The Indian River Inlet Bridge

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The Indian River Inlet Bridge

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Author : Timothy Jeffrey Stuffle
language : en
Publisher:
Release Date : 2006

The Indian River Inlet Bridge written by Timothy Jeffrey Stuffle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Bridges categories.

The University of Delaware's Center for Innovative Bridge Engineering (CIBrE) developed an instrumentation and monitoring program for a proposed 1,000 foot concrete tied arch bridge over the Indian River Inlet in Southern Delaware. That bridge will not be built due to budgetary constraints, however, a new bridge is still needed. It is believed that the new bridge, which will be instrumented and monitored by CIBrE, will be a cable-stayed bridge. This thesis examines the Indian River Inlet site, the proposed arch bridge and instrumentation plan, and cable-stayed bridge related issues. The Indian River Inlet site and the proposed arch bridge are introduced. The expectation of a cable-stayed bridge being built at the inlet is explained. The history and evolution of cable-stayed bridges are examined. Terminology and structural systems relevant to modern cable-stayed bridges are introduced. Behavior of cable-stayed bridges is explored through use of simplified models which represent the limiting conditions of actual bridges. The phenomenon of stay-cable vibration is also discussed briefly. Finally, conclusions about the behavior of cable-stayed bridges and how that relates to the monitoring of a cable-stayed bridge at the Indian River Inlet site are made.

Indian River Inlet Bridge And Bathymetry Scour Monitoring System

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Author : Jesse Thomas Hayden
language : en
Publisher:
Release Date : 2009

Indian River Inlet Bridge And Bathymetry Scour Monitoring System written by Jesse Thomas Hayden and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Bridges categories.

Mention the Indian River Inlet Bridge to any Delawarean and they will surely ask if it is safe to use. The scour problems that have plagued the current bridge for the past 30 years are common knowledge, and public concern over the safety of the bridge pushed the Delaware Department of Transportation (DelDOT) to team up with the University of Delaware to design and install a custom system to monitor the bridge. The Indian River Inlet Bridge and Bathymetry Scour Monitoring Sys- tem (BBSMS) employs tilt sensors, scanning sonar, and current profilers to return a variety of information that DelDOT engineers can use to determine the bridge integrity and ensure the safety of the public. Results from the BBSMS are combined with earlier field surveys to analyze the morphodynamics associated with the giant scour holes. Observations from two different current profiler deployments and a thermal camera investigation corroborate the presence and significance of macroturbulence in suspending and transporting sediment out of the inlet. The flow pattern behind the rise in bathymetry located under the bridge is studied in detail during ebb tide, as the macroturbulence generated by the ebbing tide is thought to be responsible for the ongoing local scour threatening the bridge. The two sonars of the BBSMS are able to return bathymetry data from approximately 25; 000 m 2 of the channel bed twice per day; and the resulting maps of the channel are geo-referenced for viewing in Google Earth to give DelDOT engineers a powerful, yet easy to use, decision making tool. Transfer and processing of all of the BBSMS data are performed automatically, returning high value information while reducing the daily cost of operation of the near-real time system. The BBSMS will be a vital tool for DelDOT engineers until the replacement bridge completely spanning the Indian River Inlet is completed in late 2011.

Julian Coco In De Eerste Plaats Mens Dan Pas Antilliaan

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Author :
language : en
Publisher:
Release Date : 1975

Julian Coco In De Eerste Plaats Mens Dan Pas Antilliaan written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.

Structural Modeling Of The Indian River Inlet Bridge Under Current And Potential Scour Conditions

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Author :
language : en
Publisher:
Release Date : 2009

Structural Modeling Of The Indian River Inlet Bridge Under Current And Potential Scour Conditions written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Bridges categories.

