ◽  
Application Research ◽  
Pipe Pile ◽  
Strength Concrete ◽  
Concrete Pipe ◽  
Concrete Pile ◽  
New Type ◽  
Existence Question

Prestressed high strength concrete pipe pile (PHC pile), a new type of pile, due to outstanding performance, widely used in various aspects of national construction, this paper introduces the development situation of prestress high strength concrete pile in our country, aiming at proposing own opinion in existence question in the construction process of high strength prestressed concrete pipe pile.

Bestimmung der Dauerhaftigkeit von Hochleistungsbeton mit Hilfe des CDF-Tests / Determination of the durability of high performance concrete by means of CDF-test

1999 ◽  
Vol 5 (1) ◽  
pp. 29-40
Author(s):  
R. Krumbach ◽  
U. Schmelter ◽  
K. Seyfarth
Keyword(s):  
Frost Resistance ◽  
High Strength Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Factors Influencing

Abstract Variable obsen>ations concerning frost resistance of high performance concrete have been made. The question arises which are the decisive factors influencing durability under the action of frost and de-icing salt. The proposed experiments are to be carried out in cooperation with F.A.- Finger - Institute of Bauhaus University Weimar. The aim of this study is to determine possible change of durability of high strength concrete, and to investigate the origin thereof. Measures to reduce the risk of reduced durability have to be found.

Finite Element Simulation on Behavior of the High-Strength Concrete Filled High-Strength Square Steel Tube Middle-Long Columns under Axial Compressive Load

2014 ◽  
Vol 578-579 ◽  
pp. 340-345
Author(s):  
Guo Chang Li ◽  
Bo Wen Zhu ◽  
Yu Liu
Keyword(s):  
Bearing Capacity ◽  
High Strength Concrete ◽  
Slenderness Ratio ◽  
High Strength ◽  
Steel Tube ◽  
New Combination ◽  
Length Variation ◽  
Compression Process ◽  
Strength Concrete ◽  
Square Steel Tube

In this paper, using ABAQUS, 16 high-strength concrete filled high-strength square steel tube middle-long columns’ axial compression process were simulated. The load-deflection relationships were obtained and the new combination in improving the bearing capacity and plastic deformation has a great advantage. Realization of length variation slenderness ratio by changing the length of column, this paper also study the influence of slenderness ratio, the main parameters of the high-strength concrete filled high-strength square steel tube middle-long column. It is found that both bearing capacity and the plastic capacity are associated with slenderness ratio.

scholarly journals Steel Plate Cold-Rolled Section Steel Embedded High-Strength Concrete Low-Rise Shear Wall Seismic Performance

2018 ◽  
Vol 2018 ◽  
pp. 1-18
Author(s):  
Min Gan ◽  
Yu Yu ◽  
Liren Li ◽  
Xisheng Lu
Keyword(s):  
Bearing Capacity ◽  
Failure Mode ◽  
Seismic Performance ◽  
High Strength Concrete ◽  
Steel Plate ◽  
Shear Walls ◽  
High Strength ◽  
Shear Wall ◽  
Steel Plates ◽  
Strength Concrete

Four test pieces with different steel plate center-to-center distances and reinforcement ratios are subjected to low-cycle repeat quasistatic loading to optimize properties as failure mode, hysteretic curve, skeleton curve, energy dissipation parameters, strength parameters, and seismic performance of high-strength concrete low-rise shear walls. The embedded steel plates are shown to effectively restrict wall crack propagation, enhance the overall steel ratio, and improve the failure mode of the wall while reducing the degree of brittle failure. Under the same conditions, increasing the spacing between the steel plates in the steel plate concrete shear wall can effectively preserve the horizontal bearing capacity of the shear wall under an ultimate load. The embedded steel plates perform better than concealed bracing in delaying stiffness degeneration in the low-rise shear walls, thus safeguarding their long-term bearing capacity. The results presented here may provide a workable basis for shear wall design optimization.

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