2019 Vol. 19, No. 3

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Dynamic characteristics of gravel soil low embankment in Xinjiang
YANG Xiao-hua, WAN Qi, LIU Da-peng, BAO Han
Abstract: Based on the Sanchakou-Shache Expressway in Xinjiang, the subgrade model test with 1∶1 ratio was carried out within the influence range of one wheel for the standard axle load, and the dynamic characteristics of low embankment were studied under vehicle load. The different moisture content states of...
2019, 19(3): 1-9. doi: 10.19818/j.cnki.1671-1637.2019.03.001
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Deformation properties of remolded loess under cyclic loading
WENG Xiao-lin, LI Hao, SHANG Xu-wen, JIA Yang, ZHOU Shang-qi, HU Ji-bo
Abstract: To study the effect of coupling changes in principal stress direction and magnitude on the stress-strain state and non-coaxiality of soil, a series of cyclic torsional shear tests were carried out on the saturated remolded loess by using a hollow cylindrical torsional shear apparatus, and the variat...
2019, 19(3): 10-18. doi: 10.19818/j.cnki.1671-1637.2019.03.002
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Influence of foam condition on foam expansion rate of base asphalt
HAN Yue-jie, DING Zhi-yong, WU You, LI Jun
Abstract: A 3 D modeling of asphalt generator was carried out by the modeling software Solidworks. The finite element simulation software Fluent was used to simulate the base asphalt foaming processes under different parameters, and the results from the experiment and the simulation were compared. The reliabi...
2019, 19(3): 19-26. doi: 10.19818/j.cnki.1671-1637.2019.03.003
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Test method of clip bite force
ZHANG Feng, LIU Jia-qi, GAO Lei, LIU Guan-zhi
Abstract: To study the relationship between the mutation segment of tension test curve and the clip bite force when using the lift-off method to test the force of prestressed steel strand, the high-frequency acquisition technique in the resistive pressure sensor was used to test the prestressed steel strand f...
2019, 19(3): 27-35. doi: 10.19818/j.cnki.1671-1637.2019.03.004
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Long-term push out test and finite element analysis of steel-concrete composite specimens
SONG Rui-nian, ZHAN Yu-lin, LIU Fang, ZHAO Ren-da
Abstract: The long-term interface slip and strain development process for steel-concrete composite specimens with different shear connectors were investigated through the push out test and finite element method. Referring to the standard specimen of push out test in the Eurocode 4, two sets of specimens were ...
2019, 19(3): 36-45. doi: 10.19818/j.cnki.1671-1637.2019.03.005
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Field simulation test of bridge pile foundation damage in high altitude and strong salt marsh area
FENG Zhong-ju, HU Hai-bo, WANG Fu-chun, XU Zhan-hui, YAO Xian-hua, LIU Ning
Abstract: In order to explore the damage status of highway bridge pile foundation subjected to dry-wet cycle and freeze-thaw cycle in high altitude and strong salt marsh area, the effects of pile body positions, concrete mix proportions, concrete admixtures and external protective measures on the mechanical p...
2019, 19(3): 46-57. doi: 10.19818/j.cnki.1671-1637.2019.03.006
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Distribution characteristics of grouting reinforcement ring for tunnel with heterogeneous weak surrounding rock
ZHANG Cong, YANG Jun-sheng, XIE Yi-peng, DAI Yong, LIANG Xiong, GONG Fang-hao
Abstract: Based on the random distribution theory and fluid-solid coupling theory, the dynamic changes of physical parameters of surrounding rock and the time-varying viscosity of grouts in the grouting process were considered, a grout diffusion equation of a tunnel with heterogeneous weak surrounding rock un...
2019, 19(3): 58-70. doi: 10.19818/j.cnki.1671-1637.2019.03.007
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Effects of post-pouring belt void of base slab on track structure and train operation of CRTSⅡ slab track
YANG Rong-shan, WANG Jie, JIANG Heng-chang, CHEN Shuai, DU Jin-xin
Abstract: Under the uninterrupted train running condition, the post-pouring belt of CRTSⅡ slab track base slab on the bridge was repaired by using the ultra-high pressure water jet method. The statics calculation model of CRTSⅡ slab track structure was established, and the effects of post-pouring belt with di...
2019, 19(3): 71-78. doi: 10.19818/j.cnki.1671-1637.2019.03.008
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Torsional coupled vibration characteristics of multi-stage blade disc-shaft system of aeroengine
XU Zi-li, ZHOU Zi-xuan
Abstract: Aiming at the multi-stage blade disc rotor structure, the coupling effect of multi-stage blade bending deformation and shaft torsional deformation was taken into account, the centrifugal rigidity of blade was lead in, and the coupling vibration model containing multi-stage blades, two-stage blade di...
