Analysis the Influence of Non-Prestressed Reinforcement for Horizontal Bearing Capacity of PHC Pipe Pile

2014 ◽  
Vol 919-921 ◽  
pp. 649-653
Author(s):  
Pei Sheng Xi ◽  
Xiao Kai Sun
Keyword(s):  
Bearing Capacity ◽  
Poor Performance ◽  
Analysis Software ◽  
Element Analysis ◽  
Prestressing Steel ◽  
Concrete Piles ◽  
The Poor ◽  
Concrete Pile ◽  
Prestressed Reinforcement ◽  
Better Than

We analyze the configuration of the non-pretressed reinforcement impact on the level of bearing capacity of PHC piles to effectively solve the poor performance of the general bending of pretressed concrete pile,using ANSYS finite element analysis software,through configurating the pretressed concrete pile with appropriate amount of ordinary non-presressed reinforcement.The results of numerical calculation show that the performance of PHC pile bending has been greatly improved and the deflection and bending when cracking were significantly better than ordinary PHC pile with the confiuration of non-prestressed reinforcement. We also analyze the effect of non-prestressed reinforcement and prestressing steel when the concrete piles cracking,datd shows that prestressing steel reached stress yielding firstly.The results provide a theoretical basis of the application of precast piles in the foudation ditch support project.

scholarly journals Experimental Study on Hysteretic Behavior of the Overlapped K-Joints with Concrete Filled in Chord

2019 ◽  
Vol 9 (7) ◽  
pp. 1456 ◽  
Author(s):  
Wenwei Yang ◽  
Ruhao Yan ◽  
Yaqi Suo ◽  
Guoqing Zhang ◽  
Bo Huang
Keyword(s):  
Plastic Deformation ◽  
Energy Dissipation ◽  
Cyclic Loading ◽  
Bearing Capacity ◽  
Failure Modes ◽  
The United States ◽  
Hysteretic Behavior ◽  
Tensile Failure ◽  
Element Analysis ◽  
Better Than

Due to the insufficient radial stiffness of the steel tube, the cracking of the weld and the plastic deformation of the string often occur under the cyclic loading of the hollow section pipe joint. In order to avoid such a failure, the overlapped K-joints were strengthened by pouring different concrete into the chords. Furthermore, to explore the detailed effect of filling different concrete in a chord on the hysteretic behavior of the overlapped K-joints, six full-scale specimens were fabricated by two forms, which included the circular chord and braces, the square chord and circular braces, and the low cyclic loading tests, which were carried out. The failure modes, hysteretic curves and skeleton curves of the joints were obtained, and the bearing capacity, ductility and energy dissipation of the joints were evaluated quantitatively. The results showed that plastic failure occurs on the surface of the chord of the joints without filling concrete, while the failure mode of the joints filled with concrete in the chords was the tensile failure of the chords at the weld of the brace toe, and the compressive braces had a certain buckling deformation; The strengthening measures of concrete filled with chord can effectively improve the mechanical properties of the K-joints, the delay of the plastic deformation of the chord, and improve the bearing capacity of the K-joints. Contrarily, the ductility coefficient and the energy dissipation ratio of K-joints decreased with the concrete filled in the chord. The hysteretic behavior of the K-joints with a circular chord and brace was slightly better than that of the K-joints with a square chord and circular brace, and the hysteretic behavior of the K-joints strengthened with fly ash concrete, which was better than that of the K-joints strengthened with ordinary concrete. The results of ANSYS (a large general finite element analysis software developed by ANSYS Company in the United States) analysis agreed well with the experimental results.

scholarly journals APAKAH PEMBENTUKAN HOLDING MENINGKATKAN KINERJA PERUSAHAAN ? ANALISIS PERBANDINGAN KINERJA ANAK PERUSAHAAN ABC BUMN HOLDING SEBELUM DAN SETELAH HOLDINGISASI DAN FAKTOR YANG MEMPENGARUHINYA

