The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Soon Hoe Chew - One of the best experts on this subject based on the ideXlab platform.
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development of new multi layer Pavement System subjected to blast load full scale field blast trial
2018Co-Authors: Hong Wei Andy Tan, Soon Hoe ChewAbstract:The proposed multi-layer Pavement System will be tested in the full scale field trial test to evaluate its resistance against blast load. The dynamic response of the proposed multi-layer Pavement System under blast loading will be explored and analyzed.
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Development of New Multi-Layer Pavement System Subjected to Blast Load—Full Scale Field Blast Trial
Springer Tracts in Civil Engineering, 2017Co-Authors: Hong Wei Andy Tan, Soon Hoe ChewAbstract:The proposed multi-layer Pavement System will be tested in the full scale field trial test to evaluate its resistance against blast load. The dynamic response of the proposed multi-layer Pavement System under blast loading will be explored and analyzed.
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field performance and numerical modeling of multi layer Pavement System subject to blast load
Construction and Building Materials, 2014Co-Authors: Soon Hoe ChewAbstract:Abstract In this paper, a new multi-layer Pavement System subject to blast load was developed. This multi-layer Pavement System consisted of Asphalt Concrete (AC) layer reinforced with Geogrid (GST), followed by High Strength Concrete (HSC) layer and then Engineered Cementitious Composites (ECC) layer, taking into account their relative advantages in terms of strength and relative ductility. A series of field blast test was conducted to evaluate the behavior of the new multi-layer Pavement in the field condition. Two Pavement slabs were cast and tested. One is a normal concrete Pavement, as control, and the other is the new multi-layer Pavement. It was found that the new multi-layer Pavement performed better than conventional Pavement System when subjected to blast load. At the same time, a 3D finite element numerical modeling is employed to evaluate the dynamic behavior of the normal concrete Pavement and the new multi-layer Pavement System subject to blast load. For this modeling, a 3D dynamic numerical model using LSDYNA with appropriate material models and suitable boundary conditions are developed. Actual measurements from the field blast test were used as a validation for the numerical model developed. It was shown that the results from numerical model and field blast test measurements compared very well in terms of damage pattern, crater diameter, acceleration and total pressure cell readings. It is also observed that the new multi-layer Pavement System had better blast resistance than conventional Pavement System. The developed 3D numerical model using LSDYNA seems to be able to model the real behavior of the Pavement subjected to blast load.
Xiu Liu - One of the best experts on this subject based on the ideXlab platform.
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experimental study on interlayer shear properties of ers Pavement System for long span steel bridges
Construction and Building Materials, 2017Co-Authors: Xiu Liu, Changjun Zhou, Decheng Feng, Xiaohu Fan, Sainan XieAbstract:Abstract Multi-layer asphalt concrete Pavement System on long-span steel bridges is subject to a complex stress and strain state due in part to frequent vehicular braking and accelerating actions and also to relatively weak bond interfaces between Pavement layers. In particular, the interlayers are vulnerable to shear activities induced by the aforementioned vehicular actions, leading to spalling, loosening and shoving failures of the Pavement. In this study, the interlayer shear performance is investigated experimentally using an innovative test device loaded on existing MTS. Best practices for interlayer composition are proposed based on shear test results, including bonding material and dosage, crushed stone size and dosage, pre-coating treatment of crushed stones, and layer surface treatment. Sensitivity analyses of loading rate and temperature on the interlayer shear performance are conducted as well. It is found that bonding material and surface treatment both can significantly influence the interlayer shear strength. Moreover, slower shear rate and higher temperature can cause poorer interlayer shear performance triggering onset of interlayer shear failures.
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Investigation on the Bending Fatigue and Shear Failure in Steel Bridge Deck Pavement Systems
Journal of Testing and Evaluation, 2015Co-Authors: Xiu Liu, Decheng Feng, Hao Tang, Changjun ZhouAbstract:Bridge deck Pavement layers are prone to bending fatigue and shear failure because of the continuous vibration, the vertical instant impact, and horizontal dynamic shear effect from vehicles onto the Pavement System. To ensure the durability of Pavement Systems, a typical Pavement System on a steel bridge was studied through numerical simulation and laboratory tests. The maximum tensile stress at the bottom layer and the maximum interlayer shear stress of bridge deck Pavement were obtained under different loading conditions in numerical simulations. Then direct shear tests were conducted to study the fatigue characteristics of bridge deck Pavement materials and structure. Finally, the fatigue resistance of the asphalt Pavement System was investigated under the typical traffic level in the northeast of China. This study is helpful to design steel bridge deck Pavement Systems with good bending fatigue and shear resistance.
Changjun Zhou - One of the best experts on this subject based on the ideXlab platform.
