The evaluation of construction safety risks has become a crucial task with the increasing development of bridge construction.This paper aims to provide an overview of the application of backpropagation neural networks...The evaluation of construction safety risks has become a crucial task with the increasing development of bridge construction.This paper aims to provide an overview of the application of backpropagation neural networks in assessing safety risks during bridge construction.It introduces the situation,principles,methods,and advantages,as well as the current status and future development directions of backpropagation-related research.展开更多
At the turn of this century, China began the largest road and bridge development in the world, which has virtuously interacted with the social and economic development and has elevated the engineering technology to wo...At the turn of this century, China began the largest road and bridge development in the world, which has virtuously interacted with the social and economic development and has elevated the engineering technology to world-class level. Surveying the development of world transportation, and comparing the road and bridge construction efforts of Europe, U.S.A, Japan and China, general experiences of success can be derived as follows: It is greatly beneficial to give priority to transportation for economic development; it takes national strategy and social action to build up a transportation network; demand and innovation are the driving forces to upgrade road and bridge technology; management innovation and quality assurance can greatly improve development caliber. While rationally acknowledging China’s transportation infrastructure achievements, we should reflect on issues with Chinese characteristics that have affected quality and efficiency, expose all construction practices that violate scientific law, overall management defects in road and bridge construction and maintenance, and search for new ways to strengthen social management and the creation of a healthy soft environment.展开更多
Traditional bridge monitoring systems often require wired connections between sensors,a data acquisition system,and data center.The use of extension wires,conduits,and other costly accessories can dramatically increas...Traditional bridge monitoring systems often require wired connections between sensors,a data acquisition system,and data center.The use of extension wires,conduits,and other costly accessories can dramatically increase the total cost of bridge monitoring.With the development of wireless technologies and the notable cost benefits,many researchers have been integrating wireless networks into bridge monitoring system.In this study,a wireless bridge monitoring system has been developed based on the Sub-1 GHz network.The main functional components of this system include sensors,wireless nodes,gateway and data center.Wireless nodes can convert analog signals obtained from the sensors to digital signals,then transmit the collected data to the gateway using the Sub1 GHz network.The gateway receives and sorts data from different wireless nodes and then forwards these data to the data center wirelessly.All collected data are processed in the data center using the data processing software developed in this study.In order to validate the performance of the wireless system developed in this study,a steel girder bridge was monitored in the field during the concrete deck construction.The field results were also compared with the theoretical values obtained from finite element models to ensure the accuracy and reliability of the wireless system.The results indicate that the wireless bridge monitoring system developed in this study is effective and affordable.The Sub-1 GHz network can be a better solution for bridges with complicated site conditions because of the extended data transmission distance.Although the power consumption can be controlled by using low-power consumption components,including the power control in software design can also dramatically reduce the system’s power consumption.展开更多
基金Key natural science research project of Anhui Province in 2023 research on risk assessment of bridge engineering project based on BP neural network(2023AH052746)。
文摘The evaluation of construction safety risks has become a crucial task with the increasing development of bridge construction.This paper aims to provide an overview of the application of backpropagation neural networks in assessing safety risks during bridge construction.It introduces the situation,principles,methods,and advantages,as well as the current status and future development directions of backpropagation-related research.
文摘At the turn of this century, China began the largest road and bridge development in the world, which has virtuously interacted with the social and economic development and has elevated the engineering technology to world-class level. Surveying the development of world transportation, and comparing the road and bridge construction efforts of Europe, U.S.A, Japan and China, general experiences of success can be derived as follows: It is greatly beneficial to give priority to transportation for economic development; it takes national strategy and social action to build up a transportation network; demand and innovation are the driving forces to upgrade road and bridge technology; management innovation and quality assurance can greatly improve development caliber. While rationally acknowledging China’s transportation infrastructure achievements, we should reflect on issues with Chinese characteristics that have affected quality and efficiency, expose all construction practices that violate scientific law, overall management defects in road and bridge construction and maintenance, and search for new ways to strengthen social management and the creation of a healthy soft environment.
文摘Traditional bridge monitoring systems often require wired connections between sensors,a data acquisition system,and data center.The use of extension wires,conduits,and other costly accessories can dramatically increase the total cost of bridge monitoring.With the development of wireless technologies and the notable cost benefits,many researchers have been integrating wireless networks into bridge monitoring system.In this study,a wireless bridge monitoring system has been developed based on the Sub-1 GHz network.The main functional components of this system include sensors,wireless nodes,gateway and data center.Wireless nodes can convert analog signals obtained from the sensors to digital signals,then transmit the collected data to the gateway using the Sub1 GHz network.The gateway receives and sorts data from different wireless nodes and then forwards these data to the data center wirelessly.All collected data are processed in the data center using the data processing software developed in this study.In order to validate the performance of the wireless system developed in this study,a steel girder bridge was monitored in the field during the concrete deck construction.The field results were also compared with the theoretical values obtained from finite element models to ensure the accuracy and reliability of the wireless system.The results indicate that the wireless bridge monitoring system developed in this study is effective and affordable.The Sub-1 GHz network can be a better solution for bridges with complicated site conditions because of the extended data transmission distance.Although the power consumption can be controlled by using low-power consumption components,including the power control in software design can also dramatically reduce the system’s power consumption.
