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Foundation analysis and design
01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
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TL;DR: In this paper, a viscoplastic model for predicting earth pressure distribution generated behind an instrumented wall due to line loads in addition to backfill was presented, where an eight-nodded two-dimensional quadrilateral elements were adopted for idealization of wall and soil, whereas, the interface between them was idealized by six-noweded zero thickness interface elements.
Abstract: This work presents a viscoplastic model for predicting earth pressure distribution generated behind an instrumented wall due to line loads in addition to backfill. Eight-nodded two-dimensional quadrilateral elements are adopted for idealization of wall and soil, whereas, the interface between them is idealized by six-nodded zero thickness interface elements. The nonlinear behavior of soil is modeled as viscoplastic or time-dependent with Mohr–Coulomb criterion, while the wall is modeled as elastic material. The solution employed is based on 2 × 2 Gauss integration rule and incremental procedure with iterations using the explicit time-marching scheme. The results indicate significant effects of initial stresses, interface roughness, and both position and magnitude of line loads on lateral earth pressure distribution along the wall, in addition to, the applicability of the model and the efficiency of the computer program developed.
TL;DR: In this article, a sloping breakwater type structure is selected for the purpose of pipeline scour protection, and the stability of the foundation of the breakwater is analyzed with the method developed by Meyerhof.
Abstract: The debarking location of a gas pipeline is at the area where typhoons take place frequently and the geotechnical condition of the slope is very complex. A sloping breakwater type structure is selected in this paper for the purpose of pipeline scour protection. Since part of the sloping foundation soil consists of silty clay whose strength is very low, the bearing capacity is checked with the base pressure induced by the breakwater. The stability of the foundation of the breakwater is analyzed with the method developed by Meyerhof. The scour protection structure is proved effective and stable.
TL;DR: In this paper, the bearing capacity of strip and rectangular footings on cohesive frictional soils under eccentric loads is revisited by means of two-and three-dimensional numerical analyses in the finite element code Simulia Abaqus.
Abstract: Safe performance of structures founded on shallow footings necessitates that: (a) the ground settlements are kept within acceptable threshold limits; and (b) the bearing capacity is always higher than the imposed stress, by thus giving an acceptable factor of safety. Regardless of minor alterations on the original bearing capacity expression by (Terzaghi K (1943) Theoretical Soil Mechanics. Wiley), most terms are used routinely in engineering practice to date. This paper revisits the bearing capacity of strip and rectangular footings on cohesive frictional soils under eccentric loads, by means of two- and three-dimensional numerical analyses in the finite element code Simulia Abaqus. The geomaterial is described by means of the Mohr–Coulomb failure criterion and works at a null dilation angle, while the footing remains undeformed regardless of the ground stiffness. The ground-footing interface allows for separation and slippage to account for cases where the ground detaches or slips beneath and around the footing. The paper studies the effect of: (a) elastic Young’s Modulus; (b) width; (c) cohesion; (d) surcharge; (e) dilation; (f) strain-softening; and (g) interface roughness on the bearing capacity. The paper shows that the Eurocode 7 underestimates the bearing capacity by up to 60% compared to the numerical solution. Revised bearing capacity and shape factors are developed to enhance the accuracy of the bearing capacity equation.
30 Oct 2017
TL;DR: In this article, the stress, bearing capacity and the settlement behavior in the loose sandy soils were investigated experimentally and theoretically, and the results showed that the bearing capacity increases when the length of the footing increases and the measured vertical stress values decrease along the depths for all the three types of footing types.
Abstract: In this study, the stress, the bearing capacity and the settlement behavior in the loose sandy soils were investigated experimentally and theoretically. The study was performed in central loading conditions using strip and rectangular footings. The vertical stresses resulting from the external are measured for three different distances simultaneously. And also the load-settlement curves were obtained. The results showed that the bearing capacity increases when the length of the footing increases and the measured vertical stress values decrease along the depths for all the three types of the footing types. The test results were compared with theoretical results given in the literature. As seen from this comparison, the experimental results are in accordance with the theoretical results.
Cites methods from "Foundation analysis and design"
...The method uses the theory of elasticity to calculate the stress under a point load in a homogeneous semi-infinite half space (Bowles, 1996)....
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...The method uses the theory of elasticity to calculate the stress under a point load in a homogeneous semi-infinite half space (Bowles, 1996)....
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27 Dec 2013
TL;DR: In this article, the authors propose a table with table normal, table normal table and table normal-table normal table-normal table, Table Normal Table Normal table, table Normal table.
Abstract: ABSTRAK Pondasi bertujuan sebagai penopang bangunan dan meneruskan beban bangunan di atasnya ke lapisan tanah yang cukup kuat daya dukungnya. Untuk itu, pondasi bangunan harus diperhitungkan agar dapat menjamin kestabilan bangunan terhadap berat sendiri, beban-beban yang bekerja, gaya-gaya luar seperti tekanan angin, gempa bumi, dan lain-lain dan tidak boleh terjadi penurunan melebihi batas yang diijinkan. Pondasi tiang pancang merupakan salah satu jenis dari pondasi dalam yang umum digunakan. Untuk menghitung kapasitas tiang, terdapat banyak rumus yang dapat digunakan. Hasil masing- masing rumus tersebut menghasilkan nilai kapasitas yang berbeda beda. Tujuan studi ini untuk menghitung dan menganalisis daya dukung dan penurunan kelompok mini pile dari hasil Sondir, Standard Penetration Test (SPT), dan membandingkan hasil perhitungan tersebut dengan hasil dari test Pile Driving Analizer (PDA) Hasil perhitungan daya dukung ultimit (Q u )tiang pada kedalaman yang sama yaitu 18,8 m, untuk sondir diperoleh 98,225 ton, data PDA 42,8 ton, dan data SPT 83,885 ton pada kedalaman 18,45 m. Sedangkan untuk penurunan pada kedalaman yang sama yaitu 18,8 m, untuk sondir 6,67 mm, untuk data PDA 6,9 mm, dan data SPT 6,1 mm pada kedalaman 18,45 m. Terdapat perbedaan daya dukung dan penurunan tiang dari 4 titik sondir, satu titik SPT dan berdasarkan hasil test PDA. Perbedaan hasil tersebut dapat disebabkan oleh perbedaan jenis tanah yang terdekat sekalipun dan cara pelaksanaan pengujian yang bergantung pada ketelitian operator. Kata kunci : Daya dukung, penurunan, CPT, SPT, PDA Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */
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