Journal of Highway and Transportation Research and Development (English Edition): Recent submissions
Now showing items 461-480 of 742
-
Study of Enhancement Coefficient of Washboard Road of Automobile Proving Ground
(American Society of Civil Engineers, 2009)By calculating the fatigue life of the sample vehicle and applying calculation method of road enhancement coefficient, the enhancement coefficient of washboard road was calculated and studied. Vehicle reliability test on ... -
Influence of Bus Voltage on Motor Torque and Efficiency in Fuel Cell Hybrid Powertrain
(American Society of Civil Engineers, 2009)In order to evaluate the influence of bus voltage on motor torque and efficiency, bench experiments were designed on a dynamic dynamometer. The torque and efficiency of three-phase asynchronous induction motor were measured ... -
Analysis and Design of SMC for EPS Based on FB/HB Switch
(American Society of Civil Engineers, 2009)Based on the established dynamic model of the electric power steering (EPS) system, the power actuation electric circuit of the EPS system and the power actuation principle of the full-bridge and half-bridge were analyzed, ... -
Research on Adaptability of Semi-rigid Material as Base Course for Long-life Asphalt Pavement
(American Society of Civil Engineers, 2010)In the light of semi-rigid material as base course for perpetual asphalt pavement, the bearing capacity and fatigue life of asphalt pavement with semi-rigid base cause and different asphalt layer’s thickness were computed ... -
Research on Heat Transfer Model of Asphalt Pavements Subjected to Microwave Heating Recycling
(American Society of Civil Engineers, 2010)In order to assess temperature field in microwave heating for recycling asphalt pavements, a 2D mathematic heat transfer model was developed based on Fourier heat transfer theory. The microwave internal heat-generation was ... -
Application of High-elastic Modified Asphalt in Steel Bridge Pavement
(American Society of Civil Engineers, 2010)To cope with the fatigue cracking occurred to the asphalt mixture on steel deck pavement, it is put forward that the fatigue life of asphalt mixture can be improved by reducing the failure energy of each hysteresis loop ... -
Experimental Study and Analysis of Influence of Automobile Service Factors on Fuel Economy
(American Society of Civil Engineers, 2009)Consulting a lot of literatures, the influence of automobile service factors (weather, terrain, driving style, etc) on fuel economy was analyzed. The influence of weather, terrain and road condition on fuel economy was ... -
Analysis of Performance of High Liquid-limit-soil Foundation Reinforced by Geogrids
(American Society of Civil Engineers, 2010)According to the features of high-liquid-limit foundation in southwest mountainous area and the characteristics of geogrid reinforced cushion, geogrid reinforced cushion was used to reinforce high-liquid foundation. By ... -
Comparative Study of PCA and ICA Based Traffic Flow Compression
(American Society of Civil Engineers, 2009)Data compression methods of traffic flow based on principle component analysis (PCA) and independence component analysis (ICA) were provided and compared. First, the statistical properties of freeway and urban road traffic ... -
Dynamic Response Analysis of Vehicle-bridge System for Cable-stayed bridge in Strong Windy Environment
(American Society of Civil Engineers, 2009)A computer simulation method of solving vehicle-bridge system vibration response with consideration of wind load was presented based on mode integration theory. Vehicle model and fluctuating wind load model was established, ... -
Study on Mechanical Properties of Support Structure of Deep Buried Tunnel Soft and Weak Surrounding Rock in High Situ Stress Area
(American Society of Civil Engineers, 2009)Mechanical properties of bolt, shotcrete, steel support structure of initial support and lining concrete were analyzed through elasto-plastic 3D finite-element numerical simulation of bench tunneling in high geo-stress ... -
Reconsideration of Problems in Transverse Distribution and Reinforcement of Beam-slab Bridge
(American Society of Civil Engineers, 2009)Based on theoretic analysis and calculation by establishing solid finite element model, the variance between mechanical hypothesis/simplification and the real structure and the changes of transverse distribution of bridge ... -
Research on Reduction Rate of CO and Smoke Criterion Emission in Road Tunnel Ventilation
(American Society of Civil Engineers, 2009)It is known that calculating the required amount of air is the rationale of the whole design of road tunnel ventilation and defining the reduction rate of CO and smoke criterion emission has also generates a great effect ... -
Design and Realization of Technical Demonstration System for Intelligent Highway System
(American Society of Civil Engineers, 2009)During the period of the 14th World Congress on ITS, a technical demonstration about the Intelligent Highway System was organized by Research Institute of Highway (ITSC) in the proving ground for highway and traffic ... -
Investigation on Crack of Long-span Prestressed Concrete Box Girder Bridges in Service
(American Society of Civil Engineers, 2009)A research was performed for crack pathology of prestressed concrete box girder bridge (PCBGB). Cracking information of PCBGB in national scope was collected and investigated. Main crack types, distributing pattern and ... -
Dynamic Parameters Identification and Finite Element Model Updating for Continuous Rigid Frame Bridge
(American Society of Civil Engineers, 2009)A three dimensional FE model of a long-span prestressed continuous rigid frame bridge was constructed and the modal analysis was performed by using ANSYS. The real dynamic parameters of this bridge were identified by using ... -
Analysis on Stress of Pavement with Different Crack Statuses in Base
(American Society of Civil Engineers, 2009)In order to compare stress responses in pavement structure with various base states under vehicle load, finite element method were used to establish the model for different projects, and then distribution of stresses in ... -
Application of Modified Secant Modulus Method in Settlement Calculation
(American Society of Civil Engineers, 2009)In order to calculate the settlement of foundation accurately, an undisturbed-soil modified secant modulus method was putted forward on the basis of the existing research results. The theory of traditional secant modulus ... -
Analysis of Stability of Pile Foundation with Higher Pile-column Bridge Piers
(American Society of Civil Engineers, 2009)Based on difference between pile foundation with higher pile-column bridge piers and normal pile foundation and taken interaction of pile, pier and soil into account, a pile-column calculation model was founded. On the ... -
Research on Concrete Vertical Precompressive Stress Field at Webs of Box Girder Bridge
(American Society of Civil Engineers, 2009)Based on Fourier series, an analytic formula for analyzing the prestress in the web of box girder with single bar was deduced through simplifying the action of single vertical prestress bar as a couple of concentrated ...