Laterally Loaded Pile Cap Connections PDF Download
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Author: Kyle M. Rollins
Publisher:
ISBN:
Category : Lateral loads
Languages : en
Pages : 138
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Book Description
Author: Kyle M. Rollins
Publisher:
ISBN:
Category : Lateral loads
Languages : en
Pages : 138
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Book Description
Author: Tony Eugene Stenlund
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 122
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Book Description
There is presently considerable uncertainty regarding appropriate connection details between driven piles and pile caps. Prior research on the subject suggests that given a proper embedment length, a specialized reinforced connection may not be necessary. Eliminating these costly connection details could save thousands of dollars on both labor and materials. This research study focuses on the importance of the pile-to-cap connection detail with respect to the reinforcement connection and pile embedment length.
Author: Muhammad Nasrullah Khan
Publisher:
ISBN:
Category :
Languages : en
Pages : 482
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Book Description
This thesis is concerned with study of behavior of pile to pile-cap connection with respect to lateral loads. In this connection prestressed precast concrete piles and reinforced concrete pile caps were given particular attention. General parameters for the design of pile-pile cap connection are discussed with reference to ACI Code and New Zealand Code. Seismic design philosophies for prestressed concrete pile and reinforced concrete pile cap connections are given in the summary form. A review of the previous works concerning pile-pile cap connections is given along with comments. The properties of main materials, ie, concrete and steel are discussed, elaborating their physical models. Analytical methods for analysis are discussed with a short review of the analytical as well as mathematical models for concrete and steel. Reinforced concrete models are discussed for the finite element method of analysis. Seismic design methodology for bridge piers is discussed in order to develop understandings of the possible origins and effects of the lateral loads on the pile-pile cap connections. Design of reinforced concrete pile cap is discussed along with assumptions, design steps and explanatory examples according to ACI Code as well as New Zealand Code. Six pile-pile cap connections are modelled incorporating the improved material properties as well as detailing of reinforcement. The analysis of these models is carried out by the finite element method, using 'ABAQUS' program, and the results are compared with the experimental results. The proposed models have shown satisfactory results in most of the areas. There are valuable indications of requirements for further research in some areas. Finally, a number of recommendations are offered on the basis of the observations made and conclusions drawn during this study. Recommendations are also made for areas demanding further research for better understanding of the behavior of pile-pile cap connections. Comments are offered about "ABAQUS" for the aspects which demand further elaboration for better understanding and convenient application of the program.
Author: Jerry E. Stephens
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 156
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Book Description
The response of a concrete filled, steel pipe pile-to-concrete pile cap connection subjected to extreme lateral loads was experimentally and analytically investigated in this project. This connection is part of a bridge support system used by the Montana Department of Transportation that consists of a linear array of piles connected at the top by a concrete pile cap. Five 1/2 size models of this connection were tested to failure under monotonically increasing and/or cyclic lateral loads. The primary attribute of the connection that was varied between tests was the amount and layout of the reinforcing steel in the pile cap. The depth of embedment of the pipe pile in the cap was held constant. The first tests were done on lightly reinforced pile cap cross-sections, and failure occurred in the pile caps due to tensile cracking of the concrete and yielding of the reinforcing steel adjacent to the pile. In subsequent connections, the amount of reinforcing steel in the cap was increased, and its arrangement was modified, until a plastic hinge occurred in the pipe pile before failure of the cap occurred. The behavior of each connection was analyzed using hand calculations, strut and tie models, and solid finite element models. The hand calculations accurately predicted the nature of the failure mechanism for each connection, but only poorly predicted the magnitude of the failure load. The strut and tie models used in this investigation were created and analyzed using conventional structural analysis software. The resulting models offered significant detail relative the response throughout the pile cap, but were unable to fully represent yielding of the reinforcing steel and the attendant redistribution of stresses within the cap. Sufficiently promising results were obtained relative to predicting the load and location at which inelastic behavior will initiate, that this analysis methodology possibly should be pursued further. Finally, though finite element models were not successfully used to model the damage cycle through cyclic loads as originally hoped, they did prove useful for extracting 3D information leading up to a state of permanent damage. They also show immediate promise for modeling responses to monotonic load conditions, particularly for analysis where concrete damage is not the controlling failure mechanism.
