With the continuous deepening of urbanization,the focus of urban construction has shifted to internal renewal,and the phenomenon of decreased vitality caused by the spatial limitations of pedestrian bridges with a sin...With the continuous deepening of urbanization,the focus of urban construction has shifted to internal renewal,and the phenomenon of decreased vitality caused by the spatial limitations of pedestrian bridges with a single transportation function as the main focus has gradually emerged.Based on this,environmental behavior theory is used to seek the convergence point between the material space and behavioral activities of pedestrian bridges to solve this dilemma.In this paper,the pedestrian bridge of Southwest Hospital of Army Medical University is taken as an example.Starting from the three types of spaces of pedestrian bridges,through behavior observation,interview research,and data analysis,the correlation between the material space of pedestrian bridges and the behavioral characteristics of the population is analyzed,stimulating the spatial vitality of pedestrian bridges,and providing reference for the sustainable development,construction,and renovation of pedestrian bridges.展开更多
Aiming at the problem of pedestrian bridge vibration measurement,a vibration measurement system of pedestrian bridge with dual magnetic suspension vibrator structure was designed according to absolute vibration measur...Aiming at the problem of pedestrian bridge vibration measurement,a vibration measurement system of pedestrian bridge with dual magnetic suspension vibrator structure was designed according to absolute vibration measurement principle. The relationship between the magnetic repulsion force of vibrator and its displacement was obtained by the experimental method and the least square fitting method. The vibration equations of two magnetic suspension vibrators were deduced respectively,and the measurement sensitivity of the system was deduced. The amplitude-frequency characteristic of the system was studied. A simulation model of vibrator measurement system with double magnetic suspension vibrator was established. The analysis shows that the sensitivity of the vibration measurement system with double magnetic suspension vibrator is higher than that with single magnetic suspension vibrator. The four vibration waveforms were measured,that is,no one passes through a pedestrian bridge,there are cars running under the pedestrian bridge,single pedestrian passes through the pedestrian bridge and multiple pedestrians pass through the pedestrian bridge. The multi-scale one-dimensional wavelet decomposition function was used to analyze the vibration signals. The vibration characteristics were obtained using one dimension wavelet decomposition function under four different conditions. Finally,the vibration waveforms of four cases were reconstructed. The measured results show that the vibration measurement system of pedestrian bridge with double magnetic suspension vibrator structure has high measurement sensitivity. The design has a certain value to monitor a pedestrian bridge.展开更多
基金Sponsored by the Research on the Path and Key Technology Application of Creating a Green and Low-carbon Living Environment in the Chongqing East Station Area(cqjt-2022-253)Graduate Research Innovation Project of School of Architecture and Urban Planning,Chongqing Jiaotong University(JGXY202202)。
文摘With the continuous deepening of urbanization,the focus of urban construction has shifted to internal renewal,and the phenomenon of decreased vitality caused by the spatial limitations of pedestrian bridges with a single transportation function as the main focus has gradually emerged.Based on this,environmental behavior theory is used to seek the convergence point between the material space and behavioral activities of pedestrian bridges to solve this dilemma.In this paper,the pedestrian bridge of Southwest Hospital of Army Medical University is taken as an example.Starting from the three types of spaces of pedestrian bridges,through behavior observation,interview research,and data analysis,the correlation between the material space of pedestrian bridges and the behavioral characteristics of the population is analyzed,stimulating the spatial vitality of pedestrian bridges,and providing reference for the sustainable development,construction,and renovation of pedestrian bridges.
基金supported by the Chinese National Natural Science Foundation under Grant (51377037)
文摘Aiming at the problem of pedestrian bridge vibration measurement,a vibration measurement system of pedestrian bridge with dual magnetic suspension vibrator structure was designed according to absolute vibration measurement principle. The relationship between the magnetic repulsion force of vibrator and its displacement was obtained by the experimental method and the least square fitting method. The vibration equations of two magnetic suspension vibrators were deduced respectively,and the measurement sensitivity of the system was deduced. The amplitude-frequency characteristic of the system was studied. A simulation model of vibrator measurement system with double magnetic suspension vibrator was established. The analysis shows that the sensitivity of the vibration measurement system with double magnetic suspension vibrator is higher than that with single magnetic suspension vibrator. The four vibration waveforms were measured,that is,no one passes through a pedestrian bridge,there are cars running under the pedestrian bridge,single pedestrian passes through the pedestrian bridge and multiple pedestrians pass through the pedestrian bridge. The multi-scale one-dimensional wavelet decomposition function was used to analyze the vibration signals. The vibration characteristics were obtained using one dimension wavelet decomposition function under four different conditions. Finally,the vibration waveforms of four cases were reconstructed. The measured results show that the vibration measurement system of pedestrian bridge with double magnetic suspension vibrator structure has high measurement sensitivity. The design has a certain value to monitor a pedestrian bridge.
