最新刊期
卷 14 ， 期 4 ， 1992
- 摘要：In this paper, the finite element method(FEM) is carried out for the contact pressure under circular foundation with visco-elastoplastic model and a 8 node finite element program determing parameter. In order to prove the reliability of the theoretical analysis, a circular rigid loading plate test on remolded clay is done. Otherwise, a comparison of the measuring contact pressure under box foundations of highrise buildings in Beijing and Shanghai with the calculated value by different method is made. The result shows the calculated value by the method proposed in this paper is more coincident with practical data.714|9|0更新时间：2023-11-28
- 摘要：For design purposes, this paper presents performance coefficients for steel structures of tall building, and furthermore design values of strength of heavy plates. The calculated results show that suggested coefficients meet the requirements of probabilistic limit states design method. They can serve as a supplement to GBJ17-88 and the expression of limit states design provided in this paper is available for reference in compilation of concerned standard.485|7|0更新时间：2023-11-28
- 摘要：Moment slope displacement equations of beams with two end semirigid connection restraints are covered. The evaluation of column effective length factor both braced frames and unbraced frames with flexible joints is derived. Determination of column effective length method proposed herein is. exactly the same as those of rigid frames which was well established in Chineses Specification of Steel Structures, however, the restraining stiffness of girders to columns should be amended semirigid connection is applied.511|8|0更新时间：2023-11-28
- 摘要：This paper is a comprehensive report about the research of high efficient energy-saving ammonia air cooler. In the paper, it is introduced that the test of two-side long V-groove finned pipes which are fit for the evaporators of ammonia air coolers, optimum experiments of the finned pipes, and field experiments of contrasting the model machine with the old one in a cold storage. The result shows that the air-side heat transfer performance coefficient and the overall heat transfer performance coefficient of the two-side optimum long V-groove finned pipes are higher from 18.25% and 12.85% than those of conven tional rectangular plain-plate finned pipes respectively. At last, it is introduced the structure design of the high efficient energy-saving air cooler. Used by a few of units, it is proved that this type of air cooler has characteristics of compact structure, less floor area occupied, high heat transfer efficiency, convenient maintenance and management, and is of notable economical effect.765|8|0更新时间：2023-11-28
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- 摘要：In this paper,the four-moment reliability analysis method for perfopmance function implicit structure is discussed. Discrete formulas expressed by Gauss-quadrature are presented when determine the parameter of probability density function which is established based on maximum entropy theory. The method in this paper is proposed for performance function implicit structure. Particularly, the discrete formulas used in this paper largely reduce calculating work with the same precision, so that the time-consume problem of four-moment reliability anlaysis is solved.813|7|0更新时间：2023-11-28
- 摘要：This paper solves the geometrically nonlinear problems of symmetric, cross-ply laminated anisotropic rectangular plates subjected to uniformly distributed load by the higher-order shear deformation theory and taking an advantage of the perturbation and the weightedresidual method. First, with the help of the perturbation, the nonlinear partial equations have been changed into linear ones. This paper can solve these linear ones by the weighted-residual method. The combination of quintic B-spline functions are chosen as the basis of trial function and Dirac delta functtion, the weighted function. The method used in this paper is simple, direct and efficient. The numerical results show a good convergence and they are in good agreement with the available data.641|10|0更新时间：2023-11-28
- 摘要：Gross product of construction industry is total outcome by construction and production of construction industry. This paper analyes and fully evaluates the function and character of gross product of industry and puts forward the necessity and detailed suggestion of reforming the statistics method of gross product of construction industry according to the needs of theroy and practice.675|7|0更新时间：2023-11-28
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LARGE DEFLECTION OF A CIRCULAR PLATE ON PASTERNAK FOUNDATION UNDER A CONCENTRATED LOAD AT THE CENTER
摘要：Based on Karman's nonlinear foundamental differential equations, the new method combines perturbation method with integral equation method is forward to solve nonlinear bending of a clamped circular plate on Pasternak foundation under a concentrated load at the center. This method is simple and easy to use. The numerical results show that the present solution is reliable.772|7|0更新时间：2023-11-28 - 摘要：On the basis of analysing problems of conventional fuzzy controller in the design of the structure and algorithm, this paper puts forward a kind of control algorithm that is fuzzy and Adaptive PI coordinate decision controller (FACDC) . It adopts the hierarchial control structure imitating intelligent control and combines fuzzy controller and adaptive PI controller. It takes full advantage of two controllers. Since the algorithm of FACDC in model reference fuzzy adaptive algorithm, it avoids the complexity of conventional adaptive algorithm.602|8|0更新时间：2023-11-28
- 摘要：In this paper, the concept of basic for linear vector extreme value problem is introduced in the partially ordered vector space. Some properties and results of the linear programming are generalized. And the existaence therom of basic optimal solution is proved.645|7|0更新时间：2023-11-28
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- 摘要：The volume of supply air of an underground water powerhouse is very large. Three methods of air distribution that do not occupy a lot of useful space, these methods are studied by scale model tests in this paper. The results of the tests show that the thermal environment quality at the far end away from the gate is poor if air is supplied from the gate. The velocity may be too high at some points in occupied zone if air is supplied from an end wall. This problem can be solved by reducing the supply air velocity or using an auxiliary slot. The effect of supplying air from the ceiling is satisfactory. The arrangement of one inlet under the ceiling for each generator's zone is recommended.491|9|0更新时间：2023-11-28
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