The Indian River Inlet Bridge is located along the coast of southern Delaware, and provides an important connection to some of Delaware's most popular tourist areas. The bridge is a five-span steel girder structure crossing almost 1,000 ft of water. Strong tidal flows at the inlet have caused significant scour holes to form on both sides of the in-water piers in the direction of flow. The scour has become so severe that the Delaware Department of Transportation (DelDOT) has recognized a need for and installed a monitoring system to help monitor the stability of the bridge. The monitoring system consists of tilt sensors placed at the top of each of the in-water piers to monitor any movements that may occur as a result of the scour. This data is used in the current study to assess the current structural health and stability of the bridge. This thesis describes the steps taken to identify the potential effects of the scour on the strength of the bridge and the development of structural analysis tools that may be used to predict bridge performance based on current and future monitoring data. To accomplish these goals, background information is first provided on Indian River Inlet Bridge and the issue of scour. Second, details on the tilt sensors and data collected at the bridge are described. Third, an analysis of the bridge substructure is detailed including a pile capacity analysis for the piers and a pushover capacity analysis of the pier under lateral loads. Fourth, a finite element model of the superstructure is presented to determine how movement of the piers may affect the stress levels in the girders and deck. Finally, conclusions are made on the current and future strength and stability of the bridge in its present state and if the scour should increase. From this analysis it is predicted that the current magnitude of lateral movement of the piers is not likely to cause structural instability of the bridge. A discussion of potential effects should the scour conditions exacerbate is also included.

Calculating Deflections Of The Indian River Inlet Bridge Using Rotations From A Structural Health Monitoring System

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Author : Ashley Bechtold
language : en
Publisher:
Release Date : 2017

Calculating Deflections Of The Indian River Inlet Bridge Using Rotations From A Structural Health Monitoring System written by Ashley Bechtold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

As the age of bridges worldwide increase, and their structural integrities decrease, the need for ways to evaluate and monitor the ever changing structural health of bridges has become more crucial. One monitoring method that has recently gained popularity worldwide is the use of structural health monitoring systems. Structural health monitoring systems allow bridge owners to continuously monitor parameters that can be used to assess a bridge’s structural health. Two such parameters are strain and rotation. While structural health monitoring systems have advanced over the years, bridge owners still lack simple methods for analyzing certain types of structural health monitoring data in order to evaluate the structural integrity of their bridges. One example is the monitoring and evaluation of bridge rotations. While rotations can offer insight into a bridge’s deflections, they have not been thoroughly investigated and introduced to the bridge industry. ☐ In this research, rotation data from a structural health monitoring system on the Indian River Inlet Bridge, and two additional surface mounted tilt meters, was analyzed and used to calculate bridge deflections. The methodology behind calculating bridge deflections from rotation data is based on elastic beam theory and the double integration method. In order to obtain the rotation data for the analyses, a controlled load test was conducted on the Indian River Inlet Bridge in May of 2016. During that load test, a survey crew was onsite to measure the deflection of the bridge. The deflections that were calculated using structural health monitoring system rotation data were compared to the measured defections. The final calculated Load Pass 0_1 midspan deflection was off from the survey midspan deflection by about 16%. The final calculated Load Pass 0_2 midspan deflection was off from the survey midspan deflection by about 14%. Through these comparisons of calculated deflections to survey deflections, the methodology used to calculate deflections from rotation data was validated. The deflections that were predicted by a validated finite element analysis (FEA) of the bridge were also compared to measured survey deflections. The FEA model midspan deflection was off from the survey midspan deflection by about 9%, which suggests that FEA can be used to produce both rotations and deflections.

Model Calibration Of The Indian River Inlet Bridge Using Structural Health Monitoring Strain Data

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Author : Cortney Natalicchio
language : en
Publisher:
Release Date : 2018

Model Calibration Of The Indian River Inlet Bridge Using Structural Health Monitoring Strain Data written by Cortney Natalicchio and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.

