scholarly journals Finite Element Modelling of Prestressed Concrete Piles in Soft Soils, Case Study: Northern Jakarta, Indonesia

2021 ◽  
pp. 21-30
Author(s):  
Aswin Lim ◽  
Varian Harwin Batistuta ◽  
Yiska Vivian Chritiansen Wijaya
Keyword(s):  
Finite Element ◽  
Prestressed Concrete ◽  
Coastal Area ◽  
Interface Strength ◽  
Load Test ◽  
Loading Test ◽  
Soft Soils ◽  
Concrete Piles ◽  
High Rise

Jakarta is faced with limited land resources due to its position as the capital city of Indonesia. Therefore, numerous high-rise buildings are being constructed to solve this problem and provide accommodations for a large number of Jakarta residents. Studies have shown that prestressed concrete piles (spun piles) are commonly used as the foundations of high-rise buildings in metropolitan cities across Indonesia, especially in the Northern Jakarta Coastal area, which is predominant with deep soft soils deposit. To further assess and verify the ultimate capacity of the pile, a static loading test was conducted. However, not all results from the field test produced ideal, accurate, precise, and reliable load-settlement curve (until failure) results. Therefore, this study aims to determine the soil properties for the analysis of prestressed concrete spun piles with a diameter of 600 mm in the Northern Jakarta coastal area based on the standard penetration test values (SPT-N). It is a case study of a well-documented static pile load test using the kentledge system. Back analyses were performed by the finite element method to obtain the extrapolated load-settlement curve. Furthermore, the effect of interface strength between pile and soil on the load-settlement curve was also investigated. The results showed that a reduction of interface strength leads to a smaller load–settlement curve. In addition, several geotechnical engineering parameters of soil, such as the undrained shear strength and effective young's modulus, were established using data from an in-situ soil site investigation and empirical correlations with SPT-N.

scholarly journals Experimental Study on Mechanical Property of Stiffening-ribbed-hollowpipe Reinforced Concrete Girderless Floor with Four Clamped Edges Supported

2013 ◽  
Vol 7 (1) ◽  
pp. 170-178 ◽  
Author(s):  
Weijun Yang ◽  
Yongda Yang ◽  
Jihua Yin ◽  
Yushuang Ni
Keyword(s):  
Mechanical Property ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Large Scale ◽  
Load Test ◽  
Static Load Test ◽  
Loading Test ◽  
Element Analysis ◽  
Clamped Edges

In order to study the basic mechanical property of cast-in-place stiffening-ribbed-hollow-pipe reinforced concrete girderless floor, and similarities and differences of the structural performance compared with traditional floor, we carried out the destructive stage loading test on the short-term load test of floor model with four clamped edges supported in large scale, and conducted the long-term static load test. Also, the thesis conducted finite element analysis in virtue of ANSYS software for solid slab floor, stiffening-ribbed-hollow-pipe floor and tubular floor. The experiment indicates that the developing process of cracks, distribution and failure mode in stiffening-ribbed-hollow-pipe floor are similar to that of solid girderless floor, and that this kind of floor has higher bearing capacity and better plastic deformation capacity. The finite element analysis manifests that, compared with solid slab floor, the deadweight of stiffening-ribbed-hollow-pipe floor decreases on greater level while deformation increases little, and that compared with tubular floor, this floor has higher rigidity. So stiffening-ribbed-hollow-pipe reinforced concrete girderless floor is particularly suitable for long-span and large-bay building structure.

Combined Lifting Analysis and Load Test of a Hook Foundation in a GRP Hull

2006 ◽  
Vol 5-6 ◽  
pp. 101-106
Author(s):  
S. Quinn ◽  
S.S.J. Moy ◽  
Keith Piggott
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Load Test ◽  
Element Analysis ◽  
Detailed Design ◽  
Reinforced Polymer ◽  
Design Changes ◽  
Physical Testing ◽  
Final Design

The combination of simulation and physical testing is powerful. In this case study Finite Element Analysis (FEA) and a 96 tonne load test were used to prove that the lifting points for a new semi-rigid inflatable rescue craft met their statutory requirements before full manufacture. The FEA was used to optimise the detailed design of the lifting points, without the need to test each different configuration, and the load test was used to prove the final design in practice, before full manufacture. The FEA showed that the bearing stresses in the Glass Reinforced Polymer (GRP) hull of the initial design were unacceptable and appropriate design changes were made from further analysis. However, to suitably risk manage the project a full load test was required to demonstrate that the revised lifting point details met their statutory requirements, before full manufacture of the new craft.

Influence of the Dynamic Excavation Construction Procession Rail Transit Projects in Deep and Large Foundation Pits

2013 ◽  
Vol 438-439 ◽  
pp. 1038-1042
Author(s):  
Hong Xiao Wu ◽  
Lang Li ◽  
Cun Cheng Shi ◽  
Yi Hao Chen ◽  
Xiao Hu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Construction Project ◽  
Rail Transit ◽  
Subway Tunnel ◽  
High Rise ◽  
Data Analyses ◽  
Excavation Process ◽  
The Impact

In the construction of high-rise buildings, the effect produced by the excavation of deep and large foundition pits on the surrounding structures cannot be ignored. This paper presents a case study from a construction project located in Nanjing, in which the dynamic excavation process of a founditon pits is numerically analyzed with finite element method on Plaxis. The impact of various excavation stage on subway tunnel nearby is achieved in terms of the results of data analyses and assessments.