Author: Pedro Franco Silva
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 424
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Book Description
Author: Lymon C. Reese
Publisher: CRC Press
ISBN: 1439894302
Category : Technology & Engineering
Languages : en
Pages : 529
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Book Description
The complexities of designing piles for lateral loads are manifold as there are many forces that are critical to the design of big structures such as bridges, offshore and waterfront structures and retaining walls. The loads on structures should be supported either horizontally or laterally or in both directions and most structures have in common t
Author: Pedro Franco Silva
Publisher:
ISBN:
Category :
Languages : en
Pages : 834
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Book Description
Author: Wei Dong Guo
Publisher: CRC Press
ISBN: 100380649X
Category : Technology & Engineering
Languages : en
Pages : 411
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Book Description
This book presents models that capture the nonlinear response of piles subjected to lateral forces. Utilising a consistent approach encompassing new mathematical models, it offers solutions presented as closed-form expressions and underpinned by the same set of 3-5 measurable soil-input parameters. These focus on nonlinear response of mono piles, anchored piles, pile groups, and torsional piles, as well as passive piles subjected to soil movement induced in shearing, sliding slopes or excavation, and earthquake shaking. The models can also be used for pipelines and similar beam structures. Solutions are provided in the form of design charts, with each parameter obtained using available test data and illustrated with real-world cases. The models reveal, for the first time, the mysterious mechanisms of amplification resulting from back-rotation, which have incurred the collapse of structures such as the Showa Bridge and Nicoll Highway, as well as the distortion of piles during earthquakes. Advanced Design of Pile Foundations Under Lateral Loading is ideal for practicing foundation engineers and students at graduate level. Wei Dong Guo is co-founder of Hans Innovation Group and former Associate Professor at the University of Wollongong, Australia. He is a Chartered Professional Engineer and is a Fellow of Engineers Australia by whom he was awarded the 2012 Warren Medal.
Author: Jerry E. Stephens
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 148
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Book Description
The efficacy of a new procedure developed by the Montana Department of Transportation (MDT) to design concrete filled steel tube (CFT) pile to concrete pile cap connections was investigated in this project. A series of CFT piles embedded in a concrete pile cap is a desirable system to support small to mid-span bridges. Traditional methods for designing the connection between the CFT piles and pile cap often lead to congested and complex reinforcing schemes, and this complexity can limit the use of this support system. MDT has developed a simple design method for this connection utilizing a new reinforcing scheme that greatly simplifies the design and construction of this connection. The new reinforcing scheme includes U shaped reinforcing bars that encircle the embedded CFT piles within the cap that counteract the moment related demands introduced by the embedded pile under lateral load events. The efficacy of the MDT design method implementing the new reinforcing scheme, which was developed from previous research and testing completed by Montana State University, is evaluated in this research.
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 88
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Book Description
A preliminary investigation was conducted on the behavior of steel pipe pile to concrete pile cap connections for bridge structures subjected to extreme seismic and ice forces. This investigation consisted of reviewing available information on the analysis, design, and performance of steel pipe pile to concrete pile cap connections, setting up a finite element model for analyzing the behavior of these connections, and investigating a method for experimentally testing these connections. Only limited information on the behavior of steel pipe pile to concrete pile cap was found during the literature search. Therefore, a finite element model was developed to study connection behavior. The model, developed in ANSYS, consisted of a typical bridge bent (comprised of steel pipe piles topped with a concrete pile cap) and superstructure. The concrete and steel were represented with 3D brick and link elements. All materials were modeled as linear and elastic. Inelastic material behavior was studied in some detail, and issues that need to be addressed in future analyses in modeling such behaviors were identified. The finite element model was used to study the behavior of the pipe pile to concrete pile cap connection in different situations. The model was loaded with a horizontally directed inertial body force of 1 g to study the behavior of the connection under lateral seismic loads. Ice loads were applied as pressures acting directly on the pile cap (high water case) and on the lead pile in a bent. These pressures varied from 0 to 200 psi (0 to 1379 kPa). In general, large stresses and strains were predicted in the pile to pile cap connection under seismic loads. The predicted strains exceeded the elastic limit of the materials, suggesting that large deformations and significant damage may occur in the pile and cap under seismic loads. The stresses and strains predicted in the ice load analyses were significantly lower than those predicted in the seismic analyses, and only minor damage would be expected in the pile and cap under ice loads. Parametric calculations were performed to estimate the effect of deck support conditions, pile height, pile embedment, and pile reinforcement on connection response. Performance of the finite element model was validated by comparing its results with the results of simple hand calculations and with the results of a test on a physical model of a pile and pile cap. The hand calculations were performed using a simple 2D frame model of a typical bent. The physical test was performed on a 1/2 size model of an interior section of a typical bent. Further calculations need to be done that realistically consider the inelastic response of the pile and cap materials under seismic loads. The objectives of such calculations would be (a) to precisely determine the vulnerability (strength and ductility) of these connections under seismic loads, (b) to develop retrofit strategies for existing connections, and (c) to develop design approaches for new connections, as necessary.
