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27 August 1983, Volume 2 Issue 4 Previous Issue    Next Issue

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Calculation of Inclined Cracking Shearing Force and Shearing Strength of Simply Supported Precast-Prestressed-Compound Beams with Concentrated Load Pang Tien-ming 1983, 2(4): 1-10.  Abstract ( )   PDF (777KB) ( )   According to the experimental data of 25 precast-prestressed-compound concrete beams,the author offers the formulas of the inclined cracking shearing force and shearing strength of the beams.They are simple and easy to use.They are in better agreement with the experimental data,preeast-prestressed-compound concrete beams compared with reinforced concrete beams.The inclined cracking shearing force is increased 40%.The shearing strength in general is increased 20-25%.The author also researches into the problem of the problem of the horizontal cracking of the beam's connection and gives the control method of calculation to avoid the horizontal cracking. Related Articles | Metrics

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The Recursive Estimation Method of Wind Wave to Full Consideration of the Effects of Early Days Wind Wave Gu Heng-yue 1983, 2(4): 11-22.  Abstract ( )   PDF (915KB) ( )   It is very important for every wind wave forecasting formula to deal correctly with the effects of early days wind before the coming of this wind wave.So this is a research problem with great value and great attention is paid by the scholars of every country scholars of every country.On the basis of logical inference,in accordance with two states of wind wave growth,this paper proposes a functional relation formula H(U,T'e)=H(U,F'e) In order to enable this formula to satisfy the equivalent condition of the quivalent wind time and the equivalent wind field,the recursive estimation method is utilized.Consequently the precision of wind wave forecasting is manifested due to the full consideration of the effects of early days wind wave. Related Articles | Metrics

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The Direct Method for Calculating the Influence Line of the Transverse Load Distribution in the Hinged Girder Du Guo-hua 1983, 2(4): 23-35.  Abstract ( )   PDF (647KB) ( )   For making use of the characteristic of a formal resemblance between the influence line of the transverse load distribution and the transverse deflection curve in the hinged girder under a concentrated unit loading,a simple analysis formula for calculating the influence line of the transverse load distribution in the hinged girder is derived with the help of the finite difference method in this paper.This method not only has the function of the present computing tables,but also it may be applicable to the structure with an arbitrary number of the hinged girders which are difficult to be solved by the present computing tables. Related Articles | Metrics

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The Ultimate Load of the Arches Wu Ming-dong 1983, 2(4): 36-45.  Abstract ( )   PDF (682KB) ( )   This paper describes the failing behaviour of the double arch as it subjects to a convergent load at the quarter span and presents the predictions of the ultimate moment in the cross-section and the determination of the ultimate load. Related Articles | Metrics

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The Influence Line of Kern Moment in Arch Bridges and Its Applications Zhou Yi-wu 1983, 2(4): 46-52.  Abstract ( )   PDF (373KB) ( )   This paper presents a practical method and program to graph the influence line of kern moment.Basing on this,it also advances a method,to graph the influence line of normal stress at upper and lower edges of the main arch of arch bridges and its application to the construction of arch bridges without scaffold. Related Articles | Metrics

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Calculation of Sheet Piles Guo Zhong-qin 1983, 2(4): 53-64.  Abstract ( )   PDF (728KB) ( )   Sheet piles below the dredged surface are regarded as straight piles acted on by the cross load.According to the Calculations of "Norm of the Pile Foundation" of the People's Republic of China and the harmonious conditions of the displacement of anchored points,the pull of the anchoring rod will be worked out.This brings the calculation of sheet piles in agreement with the standard specifications of pile foundation.The calculation is very simple by means of the coefficient tables in the end of this paper. Related Articles | Metrics

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Calculation of the Strength and Checking of the Strength About Large Eccentric Compression Members Made of Reinforced Concrete with Circular Section Long You-qing 1983, 2(4): 65-78.  Abstract ( )   PDF (776KB) ( )   Usually an adopting cut-ami-try method is used for calculating strength of the forge eccentric compression members made of reinforced concrete with circular section.This paper,according to the original equations,puts forward the relationship between the functions,one of which is about the coefficient dispensing reinforcement on a section.Furthermore,in this paper the values of the function are listed in the tables which may simplify the original calculation and may be thus checked. Related Articles | Metrics

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Lime-Fly Ash-Stabilized Bases Liang Fu-guan, Ou Ming-xing, Ding Liang-kai 1983, 2(4): 79-99.  Abstract ( )   PDF (1455KB) ( )   This paper presents the achievement in scientific research on lime-fly ash-stabilized bases.The content includes:selection of mixture proportion;mechanical strength of mixture;road characteristic of mixture;design factors;pavement performance evaluation;etc.Test data confirm that the lime-fly ash is a high-quality and low-cost road material.The fly ash of inferior quality produced in Chongqing can be used to cons truct high-strength bases. Related Articles | Metrics

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The Static Plane Product Method of Calculating the Displacement of the Girder Yin Gui-ming 1983, 2(4): 121-126.  Abstract ( )   PDF (326KB) ( )   The static plane product moment method of calculating the displacement of the girder is another method which is similar to the graphical method of multiplication in the books under the condition of a unit force acting on the structure for determined distortion.In case the load is complicated and heavy,the adoption of the static plane product moment method is simple and intuitive.Without plotting the bending moment graph,we are able to calculate the various related displacements and the deformed clastic curves of the determined girder. Related Articles | Metrics