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SHM-based F-AHP bridge rating system with application to Tsing Ma Bridge

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Frontiers of Structural and Civil Engineering 2011年第4期5卷 465-478页

作者： Qi LI You-lin XU Yue ZHENG An-xin GUO Kai-yuen WONG Yong XIA Department of Bridge Engineering Tongji UniversityShanghai 200092China Department of Civil and Structural Engineering The Hong Kong Polytechnic UniversityHong KongChina school of Civil Engineering Harbin Institute of TechnologyHarbin 150090China Bridges&Structures Division Hong Kong Highways DepartmentHong KongChina

This paper aims at developing a structural health monitoring(SHM)-based bridge rating method for bridge inspection of long-span cable-supported *** fuzzy based analytic hierarchy approach is employed,and the hierarchical structure for synthetic rating of each structural component of the bridge is *** criticality and vulnerability analyses are performed largely based on the field measurement data from the SHM system installed in the bridge to offer relatively accurate condition evaluation of the bridge and to reduce uncertainties involved in the existing rating *** procedures for determining relative weighs and fuzzy synthetic ratings for both criticality and vulnerability are then *** fuzzy synthetic decisions for inspection are made in consideration of the synthetic ratings of all structural *** SHM-based bridge rating method is finally applied to the Tsing Ma suspension bridge in Hong Kong as a case *** results show that the proposed method is feasible and it can be used in practice for longspan cable-supported bridges with SHM system.

关键词： structural health monitoring(SHM) bridge rating method fuzzy based analytic hierarchy approach criticality and vulnerability rating Tsing Ma Bridge

Geohazards and risk assessment along highway in Sichuan Province, China

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Journal of Mountain Science 2023年第6期20卷 1695-1711页

作者： YANG Hong-zhi DONG Jia-yu GUO Xu-liang school of Highway Chang’an UniversityXi'an 710064China

Geohazards along highways are the main natural hazards that could affect the safety and operation of highway *** the risks faced by highways in areas affected by geohazards is an urgent problem to be *** study used historical geohazard events from Sichuan Province and highway network data to propose a geohazard risk index that reflects the risk geohazards along ***,this work applied the entropy method and expert scoring to calculate the weight of the *** spatial distributions of landslides,debris flows,collapses,and unstable slopes along the highways were analysed based on ArcGIS spatial statistics,and the highway geohazard intensity index were *** relationships between slope,rainfall,vegetation coverage,rock type,land use,and incision depth with geohazards were analysed,and the highway geohazard susceptibility index was calculated by the weighted information *** on the intensity and susceptibility index,we obtained a geohazard risk index which can better evaluate the risk of highways,and made a highway geohazard risk map to aid the prevention and mitigation of geohazards along highways and assist with highway network planning.

关键词： Geohazards Highway network Geohazard risk index Intensity index Susceptibility

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自动驾驶汽车用户接受度的中美差异

科学技术与工程 2021年第15期21卷 6487-6493页

作者：秦华张然王培北京建筑大学机电与车辆工程学院北京102616 Partners for Advanced Transit and highways University of California Berkeley 94804 USA

当前处于半自动驾驶向全自动驾驶过渡的关键时期,为探究中美自动驾驶汽车终端用户的接受度差异,分别针对北京和旧金山湾区各20名特斯拉车主,采用结构式访谈法对车主半自动驾驶汽车的用车情况、对全自动驾驶汽车的认知态度进行实证研究... 详细信息

当前处于半自动驾驶向全自动驾驶过渡的关键时期,为探究中美自动驾驶汽车终端用户的接受度差异,分别针对北京和旧金山湾区各20名特斯拉车主,采用结构式访谈法对车主半自动驾驶汽车的用车情况、对全自动驾驶汽车的认知态度进行实证研究。通过对两地结果进行比较,发现两地特斯拉用户背景、购买动机无明显差异;而购买顾虑、半自动驾驶系统使用频率、全自动驾驶汽车保留手动控制意愿、接受度的重要影响因素、对共享自动驾驶的态度、愿意共享的原因差异明显。中美两地的显著差异说明自动驾驶汽车的发展需要因地制宜,而拓宽研究对象范围、重视终端用户的反馈将为全自动驾驶乃至共享自动驾驶汽车融入城市道路起到促进作用。

关键词：智能交通自动驾驶汽车用户接受度中美差异

Architecture,application,and prospect of digital twin for highway infrastructure

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第5期11卷 835-852页

作者： Yue Wang Huimin Wang Weiming Wang Shizhao Song Xin Fu school of Highway Chang'an UniversityXi'an 710064China school of Transportation Engineering Chang'an UniversityXi'an 710064China Jingxiong Planning Office of Hebei Provincial Expressway Baoding 071700China

