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30 April 1982, Volume 1 Issue 1    Next Issue

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The Discrete Component Method in Nonlinear Dynamic Response Chen Xueyuan 1982, 1(1): 1-10.  Abstract ( )   PDF (5519KB) ( )   A method for dynamic response analysis of the nonlinear systems is presented. It is the development of the mode-superposition procedure and the modal synthesis method. The system of nonlinear differential equations is uncoupled to self-consistent nonlinear differential equation without reference to mass, equations are solved directly. This algorithm can be employed for solving problems involving buildings dynamic foundations, bridges and vehicles. A computer program is presented and some numerical examples illustrating the effectiveness of the method are given. References | Related Articles | Metrics

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Static and Dynamic Nonlinear Analyses of Cable-Stayed Bridges Wang Xiangjian 1982, 1(1): 11-28.  Abstract ( )   PDF (9708KB) ( )   In this paper a space computation model for cable-stayed bridges is proposed. Having introduced the eccentric space thin-walled girder and the space combined cable elements, the author has derived element elastic stiffness matrix, geometric stiffness and masse matrix. The nonlinaer behaviour of cable tension which depends on the change of deflection is included in equivalent geometric stiffness. The nonlinear behaviours of beam and tower resulting from axial-flexual deformed interaction are considered. The nonlinear static equations are solved by modified iterative method. In dynamic analysis with the consideration of axial force effect the natural vibration property for systems of plane and spave is computed in consistant-mass matrix, so that data can be provided for determining critical wind velocity. In dynamic response analysis (earthquake and vehicle vibration) dynamic nonlinaarity is considered by using linearized mode superpostion method in order to use middle-small sized computers. References | Related Articles | Metrics

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The Selection of Strength for Metals under Isothermal Statical Loading Wu Hengli 1982, 1(1): 29-35.  Abstract ( )   PDF (3653KB) ( )   This paper presents the selection of strength of solids under isothermal statical loading, making use of von Mises equation of plastictiy (1) in text, and two of other formulas （2') and (3') in text. References | Related Articles | Metrics

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Earthquake Internal Force on Arches Yang Gaozhong, Guo Tangjun 1982, 1(1): 36-53.  Abstract ( )   PDF (9548KB) ( )   In this paper a new viewpoint of earthquake internal force, which must be considered in pull-press oscillations of arches, has been proposed. References | Related Articles | Metrics

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An Exploration for Automated Design of Arch Bridges Chen Guozhen, Gu Anbang 1982, 1(1): 54-60.  Abstract ( )   PDF (2639KB) ( )   In this paper we explore some problems for automated design of arch bridges and several applicable advanced methods, which have been used in our designs, are recommended. Related Articles | Metrics

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Applying the Semi-Analytical Finite Element Method to Calculate the Axisymmetric Shell Structure Zhang Liying 1982, 1(1): 61-75.  Abstract ( )   PDF (7634KB) ( )   This paper applies the finite strip method to analyze the problems of static mechanics and stability under the action of non-axisymmetric loads and it has given all the formulas of calculation. At the same time these formulas have been programed, and the calculation results of model examples have been compared with the accurate values. References | Related Articles | Metrics

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Exploration of Some Problems in Bridge Foundation Design Qi Xiji 1982, 1(1): 76-85.  Abstract ( )   PDF (5706KB) ( )   The purpose of this paper is to tackle the problems on buoyancy, earth pressure and settlement calculation in bridge foundation design. The author's sugestions are as follows: (1) On the buoyancy: Suggest that the buoyancy should be regarded as a check of the bearing capacity of subgrade in clay. (2) On the earth pressure: Suggest that the experimental value of coefficient for at-rest earth pressure should be regarded as a recommendable value of "Design Norm of Bridges and Culverts of High-way" in our country. (3) One the settlement: Suggest that the settlement formula of the Architectural Institute of China should be regarded as a recommendable settlement formula of "Design Norm of Bridges and Culverts of Highway". . References | Related Articles | Metrics

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Stress Analysis of Persimmon Hole Xu Shengchao 1982, 1(1): 86-97.  Abstract ( )   PDF (6642KB) ( )   In this paper, we find a function of conformal mapping of persimmon hole with the scheme method: z=cω（ξ）[1.115ζ^1-0.1057ζ^3-0.011ζ^7+0.0023ζ^11+……], which transforms the plane on the outskirts of persimmon hole into the interior of unit circle, subsequently, according to the theory stated in [1] the solution of the unidirectional and the bidirectional stresses acted on the plane and the pure columnar bend, the pure bend and the torsion. References | Related Articles | Metrics

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Anaysis of the Criteria for the Fixed Bed River Models Deng Boqiang 1982, 1(1): 98-105.  Abstract ( )   PDF (4144KB) ( )   This paper points out that if the line of water surface in a prototype river is similar to that in a model river, both prototype river and model river will satisfy the gravity similarity criterion and the resistance similarity criterion. These two criteria must be satisfied in fixed bed river models. #br# According to the Beronoulli equation we shall obtrain the result shown above, but there will be a process before we can obtain it. #br# The following is the scale relations for the fixed bed river models: #br# (1) For the geometrically similar systems: #br#δn=δl^(1/6) or δλ=1 #br# (2) For the so-called distorted river models (here δl ≠δh): δn=（1/δl)^(1/2)(Rp/Rm)^(2/3) or #br# δλ=(1/δl)(Rp/Rm) #br# All these various formulae are based on the Bornoulli equation. Related Articles | Metrics

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A New Type Abutment of Arched Bridge-the Back-Framed Abutment Pang Guangyou 1982, 1(1): 106-113.  Abstract ( )   PDF (4338KB) ( )   This paper describes a new type back-framed abutment. It satisfies both the stability during construction and guarantees that the foundation of the abutment may closely adhere to the soil in situ, so as to be able to support rationally the action on the main arch. Related Articles | Metrics

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Design of Special Compound Curve Tang Erji; Xiao Shengxie 1982, 1(1): 114-123.  Abstract ( )   PDF (5715KB) ( )   If the compound curve is appropriate for the road line and it can not be designed with general compound curve, because of the objective conditions, we may use design of special compound curve. #br#This paper has derived the "Jia-Lin" formula which describes the character of special compound curve and the law of development for it. This formula can be used in the design of general compound curve too. At the same time this paper provides a simple procedure which can be used in the road construction. Related Articles | Metrics