2019 ◽  
Vol 9 (2) ◽  
pp. 251
Author(s):  
Bambang Utoyo
Keyword(s):  
Financial Performance ◽  
Commodity Prices ◽  
Poor Performance ◽  
The Poor ◽  
Before And After ◽  
Sugar Mills ◽  
The Government ◽  
The Cost ◽  
Better Than ◽  
Non Parametric

Abstract: The government has established ABC BUMN Holding, with the hope that the performance of its subsidiaries' performance after holding has increased sharply. Unfortunately the financial performance of its subsidiaries is no better than before the holding. This study is intended to analyze the performance of ABC BUMN subsidiaries before and after holding and look for factors that affect their performance, with non-parametric statistical methods and discussions with experts. The results showed that the poor performance of subsidiaries was partly due to the focus of the holding Directors still on restructuring the debt of subsidiaries which were carried out before the establishment of holding, the low productivity of plantations as a result of late replenting, fertilization and maintenance that are not in accordance with the standard, the cost of revitalizing sugar mills has not been able to be prepared by the holding, the synergy between the parent company and its subsidiaries has not gone well, and there has been a tendency to decline in plantation commodity prices. Keywords: Holding, financial performance, low productivity of plantation,  statistic non parametric. Abstrak :Pemerintah telah membentuk ABC BUMN Holding, dengan harapan kinerja anak perusahaan setelah dilakukan holding meningkat secara tajam. Sayangnya kinerja keuangan anak perusahaannya tidak lebih baik dari sebelum holding. Penelitian ini dimaksudkan untuk menganalisis kinerja anak perusahaan ABC BUMN sebelum dan setelah holding dan mencari faktor yang memengaruhi kinerjanya, dengan metode statistic non parametric dan diskusi dengan pakar. Hasil penelitian menunjukkan bahwa belum baiknya kinerja anak perusahaan antara lain disebabkan fokus Direksi holding masih pada restrukturisasi hutang anak perusahaan yang terbawa dari sebelum pembentukan holding, rendahnya produktivitas perkebunan sebagai dampak terlambat replenting, pemupukan dan pemeliharaan yang tidak sesuai standar, besarnya biaya revitalisasi pabrik gula yang belum mampu disiapkan oleh holding, sinergi antara perusahaan induk dan anak perusahaan belum berjalan dengan baik, dan adanya kecenderungan turunnya harga komoditas perkebunan. Kata kunci: Holding, Kinerja keuangan, rendahnya produktivitas perkebunan, statistic non parametric.

scholarly journals Design and Performance of Concrete Pile Strengthened with Lengthened Steel-Tube Core: Model Tests and Numerical Simulations

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Shangyu Han ◽  
Lei Yun
Keyword(s):  
Bearing Capacity ◽  
Axial Force ◽  
Mechanical Performance ◽  
Load Capacity ◽  
Steel Tube ◽  
Model Tests ◽  
Scale Model ◽  
Conventional Concrete ◽  
Concrete Piles ◽  
Concrete Pile

In order to solve the problem of insufficient bearing capacity of existing concrete piles, a type of concrete pile with an additional lengthened strengthening core is designed, by inserting the steel tube through guiding hole and pouring core concrete. To reveal the mechanical performance of the reinforced piles, scale model tests and finite element simulations were performed. The results showed that both the vertical and horizontal bearing capacity increase with the length of the stiffening core. The axial force of the enhanced core is also smaller than conventional concrete piles, and the extended core can share the axial force of the foundation pile to improve the stress distribution of the pile body. These findings point toward a useful and general method for increasing the load capacity of existing concrete piles.

