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For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Experimental Study on Flexural Behavior of Finger-Jointed Timber Beams Strengthened with CFRP Sheets WANG Jianxing, JIA Yumeng, XUE Meihui Journal of Jishou University(Natural Sciences Edition)    2023, 44 (3): 39-45.   DOI: 10.13438/j.cnki.jdzk.2023.03.006 Abstract （206）      PDF（pc） （2171KB）（117）       Knowledge map    Save In order to improve the flexural strength of finger-jointed timber beams,three groups of timber beams were designed and manufactured.Through four-point compression test,the flexural performance of solid timber beams,finger-jointed timber beams and CFRP reinforced finger-joint beams were compared,and the influence of finger-jointed joints on the fracture mode of timber beams was analyzed.The displacement load curve of finger-jointed timber beams and the displacement load curve of finger-jointed timber beams were obtained,and the corresponding distinction was given for the failure characteristics of each type.Therefore,the feasibility of using CFRP to reinforce finger-joint is proposed.The test results show that the appearance of finger-joint has obvious influence on the bending failure process of timber.The appearance of finger-joint makes the fracture mode of timber change from ductile fracture to brittle fracture,and the flexural strength of finger-joint timber beam is significantly improved by using CFRP cloth reinforcement. Reference | Related Articles | Metrics | Comments（0） Select Effect of Pier Height on Mechanical Properties of Asymmetric High Pier Continuous Rigid Frame Bridges LI Jiawen, NING Ruo'an, WANG Jianxing Journal of Jishou University(Natural Sciences Edition)    2023, 44 (1): 44-52.   Abstract （180）      PDF（pc） （5145KB）（48）       Knowledge map    Save The mechanical characteristics of asymmetric high pier continuous rigid frame bridges with different pier heights were studied to obtain the internal force and displacement deformation characteristics of the main girders and piers of high pier continuous rigid frame bridges with different pier heights.The vertical displacement of the main girder increases with the increase of pier height,with an average increase of 14.3% at the maximum displacement,and the shear force of the main girder at the top of the pier decreases with the increase of pier height,with an average change of rate of 37.1%. Reference | Related Articles | Metrics | Comments（0） Select Bearing Capacity of Carbon Fiber Plate Reinforced Bridge WANG Jianxing, CHEN Yiming, ZHANG Pengyu, LU Fan, WEI Guifeng, WEI Dongping, SONG Dexin Journal of Jishou University(Natural Sciences Edition)    2023, 44 (1): 53-58.   DOI: 10.13438/j.cnki.jdzk.2023.01.008 Abstract （327）      PDF（pc） （950KB）（68）       Knowledge map    Save In order to explore the influence of carbon fiber plate on the bearing capacity of the bridge,the model of Dongtiaoxi Bridge was established by Midas Civil software,and the sinking deformation,shear bearing capacity and torsional bearing capacity of each bridge section were calculated and analyzed,and the shear failure area was delineated.With addition of carbon fiber plate in the vulnerable area,the numerical analysis of the original bridge and the bridge reinforced by carbon fiber plate is carried out.It is found that the bridge body strengthened with the carbon fiber plate has a significant improvement in bearing performance,in which the settlement amplitude is reduced by 27%,and the shear torsion resistance is increased by 10%. Reference | Related Articles | Metrics | Comments（0） Select Safety Impact of Blasting Construction in Xiazhuang Copper Mine on Adjacent Binghanhe Tunnel CUI Guangyao, TIAN Yuhang, WANG Mingsheng Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 51-57.   DOI: 10.13438/j.cnki.jdzk.2022.04.010 Abstract （430）      PDF（pc） （7135KB）（85）       Knowledge map    Save Through FLAC3D calculation software,the displacement,stress and safety factor of adjacent tunnel lining and rail during construction blasting in Xiazhuang copper mine are analyzed.The results show that after the blasting construction,the maximum horizontal displacement of the lining is 4.07 mm,the maximum horizontal convergence is 0.08 mm,the maximum settlement is 4.23 mm,the maximum lateral displacement of the rail is 3.46 mm,and the maximum settlement is 3.48 mm,which all meet the displacement control standard.The maximum principal stress,minimum principal stress and maximum shear stress of lining and rail increase slightly.The minimum safety factor of lining is 4.49,and the safety factor of lining after blasting construction meets the specification requirements. Reference | Related Articles | Metrics | Comments（0） Select Mechanical Properties of Stress Corroded Steel Wire with Cracks WANG Xin, DU Siyu, GAO Yang Journal of Jishou University(Natural Sciences Edition)    2022, 43 (4): 58-66.   DOI: 10.13438/j.cnki.jdzk.2022.04.011 Abstract （393）      PDF（pc） （12742KB）（73）       Knowledge map    Save In order to study the tensile mechanical properties of stress corroded high strength galvanized steel wire with cracks,the mechanical model of high strength steel wire with cracks was established based on the data of stress corrosion test,static tensile test,electron microscope test and finite element simulation.The results show that in the static tensile test,the critical failure factor of the steel wire is the crack,and the stress concentration factor of the notch is much higher than that of the corrosion pit.The mechanical property change is caused by further corrosion of the initial crack.When corrosion  is serious,the mechanical properties is mainly determined by the crack and the corrosion pit. Reference | Related Articles | Metrics | Comments（0） Select Study on Initial Stiffness of Top-Seat Angle Connections Based on the Analysis of Abqaus WU Tao,BAI Ye,KONG Zhengyi Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2017.06.011 Select Seismic Behavior of Pseudo-Classic Architecture with Three-Storey Attic Structure WANG Jianxing，XUE Meihui，WANG Zongze Journal of Jishou University（Natural Sciences Edition)    DOI: 10.3969/j.cnki.jdxb.2017.04.018