Archive

15 June 1994, Volume 13 Issue 2 Previous Issue    Next Issue

---

For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Select

Some Problems in Theoretical Study on Comprehensive Transportation Zhao Yiping,Nu Anzhou 1994, 13(2): 1-7.  Abstract ( )   PDF (488KB) ( )   Considering the lacking and backwardness of theoretical research in comprehensive transportationat present,this paper has diseussed some of the vital problems in comprehensive transportation theorythat include the relationship between transportation and economic development,theory of transportstructure evolution and rational division of labor among five modern modes of transportation. The au-thors have thoroughly explained their position on those issues discussed above by means of intreducingtheories abroad that are related to the relationship between transportation or infrastructure and econom-ic development or growth in developing countriea. References | Related Articles | Metrics

Select

Features of Turbidity Maximum in Yangtze river Estuary Zhou Huajun 1994, 13(2): 8-15.  Abstract ( )   PDF (472KB) ( )   The occurrence of a turbidity maximum is a most common phenomenon in the brackish water re-gions of tidally influenced river.Based on analysis of meaured data,the dynamics of the turbidity max-imum in Yangtze River eatuary is investigated,The evolution patterns of the turbidity maximun duringatidal cycle is shown and analvsed.The time histories of sediment concentrations and current velocityare discussed for characteristic locations within the turbidity maximum。The results derived from timeseries show that the deposition and resuspension of sediment is the dominant Drocess in the turbiditymaximum and that the advection of particals is the dominant process,at marginal zones during well-de-fined times of the cycle,The analyses also show that the suspended sediment settles significantly in themiddle and lower reach during the low water slack and in the uppor and middle reach during high waterslack.Rapid settling of suspended sediment is asseeiated with the water body at salinities ranged from 5‰ to 1 5‰. This reflects that the effect of salt flocculation may be significant around slack water. References | Related Articles | Metrics

Select

The Method of Microstructure Analysis of Cement Paste Gong Shanglons,David Darwin 1994, 13(2): 16-21.  Abstract ( )   PDF (371KB) ( )   Based on results of test, this paper introduces a new method of microstructural analysis of cementpote using SEM and phases analysis system, with certain improvements in making specimens, instru-ment calibration and mierocrack survey. So better results can be obtained according to the new method. References | Related Articles | Metrics

Select

Fuzzy Reliability Analysis of Cement Pavement He Zhaoyi,Xiao Shengxie 1994, 13(2): 22-25.  Abstract ( )   PDF (194KB) ( )   In this paper,fuzzy reliability of the cement pavement is analysed by means of structure fuzzy the-ory.Calculation results proved to be reliable and valuable。 References | Related Articles | Metrics

Select

Computer Aided Modeling and Design of Horizontal Alignment of Interchange Ramp Wu Guoxiong,Li Fang 1994, 13(2): 26-34.  Abstract ( )   PDF (422KB) ( )   Based on the theory and method of three order B-spline modeling,the horirontal alignment oframp can be outlined in the contour map and its length and azimuthes of ternminal points can also beobtained。Then its curvature figure can be layouted by calculating curvaturee and radii of discretepoints along horizontal alignment.After the curvature flgure is medeled on the screen by using themouse,the horizontal design elements of ramp can be obtained。At last,the horizontal alignment oframp can be designed and layouted quick ly based on the unit“Ls+Ly”。 References | Related Articles | Metrics

Select

A Fuzzy Method for Estimating Behavior of flexible Pavement Yang Xiwu,Chen Guozhen 1994, 13(2): 35-39.  Abstract ( )   PDF (273KB) ( )   A fuzzy method for estimating behavior of flexible pavement is intreduced in this paper.Accord-ing to the estimation index system presented, a comprehensive estimation model is built and an exampleis given. References | Related Articles | Metrics

Select

Calculation on Deflection of Rectangular Plates of Reinforced Concrete Jiang Ronggui 1994, 13(2): 40-44.  Abstract ( )   PDF (211KB) ( )   Rectanlar plates of rein forced concrete are orthoeropic plats,This paper deseribes a method calcu-lating centre deflection of this kind of plates with simple or fixed supports on four sides。 References | Related Articles | Metrics

Select

Simplified Analysis of Anisotropic Skew Plate Mao Changshi,Du Guohua 1994, 13(2): 45-53.  Abstract ( )   PDF (366KB) ( )   n this paper,a simplified analysis method of anisotropic skew Dlate is Dresented.It is based nnbending moment- curvature and twisting monent-torsion relations of beam theory in strength of materi-als,The resulting cxpressions for bending moment,twisting moment ,shearing foree and equilibriumequations are reliable. References | Related Articles | Metrics