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experimental study on interlayer shear properties of ers Pavement System for long span steel bridges
Construction and Building Materials, 2017Co-Authors: Xiu Liu, Changjun Zhou, Decheng Feng, Xiaohu Fan, Sainan XieAbstract:Abstract Multi-layer asphalt concrete Pavement System on long-span steel bridges is subject to a complex stress and strain state due in part to frequent vehicular braking and accelerating actions and also to relatively weak bond interfaces between Pavement layers. In particular, the interlayers are vulnerable to shear activities induced by the aforementioned vehicular actions, leading to spalling, loosening and shoving failures of the Pavement. In this study, the interlayer shear performance is investigated experimentally using an innovative test device loaded on existing MTS. Best practices for interlayer composition are proposed based on shear test results, including bonding material and dosage, crushed stone size and dosage, pre-coating treatment of crushed stones, and layer surface treatment. Sensitivity analyses of loading rate and temperature on the interlayer shear performance are conducted as well. It is found that bonding material and surface treatment both can significantly influence the interlayer shear strength. Moreover, slower shear rate and higher temperature can cause poorer interlayer shear performance triggering onset of interlayer shear failures.
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Investigation on the Bending Fatigue and Shear Failure in Steel Bridge Deck Pavement Systems
Journal of Testing and Evaluation, 2015Co-Authors: Xiu Liu, Decheng Feng, Hao Tang, Changjun ZhouAbstract:Bridge deck Pavement layers are prone to bending fatigue and shear failure because of the continuous vibration, the vertical instant impact, and horizontal dynamic shear effect from vehicles onto the Pavement System. To ensure the durability of Pavement Systems, a typical Pavement System on a steel bridge was studied through numerical simulation and laboratory tests. The maximum tensile stress at the bottom layer and the maximum interlayer shear stress of bridge deck Pavement were obtained under different loading conditions in numerical simulations. Then direct shear tests were conducted to study the fatigue characteristics of bridge deck Pavement materials and structure. Finally, the fatigue resistance of the asphalt Pavement System was investigated under the typical traffic level in the northeast of China. This study is helpful to design steel bridge deck Pavement Systems with good bending fatigue and shear resistance.
Decheng Feng - One of the best experts on this subject based on the ideXlab platform.
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experimental study on interlayer shear properties of ers Pavement System for long span steel bridges
Construction and Building Materials, 2017Co-Authors: Xiu Liu, Changjun Zhou, Decheng Feng, Xiaohu Fan, Sainan XieAbstract:Abstract Multi-layer asphalt concrete Pavement System on long-span steel bridges is subject to a complex stress and strain state due in part to frequent vehicular braking and accelerating actions and also to relatively weak bond interfaces between Pavement layers. In particular, the interlayers are vulnerable to shear activities induced by the aforementioned vehicular actions, leading to spalling, loosening and shoving failures of the Pavement. In this study, the interlayer shear performance is investigated experimentally using an innovative test device loaded on existing MTS. Best practices for interlayer composition are proposed based on shear test results, including bonding material and dosage, crushed stone size and dosage, pre-coating treatment of crushed stones, and layer surface treatment. Sensitivity analyses of loading rate and temperature on the interlayer shear performance are conducted as well. It is found that bonding material and surface treatment both can significantly influence the interlayer shear strength. Moreover, slower shear rate and higher temperature can cause poorer interlayer shear performance triggering onset of interlayer shear failures.
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Investigation on the Bending Fatigue and Shear Failure in Steel Bridge Deck Pavement Systems
Journal of Testing and Evaluation, 2015Co-Authors: Xiu Liu, Decheng Feng, Hao Tang, Changjun ZhouAbstract:Bridge deck Pavement layers are prone to bending fatigue and shear failure because of the continuous vibration, the vertical instant impact, and horizontal dynamic shear effect from vehicles onto the Pavement System. To ensure the durability of Pavement Systems, a typical Pavement System on a steel bridge was studied through numerical simulation and laboratory tests. The maximum tensile stress at the bottom layer and the maximum interlayer shear stress of bridge deck Pavement were obtained under different loading conditions in numerical simulations. Then direct shear tests were conducted to study the fatigue characteristics of bridge deck Pavement materials and structure. Finally, the fatigue resistance of the asphalt Pavement System was investigated under the typical traffic level in the northeast of China. This study is helpful to design steel bridge deck Pavement Systems with good bending fatigue and shear resistance.
Nader Tabatabaee - One of the best experts on this subject based on the ideXlab platform.
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INFLUENCE OF VEHICLE SPEED ON DYNAMIC LOADS AND Pavement RESPONSE
Transportation Research Record, 1993Co-Authors: Peter E. Sebaaly, Nader TabatabaeeAbstract:Weigh-in-motion Systems have been used extensively to measure dynamic loads imparted by traffic vehicles. One of the major uses of these load data is to evaluate the equivalent single-axle loads (ESALs) generated by each load level. The cumulative ESALs are then used in the design or rehabilitation procedures, or both, for the existing road. In situ Pavement response parameters, such as the strains at the bottom of the asphalt concrete layer, can also be used to evaluate ESALs. The findings of a research program aimed at evaluating the effect of vehicle speed on the measured dynamic loads and Pavement response are documented. The data were measured through a full-scale field experiment. The analyses of the data indicated that vehicle speed has a significant effect on both the measured dynamic loads and the actual response of the Pavement System. However, the effects of vehicle speed on dynamic loads and Pavement response are not identical. For example, higher vehicle speed generates higher dynamic loads, whereas the strains at the bottom of the asphalt concrete layer are significantly reduced as the speed increases. This discrepancy has been shown to have a great impact on the final design of the Pavement System.