The Marine Derrick Test Tool Design and Optimization

2012 ◽  
Vol 226-228 ◽  
pp. 1055-1059
Author(s):  
Jiong Liu ◽  
Jun Pu Wang ◽  
Fu Wan ◽  
Yong Ling Zhou ◽  
Shi Xia
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tool Design ◽  
Analysis Software ◽  
Element Analysis ◽  
Design And Optimization ◽  
Test Tool ◽  
Design And Manufacturing ◽  
Design Ideas ◽  
Better Than

In this paper, aim the circumstances of derrick and substructure for a specific offshore platform, two derrick test tools be devised, The substructure and the test tool model established and assembled by Workbench software, and through the ANSYS finite element analysis software calculated the substructure and the test tool, then based on the analysis in contact with the forces condition of the test tool that were optimized. By comparing the test tools can be found, the test tooling option II that the weight, the forces condition and operation is better than another one, so when the conditions to meet the circumstances, option II is recommended to use. The design ideas and methods for test tool design and manufacturing provides a useful reference.

Research of Bored Pile Bearing Capacity with Mud Layer

2011 ◽  
Vol 255-260 ◽  
pp. 3797-3801
Author(s):  
Xiang Dong Zhang ◽  
Xue Lei Zhang ◽  
Meng Wang ◽  
Hong Hai Zhang
Keyword(s):  
Bearing Capacity ◽  
Large Scale ◽  
Major Type ◽  
Analysis Software ◽  
Empirical Formulas ◽  
Element Analysis ◽  
Bored Pile ◽  
Bored Piles ◽  
Dimensional Simulation ◽  
Different Thickness

Bored pile as a major type of foundation, during the construction process, hole collapse or weak air tightness of catheter leads mud layers or broken pile, which makes bearing capacity reduction or even complete loss leading differential settlement of building foundations. In this paper, two-dimensional simulation of the pile has been made by finite element analysis software ADINA. By using of large-scale numerical analysis software MATLAB, the data obtained has been fitted deriving empirical formulas, which researches how different thickness and depth of mud layers impact on bearing capacity of bored piles, having a certain engineering applications.

Performance and Failure Pattern on Enlarged Bottom Anchor Bolt under Pullout Loading

2013 ◽  
Vol 448-453 ◽  
pp. 1701-1706
Author(s):  
Shi Yan ◽  
Qi Le Yu ◽  
Hai Tao Du ◽  
Bi Cheng Song ◽  
Han Yan
Keyword(s):  
Mechanical Property ◽  
Finite Element Analysis ◽  
Bearing Capacity ◽  
Pullout Test ◽  
Failure Pattern ◽  
Analysis Software ◽  
Element Analysis ◽  
Anchor Bolt ◽  
The Finite Element Analysis ◽  
Side Friction

The pullout test of an anchor bolt is very important for the anchorage technology. Adopting enlarged bottom anchor bolts to wind turbine foundations can not only take advantage of the mechanical property of rock mass, but also have good security and economical efficiency. The finite element analysis software ANSYS is used in this paper to numerically analyze a single enlarged bottom anchor bolt under pullout loading, to research the performance and failure pattern of the anchor bolt. The anchor bolt side friction is extracted to understand the stress distribution of the bolt. By the analysis of the bearing capacity of anchor's enlarged head and the change of plastic zone form, the ultimate strength and destruction form of the anchor blot are clearly understood. The results also show that the bearing capacity of the proposed enlarged bottom anchor bolt can obviously increased, resulting in a cone-shape failure pattern of soil.

scholarly journals Model tests on pervious concrete pile and impervious concrete pile composite foundation

2020 ◽  
Vol 319 ◽  
pp. 06001
Author(s):  
Jun Cai ◽  
Guangyin Du ◽  
Han Xia ◽  
Changshen Sun
Keyword(s):  
Bearing Capacity ◽  
Model Test ◽  
High Strength ◽  
Composite Foundation ◽  
Pervious Concrete ◽  
Excess Pore Pressure ◽  
Soil Consolidation ◽  
Concrete Piles ◽  
Concrete Pile ◽  
Consolidation Rate