2019, 19(3): 79-88. doi: 10.19818/j.cnki.1671-1637.2019.03.009
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Rapid analysis method of weight-reduced orifice plate structure based on stiffness equivalence model
NEI Jing-xin, REN Jun-ming, TAN Wei, CHEN Li-jun
Abstract: In order to calculate and analyze the structure of weight-reduced orifice plate more efficiently, a rapid analysis method was proposed. The general stiffness equivalence relationship between weight-reduced orifice plate structure model and planar plate structure model was researched. The relational ...
2019, 19(3): 89-99. doi: 10.19818/j.cnki.1671-1637.2019.03.010
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Fatigue performance and life assessment of railway axle with inside axle box
LIU Yu-xuan, WU Sheng-chuan, LI Cun-hai, KANG Guo-zheng, LIANG Shu-lin
Abstract: Low cycle fatigue test, high cycle fatigue test under rotating bending and crack growth rate test of EA4 T alloy steel were carried out. Considering load type, surface quality, dimension coefficient and other factors, the fatigue limit of standard small specimen was modified to predict the fatigue p...
2019, 19(3): 100-108. doi: 10.19818/j.cnki.1671-1637.2019.03.011
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Impact of air flow characteristics underneath carbody on snow accumulation in bogie region of high-speed train
CAI Lu, ZHANG Ji-ye, LI Tian, AN Chao
Abstract: Aiming at the problem of snow accumulation around the bogie region of high-speed train, the aerodynamics model of the train including refined bogie was established. The detached-eddy simulation was used to simulate the air flow field around the high-speed train at the running speed of 350 km·h-1. Th...
2019, 19(3): 109-121. doi: 10.19818/j.cnki.1671-1637.2019.03.012
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Macroscopic traffic flow model of expressway on-ramp bottlenecks
SUN Jian, YIN Ju-yuan, LI Tao-ning
Abstract: Based on on-ramp merging mode and fundamental diagram form, an adjusted cell transmission model (CTM) was proposed. On-ramp state variables were introduced to track the traffic state of on-ramps, and new on-ramp merging rules were defined.The dual capacity fundamental diagram was introduced to the a...
2019, 19(3): 122-133. doi: 10.19818/j.cnki.1671-1637.2019.03.013
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Comprehensive coordination quantitative analysis of urban rail transit planning network and urban planning
PENG Qi-yuan, LIU Jie
Abstract: The comprehensive coordination between urban rail transit planning network and urban planning in multi-radii and multi-directions was analyzed based on the fractal theory, the sector dimensions of urban rail transit planning network and urban road planning network based on network equivalent length ...
2019, 19(3): 134-144. doi: 10.19818/j.cnki.1671-1637.2019.03.014
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Safety scheduling of hazardous materials transportation vehicle considering spatio-temporal dissimilarity
CHAI Huo, HE Rui-chun, DAI Cun-jie, MA Chang-xi
Abstract: To ensure a safety distance between the hazardous materials transportation vehicles, the travel routes and departure time intervals of hazardous materials transportation vehicles were optimized in term of space-time. The impact of hazardous material transportation vehicle accident on other vehicles ...
2019, 19(3): 145-156. doi: 10.19818/j.cnki.1671-1637.2019.03.015
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Scheduling optimization of tramp shipping based on temporal and spatial attributes of shipping demand
JIANG Zhen-feng, CHEN Dong-xu, YANG Zhong-zhen, LIU Yi-ming
Abstract: The shippers' choice behaviors and the temporal and spatial distribution characteristics of shipping demand were considered, the carrier's ship operation period was divided into multiple continuous time windows, the selection inertia of the shipper was transformed into the potential market shares of...
2019, 19(3): 157-165. doi: 10.19818/j.cnki.1671-1637.2019.03.016
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Spatial evolution of coal transportation network of China
WANG Wen-ya, LI Zhen-fu
Abstract: To investigate the evolution rules and intrinsic mechanisms of coal transportation network of China, a coal transportation network evolution model based on the coal price cost and transportation cost selection mechanism was proposed referring to the modeling ideas of complex networks. Through adjust...
2019, 19(3): 166-177. doi: 10.19818/j.cnki.1671-1637.2019.03.017
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Heterogeneous vehicular network selection method considering network congestion and system fairness
LI Xiao-chi, XU Zhi-gang, CHEN Ting, ZHAO Xiang-mo
Abstract: The bounded rationality characteristic of evolutionary game was used to implement the network selection, and the network resource of heterogeneous vehicular network system was evenly distributed. The fairness of the system was guaranteed by optimizing evolutionary game with two-layer game while some...
2019, 19(3): 178-190. doi: 10.19818/j.cnki.1671-1637.2019.03.018
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