Select

Considerations on Managerial Modernization of Highway Disasters in Sichuan Chen Hongkai,Tang Hongmei 1994, 13(2): 54-59.  Abstract ( )   PDF (376KB) ( )   here is a potential crisis in the course of economy development of Sichuan province,which comesfrom the heavy waste watering of highway disasters in this region,This paper prelimarily diseusses thenecessity ,urgeny and possibility for the consruetion of managerial modernization of highway disastersso as to improve the zonic nignway communieations, and chiefly makee some approacnes for tne mod-ernizatiom of managertal system,managerial orgnization,managerial method and managerial measure.The basic work is to form a spocialist group(or cummittee)on diagncosis,prevention and harnession ofwaste watering of highway in sichuan province。 References | Related Articles | Metrics

Select

An Useful Method for Analysis of Pile Group of Bridge Wang Fumin 1994, 13(2): 60-68.  Abstract ( )   PDF (439KB) ( )   The author has estaalished a mechanical model based on the theory of elastic foundation beamsand derived a useful formula for calculating the internal forces of a pile group,using transfer matrixof curved beams in horizontal plane. The derivation is also based on calculation assumptions for pile-group foundations of bridge structures given in relevant bridge specifications。 References | Related Articles | Metrics

Select

Statistical Aanalysis of Physical Parameters of Embankment Fill Deng Weidong,Tang Xiouying 1994, 13(2): 69-76.  Abstract ( )   PDF (416KB) ( )   This paper has statistically counted and anlyzed the physical parameters of three embankmentfills which include the unit weight,moisture content.compacting factor etc,Some problems on designand test of a embankment has been diseussed. References | Related Articles | Metrics

Select

Large-Strain Consolidation Equation and Its Matrix Form Based on Material Configuration Xie Yongli,Pan Qiuyuan 1994, 13(2): 77-82.  Abstract ( )   PDF (269KB) ( )   dimensional large- strain consolidation of sarurated soil have been developedwith material deseription method in this paper, which provides a basis of further analysis of large-strainconsolidation by FEM. References | Related Articles | Metrics

Select

Wind Resistant Design for Akashi Kaidyo Bridge Ma Jin,Zhou Qingtong 1994, 13(2): 83-89.  Abstract ( )   PDF (372KB) ( )   This Papaer briefly introduces the fundamental conception of statical and dynamic reaction pro-duced by the stru cture under wind action,On th is basis,a briefing is made on the design procedure forwind rersistance,the computation of basic wind velocity and deaign wind velocity of the world’s largestspan suspenslon bridge at present(L= 1990m)一the Akashi Strait Bridge in Japon, Analysis is madefor the characteristics of wind variation ,angle of attack,static design of wind,the checking computa-tion for wind resistance and so on,and mathematical calculations are performed for the basic wind ve-leeity during the construction of the Bridge。 References | Related Articles | Metrics

Select

Surface Treatments of Automotive Parts with Laser Zheng Ling,Li Yinong 1994, 13(2): 90-93.  Abstract ( )   PDF (230KB) ( )   Develupmeet of powerful laser devices provides a better basis for surface treatment of automotive parts than ever,Automotive pistun pins and valve tappets made of steel 45# are hardened by laser with chcoen technological parameters,then mierostructure,hardness distribution; wear reeistance,defor-mation and service life are analysed and evaluated.The reeults show that piston pins and valve tappets hardened by laser proceesing have the advantage of good hardening quality,less deformation and low reject,and their service life is four times loriger than those hardened by routine method. References | Related Articles | Metrics

Select

Effect of Oriented Groin Angle on Deposition Between Two Groins Xu Guangxiang,Liu Jianxin,Cheng Changhua 1994, 13(2): 94-98.  Abstract ( )   PDF (273KB) ( )   on the basis of expermental researches,this paper discussed effect of oriented groin angle(the an-gle included between flow and sroin)on deposition between two grions,size of dammed water and range of erosion and obtained some valuable exporimental data and analytical results References | Related Articles | Metrics

Select

Measure and Contorl System of Model Test for Steel Coffer Sink at Huangshi Yangtze River Bridge Ding Shengqi 1994, 13(2): 99-104.  Abstract ( )   PDF (340KB) ( )   In this paper,the sensors of anchor cable stress and sink depth of steel cofferdam as, well as mea-sure and control system of model test for steel cofferdam sink at Huangshi Yantze River bridge is pre-sented,The mensure principle,composition of this system,computer hardware and software are also,proposed。 References | Related Articles | Metrics

Select

Randomly Weighted M-estimate of the MultivariateLinear Regression Coefficient Liang Suanyan,Wang Wenzhi 1994, 13(2): 105-113.  Abstract ( )   PDF (384KB) ( )   This article studies the consistency, asymptotic normality. hypothesis testing of M-estimate of themultivariate linear resression coefficient by minimizing the randomly weighted sum (Yi-X’iβ) . and the Bootstrap approximation to the distribution of nonrandom weighted M-estimate. References | Related Articles | Metrics

Select

Particularities of Periodicals of Science and Technology in Editing Yang Yan 1994, 13(2): 114-117.  Abstract ( )   PDF (241KB) ( )   In this paper,the constitution,chief types content characteristics of periodicals of science and tech-nology are described. And the main characteristica that differ from other poriedicals are pointed out.Inaddition,the porticu- larities of periudicals of science and technology in editing are summarized. References | Related Articles | Metrics