Implementation of the tangent modulus – vertical stress (Et–σv) model for flexible pavements analysis

2006 ◽  
Vol 43 (11) ◽  
pp. 1131-1143
Author(s):  
J -M Konrad ◽  
Ph D Nguyen
Keyword(s):  
Finite Element ◽  
Granular Material ◽  
Vertical Stress ◽  
Load Test ◽  
Tangent Modulus ◽  
Quebec City ◽  
Elastic Model ◽  
Loading Test ◽  
Test Plate ◽  
Plate Load Test

A recently developed nonlinear elastic model of granular material, referred to as the tangent modulus – vertical stress (Et–σv) model, was implemented into a finite element numerical solver FlexPDE. The FlexPDE program was used to compare deflection predictions with actual plate-load test data from a site near Québec City. The proposed Et–σv model performed well and led to excellent predictions for load levels of 40, 50, and 70 kN. Comparison with predictions using the Uzan model suggests that constitutive models of granular materials are best expressed in terms of vertical stress rather than mean stress for the prediction of elastic pavement response for field conditions.Key words: granular material, resilient modulus, triaxial test, plate-loading test, finite element.

Static Loading Test of the End-Bearing Pile under the Sides Friction Action

2013 ◽  
Vol 353-356 ◽  
pp. 974-978
Author(s):  
Xiao Wei Wang ◽  
Nan Gai Yi ◽  
Shi Ping Zhang
Keyword(s):  
Finite Element ◽  
Load Test ◽  
Practical Significance ◽  
Engineering Practice ◽  
Single Pile ◽  
Static Load Test ◽  
Loading Test ◽  
Foundation Soil ◽  
Measuring Point ◽  
End Bearing Pile

Because the pile foundation has the characters of high bearing capacity, small deformation and easy to construct, it is widely used in practical engineering. In order to verify the end-bearing pile loading capability, in this paper, the single pile vertical compressive static load test is used to the on-site measuring point in actual engineering test, and get the Q-S curve of the pile. FEM is used to simulate the test at the same time. The ideal elastic-plastic constitutive model based on Mohr-Coulomb failure criteria is used to simulate foundation soil. Some conclusions are obtained by using large scaled finite element analysis software ADINA to build the 2D plane strain finite element model and to proceed numerical analysis of the pile. Finally, the comparative analysis with the engineering practice is proceeded. It has the practical significance for the structure analysis of the single pile.

Analysis of Dynamic Performance Testing of Bridge Based on Finite Element and Dynamic Load Test

2012 ◽  
Vol 178-181 ◽  
pp. 2323-2328
Author(s):  
Zhi Gang Lu ◽  
Guo Jian Li ◽  
Wen Wu Jiang
Keyword(s):  
Finite Element ◽  
Theoretical Analysis ◽  
Large Scale ◽  
Natural Vibration ◽  
Performance Testing ◽  
Load Test ◽  
Natural Vibration Frequency ◽  
Loading Test ◽  
Finite Element Software ◽  
The Impact

Using the Jianninxia Bridge as the experiment object, we set dynamic loading test on it, and did theoretical analysis on its natural vibration characteristics by using large-scale general finite-element software. After the comparative analysis between the collected datas and the theoretical analysis datas, we find that the measurement of the natural vibration frequency is greater than the theoretical analysis value; and the measured value of impact coefficient is less than the theoretical value; therefore, it indicates that this bridge’s actual structural rigidity is greater than its theoretical rigidity, but lack of the impact resistance.

Current Use of Prestressed Concrete Pipe Piles Founded in Silty Geomaterials

2010 ◽  
Vol 168-170 ◽  
pp. 116-120
Author(s):  
Feng Yu ◽  
Jing Yu He ◽  
Zhong Miao Zhang
Keyword(s):  
Prestressed Concrete ◽  
Slenderness Ratio ◽  
Load Test ◽  
Test Results ◽  
Deep Foundation ◽  
Concrete Pipe ◽  
Independent Case ◽  
Limiting Value ◽  
Made In

Prestressed concrete pipe piles have been increasingly used as deep foundation structures for decades. Despite the availability of a limited number of well-instrumented load test results, pile designers would like to know the general performance of such piles in case of lacking adequate experience. An attempt is made in this study to establish a database composed of more than one thousand of pile tests. All piles are founded in silty soil that is one of the competent bearing geomaterials. Short and medium-length piles with slenderness ratios ranging from 20 to 80 are most widely used. The capacity of pile increases with increasing the pile slenderness ratio until a limiting value is achieved. Use of very long piles to reduce settlement is unfavorable and the rebound rates for piles with various lengths are similar. An independent case study is also conducted to witness the success of employing the empiricism-based analyses in the preliminary design of concrete pipe piles.

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