The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Mervyn J. Kowalsky - One of the best experts on this subject based on the ideXlab platform.
-
behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. KowalskyAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
-
Behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. Kowalsky, Paul ZiaAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
Hazim M. Dwairi - One of the best experts on this subject based on the ideXlab platform.
-
behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. KowalskyAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
-
Behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. Kowalsky, Paul ZiaAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
Paul Zia - One of the best experts on this subject based on the ideXlab platform.
-
Behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. Kowalsky, Paul ZiaAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
Matthew C. Wagner - One of the best experts on this subject based on the ideXlab platform.
-
behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. KowalskyAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
-
Behavior of instrumented prestressed high performance concrete bridge girders
Construction and Building Materials, 2010Co-Authors: Hazim M. Dwairi, Matthew C. Wagner, Mervyn J. Kowalsky, Paul ZiaAbstract:A comprehensive Monitoring of the behavior of four prestressed high performance concrete (HPC) bridge girders, with higher compressive strength, during construction and while In-Service, is presented. The Monitoring program covered instrumentation and Monitoring of a series of four girders during the casting operation, after construction, under the effects of traffic and thermal loads, as well as under controlled load conditions. Information regarding transfer length, prestress loss, heat of hydration, compressive strength, modulus of elasticity (MOE), modulus of rupture (MOR), creep, shrinkage, coefficient of thermal expansion, and chloride permeability of the concrete used is obtained and presented. Furthermore, the In-Service Monitoring and controlled load tests and details regarding thermal expansion, bridge stiffness, and load distribution factors are also presented. This paper provides details of testing of the concrete properties and field instrumentation of the bridge girders as well as a discussion of service level Monitoring and controlled load testing. Comparisons are made between experimental and theoretical results.
Y Takushima - One of the best experts on this subject based on the ideXlab platform.
-
Demonstration of correlation-based OTDR for In-Service Monitoring of 64-split TDM PON
Optics express, 2012Co-Authors: H. K. Shim, Y Takushima, K. Y. Cho, Yun Chur ChungAbstract:We demonstrate a correlation-based OTDR for the In-Service Monitoring of the 64-split TDM PON. For this purpose, we improve its dynamic range by using the pseudo-random noise sequence superimposed on the data signal.
-
optical reflectometry based on correlation detection and its application to the in service Monitoring of wdm passive optical network
Optics Express, 2007Co-Authors: Y Takushima, Y C ChungAbstract:We propose and demonstrate a novel technique for measuring the distribution of the reflectivity along an optical fiber transmission line. Unlike the conventional optical time-domain reflectometer (OTDR), the proposed technique utilizes the data-modulated transmitter itself instead of the optical short-pulse source, and monitors the distribution of the back-reflected light by calculating the cross-correlation of the transmitted and back-reflected signals. In this paper, we describe the operating principle of the proposed technique and discuss its potential limitation on the dynamic range. We also show that this limitation can be mitigated by using the discrete-component elimination algorithm. In addition, we experimentally demonstrate that the proposed technique can be used for the In-Service Monitoring of the transmission fibers in a wavelength-division multiplexed passive optical network (WDM PON).
-
in service monitor for group velocity dispersion of optical fibre transmission systems
Electronics Letters, 2001Co-Authors: Y Takushima, K KikuchiAbstract:A novel technique for In-Service Monitoring of the group-velocity dispersion (GVD) in optical fibre transmission systems is proposed. In this method, the transmission signal light itself acts as the probe light, and the GVD value at the operating wavelength can be obtained only from the received signal. We demonstrate the GVD monitor in a 9.953 Gbit/s transmission system using the proposed method.