Structural health monitoring (SHM) of civil engineering structures has many benefits in monitoring and maintenance and has become increasingly prevalent due to the deteriorating condition of today’s infrastructure. In order to gain the full potential of the data obtained through SHM a finite element structural model can be calibrated with the measured data to create a model that more accurately represents the as-built structure. Manual calibrations have been performed for a long time; however, this is a very time-intensive process. A method to perform automated calibrations is necessary in the civil engineering field to keep up with volume of data obtained through SHM systems. Recognizing this need for automated structural model calibrations with large SHM data sets, Bentley Systems, Inc. has developed a prototype software calibration tool. This research focuses on the calibration of the Indian River Inlet Bridge’s finite element model with strain data using Bentley Systems’ calibration tool. The calibration tool had yet to be tested on a complex bridge structure using strain data, which was the driving force for the collaboration between University of Delaware and Bentley Systems, Inc. on this research. ☐ A 3D STAAD.Pro model of the Indian River Inlet Bridge was used in the study. The parameter that was optimized through the calibrations was the elastic modulus of the edge girders; the input response was SHM strain data from controlled load tests. Due to the variability of concrete along the length of the bridge, the elastic modulus is not constant along the length. Through various calibrations the optimized model of the IRIB showed good results when compared to the SHM strain response and the concrete edge girder 56-day compressive strength tests. The calibrated model proves to be a close representation of the as-built structure and was validated using different loading configurations. The calibrated model had a 67% improvement relative to the design model in matching the measured strain response from the controlled load tests and an average compressive strength 11% greater than the 56-day compressive strength tests.

The Indian River Inlet Cable Stayed Bridge The Effect Of Wind Speed And Direction On Estimates Of Stay Cable Forces

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Author : Shaymaa Khudhair Obayes
language : en
Publisher:
Release Date : 2017

The Indian River Inlet Cable Stayed Bridge The Effect Of Wind Speed And Direction On Estimates Of Stay Cable Forces written by Shaymaa Khudhair Obayes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

The objective of this study is to estimate the tension in the stay cables of the Indian River Inlet bridge using measured cables vibrations in conjunction with dynamic cable theory. In addition, to evaluate the effect of the wind speed and direction on the ability to estimate the stay cable forces. A MATLAB script is developed to automate the data processing, using spectral density techniques to identify the cable natural frequencies and from these, estimate the tension. Making use of taut cable theory, which combines frequencies and tension force in a relationship, one can be extracted by relying on the other. The acceleration data that is considered for analysis purpose in this study is from two wind events: Winter Storm Jonas January, 23rd 2016, and Hurricane Matthew October, 9th 2016. The results show that the taut string theory is an accurate and straightforward method to estimate cable force by knowing the natural frequency of the cable. From the analysis work, it is seen that all the estimated tensions were approximately within the ultimate maximum and minimum ranges from the construction requirements with different percentages of no more than 15%. For average or gust wind speeds between 25 mph and 55 mph, the tension in the stay cables can be estimated without requirement for certain characteristics using taut cable theory. In addition, the directions from north or north east for the wind data provide acceptable data for estimating the tension in the stay cables. moreover, there is not enough information to determine the validity of other directions to estimate tension for cables.

Charles W Cullen Bridge

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Author :
language : en
Publisher:
Release Date : 2016

Charles W Cullen Bridge written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Indian River Inlet

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Author : United States. Army. Corps of Engineers. Committee on Tidal Hydraulics
language : en
Publisher:
Release Date : 1994

Indian River Inlet written by United States. Army. Corps of Engineers. Committee on Tidal Hydraulics and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Erosion categories.

Tracings: G248(Indian River Inlet).

Safety And Reliability Of Bridge Structures

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Author : Khaled Mahmoud
language : en
Publisher: CRC Press
Release Date : 2009-09-21

Safety And Reliability Of Bridge Structures written by Khaled Mahmoud and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-21 with Technology & Engineering categories.

Recent surveys of the U.S. infrastructure‘s condition have rated a staggering number of bridges structurally deficient or functionally obsolete. While not necessarily unsafe, a structurally deficient bridge must be posted for weight and have limits for speed, due to its deteriorated structural components. Bridges with old design features that canno