The years we are experiencing are often identified as those of the age of digital technologies,where“digital”is commonly associated with intelligence,efficiency,and *** emergence of digital technologies has significantly impacted and transformed various aspects of our society compared to the *** this panorama,some arising questions regard transportation infrastructure systems and,first of all,highway *** research focuses on one central issue:how highways fit into this digital ***,the work in this paper can be described as *** there are many different theoretical model systems for the architecture of the digital twin,we have chosen to review the main body of research on the digital twin in highway infrastructure based on a relatively well-established modeling framework,the five-dimensional model of the digital *** discussing the components of the digital twin for highway infrastructure's five-dimensional model,the paper reviews some innovative technologies that make these items *** addition to this,the digital twin maturity level of highway infrastructure and the MBSE-based(model-based systems engineering)digital twin model for highway are also discussed in this ***,the paper provides a bird's eye view of this extremely dynamic technology for a new system of intelligent highways and discusses some of their criticalities and strengths,allowing for the optimization and development of new transportation functions and services,improving the adaptability of highways to the digital revolution.

关键词： Digital infrastructure Intelligent highway Digital twin Five-dimensional model Digital twin maturity

Preliminary slope stability analysis and discontinuities driven susceptibility zonation along a crucial highway corridor in higher Himalaya, India

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Journal of Mountain Science 2020年第4期17卷 801-823页

作者： Barsa ACHARYA Kripamoy SARKAR Ashok Kumar SINGH Sowmiya CHAWLA Department of Applied Geology Indian Institute of Technology(Indian School of Mines)Dhanbad826004India Department of Civil Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad826004India

Identification of failure susceptible slopes through different rock engineering approach is highly valuable in landslide risk management along crucial highway corridors in the high mountainous region. In this study, a critical highway(NH-5) segment in higher Himalaya has been investigated using the various rock mass characterization schemes based on detailed field observations. Since the highway corridor is highly susceptible to discontinuities-driven failures, consisting of jointed rock masses;Mean and Combined kinematic feasibility analysis has been performed for 20 highway slopes. Observed slope mass classes have been compared to the feasibility percentage of discontinuities driven failures(wedge, toppling, and planar) and accordingly the kinematic feasibility zonation along highway segment has been done for each as well as overall failure types. Based on the slope mass conditions and discontinuities driven failures probability(%), responsive remedial measures have been proposed for individual highway slopes to ensure safe and uninterrupted transportation.

关键词： Slope characterization Kinematic analysis Failure zonation map Himalayan highways Landslide Slope stability

The changes of community components and their horizontal patterns caused by highway construction in the Longitudinal Range-Gorge Region

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Chinese Science Bulletin 2007年第A02期52卷 213-224页

作者： LIU Jie CUI BaoShan DONG ShiKui WANG Juan ZHAO ShuQing school of Environment Beijing Normal University Beijing 100875 China

拿 Dabao (从达利城市到 Baoshan 城市)并且 Sixiao (从 Simao 城市到 Xiaomengyang 镇)在例子，社区部件的变化和他们的水平模式由高速公路建设引起了的纵的范围峡区域的高速公路与一些数学方法在这篇文章被讨论，例如对比分析，差别... 详细信息

拿 Dabao (从达利城市到 Baoshan 城市)并且 Sixiao (从 Simao 城市到 Xiaomengyang 镇)在例子，社区部件的变化和他们的水平模式由高速公路建设引起了的纵的范围峡区域的高速公路与一些数学方法在这篇文章被讨论，例如对比分析，差别分析等等。结果显示：1 ) 在高速公路建设，占优势的种类和亚 predominant 的骚乱下面，路边上的乔木和灌木植物的种类数量将减少到某程度，草本的植物的将增加很多，并且某入侵的种类将出现并且散布。2 ) 在路边上由高速公路建设，占优势的种类的分布和亚 predominant 种类影响了将从制服或随机的模式变化聚集模式，并且他们的总数度和扩散性将显然增加。3 ) 道路附近的 Ageratina adenophora 和 Chromolaena odorata 的平均范围度和高度远比那高离开道路，但是 2 种类的频率没在 200 m 以内在路边上有明显的变化。4 ) 道路节的位置和地形也是影响社区部件的重要因素，社区部件上的影响紧张由 Dabao 高速公路引起了的计算结果表演比由 Sixiao 高速公路，和在 2 不同地形会之间的影响紧张的比较结果引起了的高：山腹 > 山顶。

关键词：纵向岭谷区公路建筑物生态系统

SceGAN:A method for generating autonomous vehicle cut-in scenarios on highways based on deep learning

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Journal of Intelligent and Connected Vehicles 2023年第4期6卷 264-274页

作者： Lan Yang Jiaqi Yuan Xiangmo Zhao Shan Fang Zeyu He Jiahao Zhan Zhiqiang Hu Xia Li school of Information Engineering Chang’an UniversityXi’an 710064China

