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Administrated by The Education Department of Jilin Province
Sponsored by Jilin Jianzhu University
Editor-in-Chief: CHEN Lei
Edited and Published by Editorial Department of Journal of
Jilin Jianzhu University
Address: 5088 Xincheng Street, Changchun, China
Postcode: 130118
ISSN 2095-8919
CN 22-1413/TU
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E-mail: jljzdxxb@jlju.edu.cn
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Numerical analysis of coupled response of high-piled wharf structure-foundation under wave action
LI Zihang;TIAN Yuhang;SUN Liqiang;LANG Ruiqing;CHENG Xinglei;With the service life of the wharf increasing from 50 to 100 years, the long-term safety assessment has become a technical challenge in current design. The coupling response characteristics of pile-foundations under complex marine environments have become a hot topic. To address this issue, this paper adopts numerical analysis methods to conduct research on the coupling response laws and evolution of pile-foundations under wave load. An elastoplastic constitutive model considering the correlation between cumulative plastic strain and cycle number is used to simulate the strain softening problem under cyclic loading. A three-dimensional finite element calculation model is established to analyze the displacement response, the pile-soil interaction, and the internal force response of the pile under cyclic wave loading. The results show that the pile embedment ratio significantly affects the displacement characteristics of the pile body, the disturbance degree of the soil around the pile, and the distribution characteristics of the internal force of the pile. The fruit can provide a basis for the safety assessment of high-pile wharf structures under long-term service.
Research on the reasonable pile spacing of NT-CEP pile groups under vertical pressure based on stress analysis
YANG Yang;QIAN Yongmei;WANG Ziyu;ZHANG Yingtao;GUAN Ming;The new type concrete expanded-plate pile(hereinafter referred to as NT-CEP pile), as a variable cross-section pile, has been increasingly applied in the engineering field. Compared with traditional straight-hole piles, it has the advantages of high bearing capacity, small settlement, and flexible design of the bearing plate. The ANSYS software is used to analyze the stress of the pile body and the soil around the NT-CEP pile group. Without considering the constraint of the upper bearing platform on the pile top, this paper studies the variation laws of the pile body stress and the soil stress around the pile when the compression-resistant NT-CEP pile group reaches failure, reveals the failure mechanism of the NT-CEP pile group under vertical pressure, and then determines the reasonable net spacing of the plate ends(hereinafter referred to as the pile spacing). The research shows that the bearing capacity of the NT-CEP pile group under vertical pressure increases with the increase of the pile spacing, but it does not increase linearly. When the pile spacing exceeds 4 times the overhang radius of the plate, the efficiency of the bearing capacity improvement begins to decrease. Therefore, it is more reasonable to control the pile spacing within 3 to 4 times the overhang radius of the plate in engineering design. Improving the theoretical system of the NT-CEP pile group under vertical load provides important technical support for its design, application, and technical promotion.
Risk assessment of debris flow based on grey correlation method in the lower reaches of Buerkuotai River in Emin County, Xinjiang
WANG Yongsheng;MAO Chengwen;ZHANG Wen;ZHANG Han;A number of valley-type debris flow gullies have developed along the lower reaches of the Buerkuotai River in Emin County, Xinjiang. However, due to the region's semiarid climate and limited human activity, data scarcity and weak debris flow development pose challenges to risk evaluation. In particular, conventional 2D remote sensing methods are insufficient for accurately identifying source materials in complex terrains. Through field investigation, satellite image interpretation, and unmanned aerial vehicle(UAV) oblique photography the fine geological information of 16 debris flow gullies(Z01～Z09 and Y01～Y07)in the study area was obtained. Combined with the high-precision 3D real-lifemodel constructed by UAV, the classification of provenance types and reservesestimation were carried out, and 15 debris flow indicators were selected to assess susceptibility levels, and ten risk assessment factors(including two primary and eight secondary factors) were used in a grey correlation-based evaluation model. Results indicate that 14 gullies are moderately susceptible and two are mildly susceptible, with all classified as mildly dangerous overall. This study proposes an innovative methodology that combines UAV-based 3D modeling and grey correlation analysis, offering a novel approach for rapid debris flow assessment in semiarid mountainous regions.
