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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, the sensitivity of laterally loaded piles due to variable location of a soil layer is investigated in the scope of variational calculus, and the changes of bending energy due to changes of the location of the soil layer are defined by means of a functional with moving ends combined with adjoint structure concept.
1 citations
01 Mar 1992
TL;DR: In this article, the authors evaluate in-structure shock calculations for buried reinforced concrete structures under dynamic loads from buried conventional explosives and evaluate two-dimensional finite-element analysis techniques applied to this complex three dimensional problem.
Abstract: : The analysis of buried structures designed to resist blast loading is a continuing problem in the area of engineering mechanics. The complex structural dynamic of the problem, coupled with the uncertainties of soil structure interaction, make this a difficult challenge. Even if the structure itself is designed to survive the expected dynamic loads, the shock environment inside may be severe enough to harm personnel or equipment. A thorough understanding of the expected shock environment is therefore needed to design ways to reduce this damage. The objective of this study was to conduct and evaluate in-structure shock calculations for buried reinforced concrete structures under dynamic loads from buried conventional explosives. Of primary importance was the evaluation of two dimensional explosives. Of primary importance was the evaluation of two dimensional (2-D) finite-element analysis techniques applied to this complex three dimensional problem. Two personal computer based, 2-D finite-element programs, were evaluated for application to this problem.
1 citations
Cites background or methods from "Foundation analysis and design"
...These values are relatively high but are within the range of those suggested by Bowels [12]....
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...A typical soil modulus of elasticity of 1,000 psi was assumed based on recommendations by Bowles [12]....
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Journal Article•
TL;DR: In this article, the effect of polypropylene fiber on improving the strength of black cotton soil was found by conducting unconfined compressive strength test and Atterbergs limit test and comparison of the properties of soil before and after the addition of fibre was made.
Abstract: 1,2 Assistant Professor, Department Of Civil Engineering, Mount Zion College Of Engineering,Kadammanitta, Pathanamthitta Abstract— This paper describes the compaction and strength behavior of black cotton soil (BC soil) reinforced with polyproplene fibers. The extent of increase in strength of black cotton soil, for varying diameters (6mm and 12 mm) and percentages (0.50%, 0.75%, 1%, 1.25% and 1.50%) of polypropylene fibres were found out by conducting unconfined compressive strength test and Atterbergs limit test. The effect of polypropylene fibre on improving the strength of black cotton soil was found. Comparison of the properties of soil before and after the addition of fibre was made. Keywords— load-deformation behavior, surface friction, interlocking, consolidation characteristics, polypropylene fibre, clayey soil,
1 citations
TL;DR: In this article, a semi-buried structure with foam sandwiched walls and buttresses to reduce the effect of blast is analyzed. Butts are provided in between walls and helps in blast mitigation, while foam core is modelled using brick elements with reduced integration and volumetric hardening.
Abstract: Semi-buried structures are most commonly used at first line of defense along the border between two countries. This demands investigation of their dynamic behaviour under blast loading. Herein, a semi-buried structure with foam sandwiched walls and buttresses to reduce the effect of blast is analysed. The effect of provision of different configurations of buttresses and foam core between two layers of structural wall subjected to explosive loadings is investigated using ABAQUS/Explicit®. Modelling of semi-buried structure is carried out by employing shell elements and soil is modelled using frequency independent spring-dashpot-mass model. The foam core is modelled using brick elements with reduced integration and volumetric hardening. Effect of strain rate on structural steel is modelled by employing Johnson-Cook (J-C) model. Results indicate that geometry of buttresses and foam core type governs structural response to dynamic loading. It is observed that inner wall of the structure is protected by foam provided in between walls and helps in blast mitigation. Further, it is observed that design of such structures is dependent on the correct identification of buttresses type and isolation of inner wall of structure by provision of energy absorbing materials like foam.
1 citations
Cites background or methods from "Foundation analysis and design"
...This was modelled in each degree-of-freedom by spring-dashpot model (Wolf, 1989, 1997; Bowles, 1997)....
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...Propagation velocity, C, under the parameters considered herein is 500 m/s (Bowles, 1997)....
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...The characteristics of silty soil used in this investigation are already reported in Table 2 (Bowles, 1997)....
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...These radially expanding compressive blast waves propagate through soil medium and are expressed with the help of following equation (Wolf, 1989, 1997, Bowles, 1997) as: a 0)( tt ePtP (3) where 0P : is peak stress in soil and it is represented by: n W R fP...
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TL;DR: In this article, a generalized analysis and solution procedure for finding the flexural response of beams on viscoelastic foundations is presented, where the foundation soil is modelled as a tension membran...
Abstract: The present study presents a generalized analysis and solution procedure for finding the flexural response of beams on viscoelastic foundations. The foundation soil is modelled as a tension membran...
1 citations
Cites methods from "Foundation analysis and design"
...The Equation (5) for different loading cases is solved using finite difference method (Teng 1962; Bowles 1982)....
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...Finite difference discretization The Equation (5) for different loading cases is solved using finite difference method (Teng 1962; Bowles 1982)....
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