With the increasing level of automation of autonomous vehicles,it is important to conduct comprehensive and extensive testing before releasing autonomous vehicles into the *** public road and closed-field testing failed to meet the requirements of high testing efficiency and scenario ***,scenario-based autonomous vehicle simulation testing has *** scenarios form the basis of simulation *** additional scenarios from an existing scenario library is a significant *** the scenarios of a proceeding vehicle cutting into an adjacent lane on highways as an example,based on an autoencoder and a generative adversarial network(GAN),a method that combines Transformer to capture the features of a long-time series,called SceGAN,is proposed to model and generate scenarios of autonomous vehicles on *** evaluation system is established to analyze the reliability of SceGAN using discriminative and predictive scores and further evaluate the effect of scenario generation in terms of similarity and *** showed that compared with TimeGAN and AEGAN,SceGAN is superior in data fidelity and availability,and their similarity increased by 27.22%and 21.39%,*** coverage increased from 79.84%to 93.98%as generated scenarios increased from 2,547 to 50,000,indicating that the proposed method has a strong generalization capability for generating multiple trajectories,providing a basis for generating test scenarios and promoting autonomous vehicle testing.

关键词： scenario generation autonomous vehicles testing cut-in transformer generative adversarial network(GAN)

Network level pavement evaluation with 1 mm 3D survey system

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第6期2卷 391-398页

作者： Kelvin C.P.Wang Qiang Joshua Li Guangwei Yang You Zhan Yanjun Qiu school of Civil and Environmental Engineering Oklahoma State University school of Civil Engineering Southwest Jiaotong University

The latest iteration of PaveVision3D Ultra can obtain true 1 mm resolution 3D data at full- lane coverage in all 3 directions at highway speed up to 60 mph. This paper introduces the PaveVision3D Ultra technology for rapid network level pavement survey on approximately 1280 center miles of Oklahoma interstate highways. With sophisticated automated distress analyzer （ADA） software interface, the collected 1 mm 3D data provide Oklahoma Department of Transportation （ODOT） with comprehensive solutions for automated eval- uation of pavement surface including longitudinal profile for roughness, transverse profile for rutting, predicted hydroplaning speed for safety analysis, and cracking and various surface defects for distresses. The pruned exact linear time （PELT） method, an optimal partitioning algorithm, is implemented to identify change points and dynamically deter- mine homogeneous segments so as to assist ODOT effectively using the available 1 mm 3D pavement surface condition data for decision-making. The application of 1 mm 3D laser imaging technology for network survey is unprecedented. This innovative technology allows highway agencies to access its options in using the 1 mm 3D system for its design and management purposes, particularly to meet the data needs for pavement management system （PMS）, pavement ME design and highway performance monitoring system （HPMS）.

关键词： PaveVision3D Ultra Rapid network survey Pavement surface evaluation Dynamic segmentation

Using random-parameter and fixed-parameter ordered models to explore temporal stability in factors affecting drivers' injury severity in single-vehicle collisions

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Journal of Traffic and Transportation Engineering(English Edition) 2019年第2期6卷 132-146页

作者： Essam Dabbour Murtaza Haider Eman Diaa College of Engineering Abu Dhabi University Ted Rogers school of Management Ryerson University

Understanding the temporal stability in the factors influencing drivers' injury severity in single-vehicle collisions would help evaluating the effectiveness of implementing different safety treatments so that researchers could understand whether any safety improvements,observed after applying a certain safety treatment, are attributed to the specific treatment or simply attributed to the temporal instability of the factors being addressed. This study investigates the temporal stability of the factors affecting drivers' injury severity in singlevehicle collisions involving light-duty vehicles. The study is based on utilizing ordinal regression modeling to analyze the severity of drivers' injuries in all police-reported lightduty single-vehicle collisions that occurred in North Carolina from January 1, 2007, to December 31, 2013. A separate regression model was estimated for each year so that statistical significance of each risk factor may be compared over the years. The study also estimated random-parameter(mixed) ordered logit models to explore the heterogeneity in data. The most significant factor that was found to increase the severity of drivers' injuries in light-duty single-vehicle collisions is driving under the influence of alcohol or illicit drugs. Other significant factors, in decreasing order in terms of their significance, include driving on a highway curve, exceeding speed limit, lighting conditions, the age of the driver, and the age of the vehicle. In contrast, there were six factors that were found to be significant in only some years and not in all years. These six temporally unstable factors include the use of seatbelt, driver's gender, rural highways, undivided highways, the type of the light-duty vehicle, and weather and road surface conditions. These same factors were found by other previous research studies to be significant and stable predictors of drivers' injury severity in single-vehicle collisions.

关键词： Drivers' injury severity Single-vehicle collisions Ordinal regression models Mixed logit models Temporal stability