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Published in last 1 year |  In last 2 years |  In last 3 years |  All Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Seismic Performance Analysis of Multi-Span Curved Continuous Girder Bridges Based on Friction Pendulum Spherical Bearings LI Yue, NING Zhe, YAN Yong, SHAN Honglan, LUO Anran Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 45-55.   DOI: 10.13438/j.cnki.jdzk.2024.02.007 Abstract （12）      PDF（pc） （1968KB）（32）       Knowledge map    Save To study the seismic performance and vibration isolation method of multi-span curved continuous girder bridge,a finite element model is established for the multi-span curved continuous girder bridge with friction pendulum spherical bearings,and the dynamic characteristics and nonlinear time analysis is carried out.Results show that the longitudinal stiffness of the bridge model is weaker than the transverse stiffness,and the first-order vibration mode contributes more to the longitudinal seismic response of the bridge pier,and the vibration mode participation coefficient is 29.8%;the sixth-order vibration mode contributes more to the transverse seismic response of the bridge pier,and the vibration mode participation coefficient is 20%;under the E1 earthquake,the friction pendulum spherical bearing can keep the bridge in elastic working condition,and the bearing deformation and expansion joint width meet the requirements,which proves the effectiveness of the selected and arranged friction pendulum spherical bearing;under the E2 earthquake,the maximum bending moment demand of the section of some piers is greater than the bending capacity of the section,but further strength tests were carried out on the piers,and they all meet the seismic demand. Reference | Related Articles | Metrics | Comments（0） Select Huajiang Dry-Hot Valley in Central Guizhou Province:Crrent Knowledge and Prespectives JIA Xinglian, WEI Changsheng, YU Yanghua Journal of Jishou University(Natural Sciences Edition)    2024, 45 (2): 56-62.   DOI: 10.13438/j.cnki.jdzk.2024.02.008 Abstract （16）      PDF（pc） （7279KB）（41）       Knowledge map    Save Situated in central Guizhou Province,China,the Huajiang karst dry-hot valley exhibits a distinctive degree of karst desertification and possesses a relatively fragile habitat.This area's natural environment,ecological industries,and socio-economic factors have drawn considerable scholarly attention.Over the course of nearly 30 years,since the initiation of the "Ninth Five-Year Plan",significant research has been conducted within this region.This research has focused on understanding and controlling karst desertification,enhancing the quality and efficiency of ecological industries,and fostering the coupled development of ecology and economy.Such endeavours have yielded essential theoretical and practical results,aiding in the management of karst desertification and the ecological construction of mountainous regions.This paper delineates the area's fundamental characteristics from four aspects:aridity,high temperatures,valleys,and karst desertification,thereby enriching our understanding of the current habitat situation.Following this,we review the key literature concerning the understanding of karstification and control,cultivation of ecological industries,and improvement in quality and efficiency of these industries from a holistic perspective.Moreover,we utilise long-term cumulative data to analyse areas meriting further investigation.Lastly,based on a regional scale,we suggest future research prospects in three dimensions:quantification and application of micro-habitat characteristics,the interrelationship between vegetation restoration and dual structures,and realisation of the ecological value of ecological products. Reference | Related Articles | Metrics | Comments（0）