Study on the effect of polypropylene fibers on the mechanical properties of pervious concrete
ZHANG Yongsheng;YU Genhai;ZHANG Shengyang;WANG Weihua;SHAN Jingsong;LIU Jian;To investigate the influence of fibers on the performance of pervious concrete, permeable concrete was prepared using cement as the base material, basalt as aggregate, and coarse/fine polypropylene fibers as reinforcement. Through measurements of water permeability coefficient, compressive strength, and flexural strength, the effects of single and mixed fiber(coarse/fine fibers) on both permeability and mechanical properties were analyzed to determine optimal fiber parameters. Results demonstrate that: coarse and fine fibers with lengths of 25 mm and 6 mm respectively exerted the most significant influence on water permeability coefficient; coarse fibers achieved the highest enhancement in compressive strength at optimal parameters(30 mm length, 4.5 kg/m3 content); mixed fiber produced the best improvement in flexural strength with optimal parameters(9 mm fine fibers combined with 25 mm coarse fibers at 5.0 kg/m3 total content with 1∶4 ratio); fiber parameters should be selected according to specific pavement requirements. Microscopic analysis revealed that fiber incorporation effectively suppressed crack initiation and unidirectional linear propagation, with coarse fibers exhibiting the most pronounced meso-level toughening effect. However, mixed fiber showed less significant toughening effects compared to single fiber.
Effect of phosphogypsum on the performance of reinforced truss-concrete slabs
SHA Lirong;XIA Yu;QIAN Ziqi;ZHANG Ao;HAN Yan;To investigate the differences in mechanical properties of concrete at different phosphogypsum contents, the static load tests including monotonous loading and repetitive loading tests were carried out on four reinforced truss-concrete slabs under the condition of simple support at one end and fixation at the other end, aiming to test the stress, strain, deflection curves, and crack distribution of specimens under the static load tests, as well as the deformation of the specimens and the development of cracks, and to conduct a horizontal comparative analysis with the experimental data. The feasibility and specific mechanical properties of phosphogypsum,can be seen that the performance of steel truss concrete slab with 2% phosphogypsum added is not significantly different from that of ordinary concrete slab, and can meet the usage standards; and the specimen is simulated by Abaqus finite element analysis under the same conditions as the test, and the simulation results were found to match the experimental phenomena well.
Research on Cloud Computing Based on Virtualization Technology
LI Gang-jian(School of Computer science and Engineering Jilin Institute of Architectural and Civil Engineering,Jilin,Changchun,China 130118)In the paper,the author did research on the current trend of cloud computing technology and the cloud computing model.According to its own characteristics,a way is presented based on Hyper-v.The platform has some advantages,so that the characteristics of virtualization will come into perform well.
The Development Status and Prospects of Diatomite
XIAO Li-guang,ZHAO Zhuang,YU Wan-zeng(School of Material Science and Engineering,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130021)Diatomaceous earth as a very abundant mineral resources,as its porosity,adsorption is strong,light,high melting point,thermal insulation,sound absorption,low refractive index,chemical stability and so on,it has a widely used in many fields.This paper describes the latest research and application of diatomite in fillers,filter aid,agriculture,construction materials and other areas.
Iron Tailings Comprehensive Utilization at Home and Abroad
XIAO Li-guang,YI Jing-hong,CUI Zheng-xu(School of Material Science and Engineering,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130118)The mineral resource is one of the human survival and development important material bases,along with mineral resource's massive developments and the use,the ore is day by day deficient,the tailings recycling has a second world attention.This article describes the tailings and the comprehensive use of the status quo,the application of the building materials,and the proposal in the future development of tailings.
Development of the Sludge Treatment Techniques
Wang Shiyuan (The Countryside Hygiene and Reform Water Office of Jilin Province)Cui Yubo, Wang Cuilan, Jian Zhiyuan (Department of Urban Construction)This paper simply introduced the sludge treatment techniques and its development, and presented the regulation of choosing and developing sludge treatment techniques.
