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24 April 1989, Volume 8 Issue 2 Previous Issue    Next Issue

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Numerical Processing of Wave Flow Patterns on Surface Particles Ren Zuogao 1989, 8(2): 1-7.  Abstract ( )   PDF (1715KB) ( )   The present paper provides an approximate method for the determination of velocity potential of nonlinear wave field by means of deformation about wave flow pattern on water surface particles. The method is based on Rienecker and Fenton's numerical wave theory.A program has been made according to the method. A photograph of typical wave flow visualization has been quantatively analysed. The calculated wave surface profile and velocities are compared with experimental ones and show a good agreement. Related Articles | Metrics

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Test and Analysis of Some Design Problems in Partially Prestressed Concrete Beams Zhou Yuandi, Chen Yeying 1989, 8(2): 8-19.  Abstract ( )   PDF (702KB) ( )   This paper discusses the test results of two groups of partially prestressed concrete Ⅰ and T beams, with the flange depth ratio of one,and analyses the feasibility of using class Ⅲ steel bars for non-prestressed reinforcement, the non-prestressed steel stress variation along the span, the shear lag in the beam flange, the effect of section type on the hypothetical tensile stresses, crack computation, etc. Related Articles | Metrics

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Traffic Engineering Design of High-Type Highway——Conception of the Traffic Engineering Design of Cheng-Yu Highway Cui Bingquan, Xiu Yusheng 1989, 8(2): 20-30,53.  Abstract ( )   PDF (814KB) ( )   In this paper, we present the basic conception of traffic engineering design of Cheng-Yu Highway and its main points. Then we deal with the design principles of traffic engineering for high-type highway and with some practical problems. Related Articles | Metrics

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Analysis of Continuous Curved Bridges and Skew Bridges by the Finite Strip Method Yu Tonghua, Zhang Pengtao 1989, 8(2): 31-40.  Abstract ( )   PDF (587KB) ( )   This paper deals with the analysis of the continuous curved bridges and Continuous skew bridges both with inner diaphrams, using the computer program for analysing the simply-supported curved bridges by the finite strip method to develop a generalized computer program for analysing those two types of bridges so as to make the finite strip analysis of the curved bridge and skew bridge applicable in engineering practice. Emphasis is put on the principles and procedures of compiling the computer program. Related Articles | Metrics

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Analysis for Prestressing of Curved Continuous Box Girder Bridges Xu Xiaofeng, Huang Jianyuan 1989, 8(2): 41-53.  Abstract ( )   PDF (743KB) ( )   Based on the theory of thin-walled girder, two design methods for the prestressing of curved continuous box girder bridge are developed. In the first method, the bending moments of the section have been cancelled, while in the second one, the bending moments as well as the torsional moments and the shearing forces have all been eliminated. As a practical application, both methods have been compared and analysed. Related Articles | Metrics

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A Practical Analysis Method for Lateral Stability of Open Tied Arch Bridge Du Guohua, Mao Changshi 1989, 8(2): 54-67,88.  Abstract ( )   PDF (786KB) ( )   In this paper, an approximate analytical solution for lateral stability of open tied arch bridge is developed. The method is based on approximate displacement functions and initial stress method. The results of the analytical method are shown to agree quite well with those of the finite element method, and the method will be quite convenient to use. Related Articles | Metrics

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Study on the Size Distribution of Nonuniform Bed Load Zhang Xujin, Zhao Shigiang 1989, 8(2): 68-78.  Abstract ( )   PDF (743KB) ( )   Based on the analysis of a large amount of experiment data in this paper, the relationship among the size distribution of nonuniform bed load, bed material and water factors is studied. According to the turbulent velocity following the normal distribution and exchange between bed load and bed material in an equal state in steady sediment transportation, the expression of the size distribution of bed load as well as the calculating methods is obtained by mechanics and mathematics analysis and experiment research. The size distribution curves of bed load calculated by the present method are in good agreement with experiment data. Related Articles | Metrics

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Experimental Research on Behavior of Laterally Loaded Pile Group in Cohesive Soil He Guangchun 1989, 8(2): 79-88.  Abstract ( )   PDF (604KB) ( )   This paper presents the research on the behavior of laterally loaded pile group in cohesive soil through model tests and the results are analysed by means of non-dimensional contrast of p-y curves. It shows that the front pile in a row pile may be treated as single pile and the group effect to the rear pile is considered with the reduction coefficient, η. The main factors affecting η,such as pile spacing, depth and loads are thoroughly analyzed in this paper and a formula is proposed. By comparison with data obtained from a site-test, the calculations satisfy the measure-ments. A reference to design on pile foundation concerned is recommended. Related Articles | Metrics

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The Wear and Tear and Service Life of Road Machinery Guo Xiaohong 1989, 8(2): 89-95.  Abstract ( )   PDF (476KB) ( )   The wear and tear of road machinery and four kinds of service life are discussed here. It is pointed out that the service life of road machinery should be based on its economic life in order to reduce its annual running maintenance cost of the machinery and to increase the economic benefit of the construction enterprise. Then several methods to calculate the economic life are introduced. Related Articles | Metrics

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Development of an Analytical Method for the In-Situ Structural Stiffness Evaluation of Flexible Pavement Tang Boming, Deng Xuejun 1989, 8(2): 96-103.  Abstract ( )   PDF (597KB) ( )   Based on the hypothesis of elastic layered theory, by analyzing the character of surface deflection basins the algorithms and nomographs for deflection-basin interpretation were developed. Related Articles | Metrics

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Research on Camshaft Wear in Diesel Engine Huang Qiangui 1989, 8(2): 104-110.  Abstract ( )   PDF (497KB) ( )   This paper lays stress on studying damaging characteristics, properties, forming roles and adhesion wear of the camshaft and tappet in S195 diesel engine. The forming causes, moreover, will be discussed and some factors which can affect all the properties above mentioned will be described in this paper. Related Articles | Metrics

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Medium-Scale Integrated Circuit (MSIC) Application to Composite Circuit Design Du Jiaxin 1989, 8(2): 111-117.  Abstract ( )   PDF (426KB) ( )   Since MSIC was invented, its application to composite circuit design has become a new subject for researchers. This paper suggests and discusses, theoretically, two types of MSIC: pplied to the composite circuit designs. Related Articles | Metrics