Taking the advantages of high permeability and high strength, pervious concrete piles is suitable for improving ground bearing capacity and reduce the post-construction settlement, so pervious concrete pile composite foundation is a new foundation treatment. As pervious concrete piles were designed to accelerate soil consolidation and improve the ground bearing capacity, so model test of pervious concrete piles were conducted to evaluate the consolidation effect. Pervious concrete with porosity 20%, 25%, 30% and 35% was designed to compare the strength and permeability, and the porosity of 30% was selected, so the pile was made for the model test. Compared with impervious concrete pile composite foundation, as the pervious pile shortens the drainage path, pervious concrete pile composite foundation can shorten the consolidation time by about 30.3% and significantly reduce the peak value of excess pore pressure. With the increase of load and consolidation rate of soil around the pile, the stress ratio of pervious concrete pile increase first, then decrease and tend to be flat.

Analysis of Rutting Change Rule on Asphalt Pavement Overlay

2011 ◽  
Vol 368-373 ◽  
pp. 3131-3136 ◽  
Author(s):  
Zhan Yong Yao ◽  
Li Jian Zhou ◽  
Qing Sen Shang ◽  
Jian Min Guo ◽  
Na Wang
Keyword(s):  
Asphalt Mixture ◽  
Traffic Load ◽  
Logarithmic Function ◽  
Analysis Software ◽  
Element Analysis ◽  
Asphalt Overlay ◽  
Depth Prediction ◽  
Pavement Overlay ◽  
The Relationship ◽  
Better Than

According to the traffic load, road surface temperature, pavement structure parameters and the creep parameters of asphalt mixture of Jiqing highway, the freeway asphalt overlay rutting depth prediction model is constructed with ABAQUS finite element analysis software to simulate numerically on overlay rutting depth, and the relationship among the axial load times, overlay thickness and the rutting depth is studied at the same time. The results of the study show that, the theoretical calculation agrees well with measured results of rutting depth, the relationship among the overlay thickness, the axle load times and the rutting depth coincides with logarithmic function model, and in the same asphalt overlay height, anti-rutting ability on AC-20 is better than that of AC-25 ,AC-20 and AC-25 combinations.

The Study on Bearing Capacity Influence for the Steel Tube Deformation in CFST Arch Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2236-2239 ◽  
Author(s):  
De Rong Zeng ◽  
Tie Jun Wang
Keyword(s):  
Bearing Capacity ◽  
Critical Stress ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Reduction Factor ◽  
Analysis Software ◽  
Element Analysis ◽  
Arch Bridge ◽  
Cfst Arch Bridge ◽  
Before And After

The theoretical formulas of the ultimate bearing capacity and critical stress of the deformed steel tube in a CFST arch bridge are gotten by the local section steel tube analysis and the elastic buckling analysis of steel tube, At the same time, the ultimate bearing capacity and critical stress of the deformed steel tube are computed by using ANSYS finite element analysis software and compared, which verifies the theoretical formulas are correctness and feasibility. Finally, a reduction factor formula of the ultimate bearing capacity of the tube before and after deformation is gotten; it directly reflected the reduction level of the ultimate bearing capacity of the deformed steel tube.

The Study on a New Composite Road Panel Structure

2014 ◽  
Vol 587-589 ◽  
pp. 961-964
Author(s):  
Hu Qi ◽  
Yun Gui Li ◽  
Kang Liu ◽  
Hai Lu Lu ◽  
Jian Yun Sun ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Calculation Result ◽  
Earth Pressure ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Road Paving ◽  
Temporary Road

<p class="p0">A kind of composite precast pavement system made by two composite and staggered layer panel is put forward, the finite element analysis software ANSYS is used to analyze the pavement system, and the calculation result is compared with the result of common precast pavement system. It shows that the proposed pavement system can greatly reduce the surface earth pressure, thus to improve the bearing capacity of pavement, and provide a new pavement structure system for the construction of site temporary road paving.</p>

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