The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
A J Valsangkar - One of the best experts on this subject based on the ideXlab platform.
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Limit States and Factor of Safety in Design of an Anchored Sheet Pile Wall
Transportation Research Record, 2001Co-Authors: A B Schriver, A J ValsangkarAbstract:Factors of safety in the traditional design of anchored sheet pile walls have been introduced in a variety of ways. Furthermore, empirical and semiempirical factors are used to modify the calculated depth of embedment, anchor rod force, and Maximum Bending Moment in sheet piling. This leads to a range of designs within the traditional allowable stress design (ASD) approach. Even in the new ultimate limit states design (LSD) method, two approaches are available. One approach is to use load and resistance factor design (LRFD), and the other is to use partial safety factors on the material properties in combination with load factors. In view of the number of design alternatives available, a calibration study of LSD with ASD for an anchored bulkhead was performed. The practical problem of a steel sheet pile wall in a layered cohesionless soil and cohesionless soil overlying cohesive soil was analyzed. The depth of embedment, the anchor rod force, and the Maximum Bending Moment in sheet piling were determined ...
T S Hull - One of the best experts on this subject based on the ideXlab platform.
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model tests on single piles subjected to lateral soil movement
Soils and Foundations, 1995Co-Authors: H G Poulos, L T Chen, T S HullAbstract:This paper describes a series of laboratory tests on single instrumented model piles embedded in calcareous sand undergoing lateral movement. Key parameters influencing the Maximum Bending Moment in the pile for a constant soil density have been identified to be pile head fixity condition, the ratio of the depth of moving soil to the pile embedded length, and pile diameter and stiffness. Normalized expressions for Maximum Bending Moment are also presented. The agreement between the experimental results and the theoretical predictions by an existing boundary element program is shown to be reasonably good.
Peggi L. Clouston - One of the best experts on this subject based on the ideXlab platform.
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Tree Pulling Tests of Large Shade Trees in the Genus Acer
Arboriculture and Urban Forestry, 2008Co-Authors: Brian Kane, Peggi L. CloustonAbstract:Shade trees provide many benefits but can cause damage if they fail. Despite the potential for costly litigation that sometimes arises when damage occurs, there are no investigations of Bending Moments and stresses involved in failure of shade trees. Twenty-four shade trees of three species in the genus Acer were pulled to failure at a suburban property in Massachusetts, U.S. The Maximum load and distance to failure were used to calculate Maximum Bending Moment; stress at the point of failure was calculated from Bending Moment and stem cross-sectional dimensions. No trees uprooted, and failures were categorized as either stem at a lateral branch(es) or the attachment of codominant stems. Failures of codominant stems required one-half of the stress of stem failures. Similarly, failures of codominant stems occurred at only 45% of wood strength, whereas stem failures occurred at 79% of wood strength. Prediction of Maximum Bending Moment from tree morphometric data was more reliable than prediction of Maximum stress from tree morphometric data. Prediction of Maximum Bending Moment and stress was more reliable for stem failures than codominant failures. Results are compared with similar tests on conifers. Implications of findings are discussed with respect to risk assessment of shade trees.
A B Schriver - One of the best experts on this subject based on the ideXlab platform.
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Limit States and Factor of Safety in Design of an Anchored Sheet Pile Wall
Transportation Research Record, 2001Co-Authors: A B Schriver, A J ValsangkarAbstract:Factors of safety in the traditional design of anchored sheet pile walls have been introduced in a variety of ways. Furthermore, empirical and semiempirical factors are used to modify the calculated depth of embedment, anchor rod force, and Maximum Bending Moment in sheet piling. This leads to a range of designs within the traditional allowable stress design (ASD) approach. Even in the new ultimate limit states design (LSD) method, two approaches are available. One approach is to use load and resistance factor design (LRFD), and the other is to use partial safety factors on the material properties in combination with load factors. In view of the number of design alternatives available, a calibration study of LSD with ASD for an anchored bulkhead was performed. The practical problem of a steel sheet pile wall in a layered cohesionless soil and cohesionless soil overlying cohesive soil was analyzed. The depth of embedment, the anchor rod force, and the Maximum Bending Moment in sheet piling were determined ...
H G Poulos - One of the best experts on this subject based on the ideXlab platform.
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model tests on single piles subjected to lateral soil movement
Soils and Foundations, 1995Co-Authors: H G Poulos, L T Chen, T S HullAbstract:This paper describes a series of laboratory tests on single instrumented model piles embedded in calcareous sand undergoing lateral movement. Key parameters influencing the Maximum Bending Moment in the pile for a constant soil density have been identified to be pile head fixity condition, the ratio of the depth of moving soil to the pile embedded length, and pile diameter and stiffness. Normalized expressions for Maximum Bending Moment are also presented. The agreement between the experimental results and the theoretical predictions by an existing boundary element program is shown to be reasonably good.