Summary of Data Mining Methods
GUO Xiu-juan (Department of Computer Engineering,Jilin Architectural and Civil Engineering Institute,Changchun130021)The good methods and technologies of data mining may get excellent knowledge.This paper presents an overview on data mining methods.First,the concept of data mining is discussed.Then,this paper describes the theories and technologies on data mining,such as relational rules,decision tree,neural network,rough sets,clustering analysis,genetic algorithms,and statistics analysis.Finally,how to study data mining is forecasted.
Research Progress in Synthesis and Application of Quantum Dots
LI Hua-nan;FENG Wei;WANG Ting;Polyimide had many advantages,such as heat resistance,low temperature resistance,resistance to radiation,flame retardant,non-toxic characteristics,excellent mechanical properties,dimension stability,chemical stability and biocompatibility etc,had been widely used in aviation,aerospace,electrical,electronics,communications,buildings,cars,and other areas of the tip. In this paper,a review was given about the basic classification and main characteristics of polyimide as the core. It was summarized the polyimide synthesis method and modification of significance. Moreover,suggestions were expounded about the application progress of polyimide in many fields,and prospect the development trend of the future.
The Comparison of the French Versailles Palace and China Beijing Imperial Palace
YU Qi,MO Wei (School of Architecture and Planning,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130118)By comparing space layout,building systems,construction materials and structural,architectural decoration and color of different points for the French Versailles palace and the Beijing national palace museum in China,from macroscopical to microcosmic comparison of the two countries palace architecture,cultural of the similarities and differences between China and France is analyzed.Trying to find out the difference between eastern and western culture as the history of eastern and western architectural palaces outstanding representative of China's Beijing palace museum and the French Versailles palace,has long been regarded as the world two great cultural windows.Different cultures on the "beauty" of the pursuit are not the same.Therefore,we compared from an aesthetic point of view these two in the history of human civilization occupy a considerable proportion of the palace construction.To arouse people on architectural aesthetics thinking and a new understanding are done.
Black Humor in George Orwell’s Animal Farm
ZHAO Yu-hong(School of Foreign Language,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130021)Black humor skill is applied by George Orwell in his masterpiece Animal Farm to represent an inhumane society.The skill of irony,the implication of the characters,and fallacy will be analyzed in this article.
The Development Status and Prospects of Diatomite
XIAO Li-guang,ZHAO Zhuang,YU Wan-zeng(School of Material Science and Engineering,Jilin Institute of Architecture and Civil Engineering,Changchun,China 130021)Diatomaceous earth as a very abundant mineral resources,as its porosity,adsorption is strong,light,high melting point,thermal insulation,sound absorption,low refractive index,chemical stability and so on,it has a widely used in many fields.This paper describes the latest research and application of diatomite in fillers,filter aid,agriculture,construction materials and other areas.
The Cause of Global Warming
WANG Hong-jie,SONG Xiao-dong,WANG En-shi(Jilin Institute of Architecture and Civil Engineering ,Changchun ,China 130021;In the early 1930s ,the distinguished Yugoslavian climatologist Milankovich had already developed the theory that a tiny ? uctuation in the eccentricity ratio of Earth's orbit ,or the obliquity of Earth's spin axis ,even in the position of the first point of Aries may render a direct in? uence on the solar radiation's range and degree;therefore ,causes the climate change on Earth .Based on a comprehensive calculation ,the authors came to the conclusion that besides the robust increase of greenhouse gases(CO2 ,CH4 ,etc .) , there are also other factors that cause global warming , but this paper focuses on the angular change between Earth's axis and its ecliptic plane .According to the paper ,both the internal variables(earthquake ,wind ,tide ,rocket's launching ,etc .) and the external variables(the sun's motion , other planets' motion ,meteoric stone ,etc .) impacted greatly on this angle .What's more ,no matter to what degree this angular change arrives at ,it inevitably causes the climate change on Earth throughout the time .
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