Download or read book Culverts written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1985 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Static and Seismic Soil Culvert Interaction written by Osama Salem A. Abuhajar and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Failures of box culverts under static and earthquake loads can cause significant economic loss. Therefore, it is important to investigate the soil-culvert interaction of box culverts to understand their responses to such loads. The response of buried box culverts is a complex soil-structure interaction problem, where the relative stiffness between the soil and the structure is a critical factor. Soil arching is an important aspect of the soil-culvert interaction problem, and results in the redistribution of free-field stresses due to the presence of buried structures and leads to an increase or decrease in the loading around box culverts. A series of static and seismic scaled physical model centrifuge tests were performed to investigate the soil culvert interaction. Two different box culvert thicknesses and two Nevada sand relative densities were used to explore the interaction between the sand and box culverts under a wide range of different conditions. The static loading consisted of the soil self-weight of and the surcharge from a surface foundation, while the seismic loading considered the application of seven earthquake shaking events for each test. Several sensors were used in these tests, including tactile pressure sensors, LVDTs, accelerometers and strain gauges. A newly developed method for installing the strain gauges inside the box culvert model is introduced. The responses of the box culvert have been compared for all of the loading conditions. It was observed that the kinematic soil culvert interaction due to the presence of a box culvert, as well as the surface foundation, had a significant effect on reducing the peak ground acceleration at the surface when compared to the free-field peak ground acceleration. The kinematic interaction can provide up to a 50% reduction and is dependent on the amplitude of the input motion at the base of the model. Small values for the rocking of the box culvert and surface foundation were also observed, and their values changed with the amplitude of the input motion. The values observed for the foundation were higher than those for the culvert, due to the soil confinement. The lateral movement of the foundations increased as the peak ground acceleration at the base of the model increased. The racking deformation ratio of the culvert was found to change with the thickness and therefore the relative stiffness of the culvert and the soil density. Soil pressures measured by different methods were in good agreement and those obtained from the tactile sensors can be considered to bound the expected behaviours. The soil pressure observed on the culvert top slab had a parabolic shape, i.e., higher values at the edges and lower at the center than the theoretical vertical soil pressure. On the side wall, the horizontal soil pressure increased with depth. The soil-culvert interaction factors decreased at the center and increased at the edges of the top slab, as the thickness and the relative stiffness of the culvert decreased. The seismic analysis showed that the seismic bending moment increased as the peak ground acceleration at the model base and the relative stiffness of the culvert increased. The static and seismic responses of the box culvert were analyzed using the finite difference code FLAC 2D and the results matched the experimental responses. The validated numerical model was then used to perform a parametric study, to evaluate the effects of: culvert geometric parameters, foundation locations and soil properties for the static loading and only the culvert geometric parameters for the seismic loading. The results have been evaluated for bending moment, soil pressure and soil culvert interaction factors. Based on these analyses, charts and equations are presented to help in assessing the design values of the static soil pressure, static bending moment, and the seismic bending moments around box culverts.
Download or read book Investigation of Soil structure Interaction written by Tien H. Wu and published by . This book was released on 1972 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil structure Interaction written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1972 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the introduction of corrugated metal pipe in the late 1890s, there has been a continuing interest in proper pipe usage for maintenance purposes. Early methods of design were truly "rule of thumb" and were developed through "failure criteria." Refinements of these methods resulted in a set of systems that were very effective in dealing with pipe problems. However, the building of the Institute Highway System brought with it a need to develop new approaches that would incorporate the latest soil-structure interaction theories and be applicable to the larger structures, higher embankments, and new materials. Better inspection and construction control are considered requisite to the utilization of more refined theories. Practice in the design and construction of culverts continues to improve, but, because many organizations have not been able to keep up with or apply the latest theories, the Highway Research Board Committee on Subsurface Soil-Structure Interaction organized a symposium to assess the state of the art and to delineate problems needing further attention.
Download or read book A Study of Soil structure Interaction Reinforced Concrete Culvert Pipes written by Tien H. Wu and published by . This book was released on 1971 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil structure Interaction Behavior of Reinforced Concrete Box Culverts written by Jey K. Jeyapalan and published by . This book was released on 1984 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil structure Interaction for Buried Box Culverts written by Mrinmoy Kanungo and published by . This book was released on 2008 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil structure Interaction of Rigid Cast in place Box Culverts Under High Embankments written by Olajide Samuel Oshati and published by . This book was released on 2011 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil structure Interaction of Subsurface Conduits written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1982 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long term Soil structure Interaction and Design of Large span Flexible Culverts written by Panayiotis Charilaou Papadopoulos and published by . This book was released on 1987 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pressure Distribution Around Rigid Culverts Considering the Soil structure Interaction Effects written by Eric Yvon Allard and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Heger's pressure distributions are considered a fundamental tool in the design of reinforced concrete culverts per the direct design method. However, there are some factors known to affect soil-structure interaction that are neglected when utilizing Heger's pressure distributions. These factors include the effect of the trench geometry, the relative stiffness of the existing and backfill soil, and the burial depth of the structure. This thesis presents a detailed finite-element analysis parametric study that investigates the accuracy and applicability of Heger's pressure distributions for culverts in partial trench installations when the aforementioned factors are considered. Additionally, a detailed pseudo-static finite-element analysis parametric study investigating the applicability and accuracy of the simplified seismic load combination presented in the Canadian Highway Bridge Design Code is presented."--Leaf ii
Download or read book Evaluating Existing Culverts for Load Capacity Allowing for Soil Structure Interaction written by William D. Lawson and published by . This book was released on 2010 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study explores culvert load rating practices and procedures as applied to the Texas Department of Transportation's (TxDOT's) archive of 1477 culvert designs and their inventory of more than 13,000 in-service reinforced concrete box culverts. The problem is that when older culverts are load-rated based on current AASHTO policy, many competent, serviceable culverts are shown to be deficient, requiring load posting, retrofit or replacement. A disconnect exists between culvert structural analysis practices and actual culvert performance. To address this challenge, the research focused on development of a clear, repeatable and reliable procedure for TxDOT engineers and their consultants to use for load rating culverts in the TxDOT roadway system. Articulated in TxDOT's Culvert Rating Guide, the new load rating procedure uses three increasingly-sophisticated analysis approaches, ranging from a direct stiffness frame model to a production-oriented finite element model which accounts for soil-structure interaction. Validation of the Culvert Rating Guide involved three major tasks. First, the researchers load-rated a statistically representative sample of 100 of TxDOT's culvert designs. Second, a parametric study was performed to evaluate six independent variables associated with culvert load rating. Third, instrumented load tests on three in-service culverts were conducted to compare measured demands with predicted values. This work showed that the analytical methods in the Culvert Rating Guide produce conservative load ratings yet still allow for reduction in excess over-conservatism in the load rating process.
Download or read book Soil structure Interaction in Rigid Culverts Installed in Induced Trenches written by Rodney P. McAffee and published by . This book was released on 2005 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Structure Interaction of Buried Culverts written by Jan Vaslestad and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil structure Interaction for Integral Bridges and Culverts written by Esra Bayoǧlu Flener and published by . This book was released on 2004 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Instrumentation for Soil and Rock written by Gary N. Durham and published by ASTM International. This book was released on 1999 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: These 28 papers presented at the American Society for Testing and Materials symposium held in June 1998 are organized by the major session topics of instrumentation associated with: soil structure interaction, monitoring landfills, and monitoring settlement and stability; and field data acquisition
