Advanced Materials Research Vols. 255-260

Abstract: Optimizing investment funding levels and combinations of treatment types and timings, as an aid to management decision making, are vital functions of any bridge management system (BMS). Bridge management is always involved the bridge performance assessment which is essentially a multiple criteria decision making (MCDM) problem, which involves multiple assessment criteria such as traffic safety enhancement, preservation of bridge condition, protection from extreme events, agency cost minimization and user cost minimization. In this paper, a multi-criteria optimization methodology was developed not only to take due cognizance of costs but also to include a wide range of performance criteria to facilitate balanced decision-support practices in bridge management. The proposed methodology uses the AHP to determine the weights of criteria, linguistic terms to assess bridge performance under each criterion and aggregate bridge performance under different criteria into an overall performance score for each bridge structure. A numerical example illustrated the integrated methodology and the optimization process.

Abstract: To take full advantage of urban rail transit (URT), it needs the cooperation of bus from capacity, station spacing, network, and hub. The compute method to match transport capacity was brought forward. In addition, based on minimal traveling time, the optimum station spacing between bus and URT was determined. And the guiding principles are formulated for the restructuring and optimization of the networking system for public buses and URT. Finally, hubs between URT and bus were classed three sub-grades, and their layout was planned, and the design method of transfer channels method was proposed.

Abstract: Investigation at scene is the key issue to Scene Traffic Accident Reconstruction(TAR). Although the photogrammetry technique is widely applied in China due to its convenience and lower cost, it can only provide the final state of the traffic accidents. In this paper, a novel method based on the time difference of arrival (TDOA) technique was proposed to monitor the location of the vehicles passing the accident-prone section on the highway. The methodology of application of TDOA to the Traffic accident scene investigation was proposed, and the arrangement of sensors on the accident-prone sections of the selected freeway is discussed. Based on the coordinates collected by TDOA receivers, real-time position of the each vehicle moving on the accident-prone section could be extracted respectively and when the accidents happen, the traces of the vehicles involved would be obtained. It could be concluded that this method is important supplement to photogrammetry technique during accident scene investigation and could make the forensic judgment of accident responsibility more accurate.

Abstract: Introduction and innovation of PPP mode can attract more private capital to involve urban rail transit construction and enhance overall operating efficiency of URT. Based on analyzing the characters of URT PPP, through summarizing the PPP categories in application, this paper classifies the URT PPP practical approaches into four broad strategies, and provides a framework and some suggestions for assessing and managing risks associated with various URT PPP strategies.

Abstract: To solve the vibration problem caused by viaduct, first we summarize the theory about transmit of vibration systemic, then based on the theory of finite element, simulate and analyze the transmit rules of vibration. Furthermore, we analysis the character of vibration in the architecture which on surrounding environment; Then do a research to the residents who are live around the viaduct. Finally we use all the information to analysis the influence which bring by the railway traffic and give some useful advices.

Abstract: Based on the tunnel environment and the characteristic of flammability and explosion of liquefied petroleum gas (LGP), the leak of LPG tanker can induce heavy casualties and property loss in the tunnel. In order to study quantitative risk of LGP transportation in road tunnel, the data of 599 accidents and 659 accidental vehicles are collected. From these data, the proportion of LGP tanker accident in the total accident vehicles and million vehicles kilometer (MVK) tanker accident rates are obtained. By analyzing the leakage scene of LGP tanker, the possible accident types of the LGP transportation were analyzed, such as boiling liquid expanding vapor explosion (BLEVE), vapor cloud explosion (VCE), flash fire and jet fire, etc. The impact of leak time to various ranges of injury is studied in the condition of LGP continued leakage. The slight injury, serious injury and death radius of LGP leakage accidents are calculated in tanker loaded with different LGP quantity. In view of the accidental analysis, the countermeasures will be proposed to reduce the risk of LGP transportation in road tunnel.

Abstract: It is the key factor that the barge adjustment of large-scale structures’ ro-ro ship when the structure moves onto the barge. Generally, the common method on-site shipment is manual measurement which is a waste of time and labor power, at the same time, Barge adjustment is inaccurate and can not fundamentally solve the problem of the stability and real-time adjustment of the barge. In this paper, these questions are discussed based on the auto barge adjustment centralized in the computer, sensor and other technologies. In the process of ro-ro ship, the automatic computer control has been analyzed which makes the barge adjustment more timely, accurate and ensures real-time stability and accuracy of barge adjustment. Depending on the specific project case, it proves the feasibility and effectiveness of this method.

Abstract: The Panama Canal Authority has special requirements on “Size and Draught Limitation of vessels” when a vessel transit through the Panama Canal. This paper based on requirements from the Panama Canal Authority and characteristics of the Panamax vessel, represents a pre-arranged trim method on making optimum cargo plan so as to fully utilize the Panamax vessel’s carrying capacity and ensure smooth transit through the Panama Canal, it has been proved efficient and reliable.

Abstract: Urban Rail Transit is an important method of reliving traffic congestion problems of large and medium-sized cities and at the same time brings an increase in real estate price. Based on the relative researches from overseas and China, this paper, taking residential price around the first-stage stations of Zhengzhou Metro Line 1 as the example, by qualitative analysis and quantitative analysis, reveals the different impacting regulations of the Zhengzhou Urban Rail Transit to the residential price along the route. Finally, this paper assesses the price increase of the buildings and obtains the quantitative data, which will be helpful reference to persons of Urban Rail Transit and the real estate business.

Abstract: Continuous Highway design can ensure driver to travel at speeds which they expect along the highway alignment Evaluation of alignment continuity based on possible speed can ensure quality of alignment design and traffic accidents down. This paper counts alignment characteristics of prairie highway by field investigation and verification of relevant information. The actual driving test experimental results on typical prairie highway sections show that: prairie highway alignment continuity is good.