The following article discusses several notable problems in reinforced concrete well-shaped beam design from structure of reinforced concrete well-shaped beam floor,well-shaped beam compression calculation and design of steel bars placing,which to give a reference for construction designer.

Qualitative representation and reasoning of topological relations and directional relations are given in detail respectively. And qualitative reasoning of directional relation based on Space with Neutral Zone, with the theorem that is satisfied, is also presented.

A kind of ring-spoke floor structure is presented and its mechanics characteristic is illustrated by comparing with #-shape beam structure,at the same time,application of a project is introduced,and it can give a reference to the design and research further of this structure.

The design of a round roof garden with a diameter of 42.2m and the total loads being about 20kN/m~2 is introduced. After comprehensive comparison,the cross-grid steel beam structure of large span with welded H section was used.

As a result, a gray humus horizon with well-shaped fine granular and coprolitic structure has been formed within the body of the former plow layer.

Many of such optimization criteria have been suggested for chromatograms in which all or a number of well-shaped peaks need to be separated.

Well-shaped peaks were obtained for trace organic acids using dilute sulfuric acid as mobile phase.

In addition, the well-shaped hysteresis loop also showed that the film had a well performance in ferroelectric.

Selenosulphate anion yields in alkaline solutions of 0.2 Mol Na2CO3 and 0.2 Mol Na2SO3 a well-shaped polarographic wave, which makes possible the determination of tetravalent selenium within the concentration range of 10-5 to 10-3 Mole.

Two methods for analyzing caisson-beams are introduced in this paper.One is the well-known method of redundant forces. The author has simplified this methed by using couples of redundant forces to set up a typical equation and pointing out the rule that the matrix of the coefficients of simultaneous linear equations which are organized from the expansion of that typical equation. This method can be easily solvd when the number of unknown redundant forces, or that of equations, is less than 3 or 4; but it will...

Two methods for analyzing caisson-beams are introduced in this paper.One is the well-known method of redundant forces. The author has simplified this methed by using couples of redundant forces to set up a typical equation and pointing out the rule that the matrix of the coefficients of simultaneous linear equations which are organized from the expansion of that typical equation. This method can be easily solvd when the number of unknown redundant forces, or that of equations, is less than 3 or 4; but it will be difficult when the number is more than that. In order to solve this difficulty the author suggests another kind of method of which the essential principle is mentioned in the following.Supposing that the distance between the beams is sufficiently short in comparing with their spans, we can set up a partial differential equation for its deffiection W, as we often do in the theory of elasticity. In this way we can solve it with its boundary conditions of simple supporting by sine series. From this we can easily get the formulas of bending moments, shears and twist moments of each beam by partially differentiating the function of deffiection. The result of the calculation proves that it quite agrees with the method of redundant forces when the distance between beams is no longer than 1/5 of their spans.There are some tables given in this raper for practical use.

The finite difference equations are applied in this paper for the analysis ofcaisson-beam, which is composed of two intersecting sets of parallel beams,namely the longitudinal beams and the transversal beams. Two cases of caisson-beam have been discussed in this paper. In the first case, all the 1ongitudinalbeams are arranged in equidistance and have the same stiffness, all the trans-versal beams are also arranged in equidistance and have the same stiffness. Byusing the method of redundant forces and deformations,...

The finite difference equations are applied in this paper for the analysis ofcaisson-beam, which is composed of two intersecting sets of parallel beams,namely the longitudinal beams and the transversal beams. Two cases of caisson-beam have been discussed in this paper. In the first case, all the 1ongitudinalbeams are arranged in equidistance and have the same stiffness, all the trans-versal beams are also arranged in equidistance and have the same stiffness. Byusing the method of redundant forces and deformations, we obtain a set ofsimultaneous partial finite difference equations, where the deflections of the jointsand the bending moments of longitudinal beams and transversal beams at jointsare unknown functions. The finite sine series are used in the solution of theseequations. In the second case, all the transversal beams are arranged inequidistance and have the same stiffness, while the longitudinal beams arearraseed in arbitrary distances and have different stiffness. By using the methodof redundant forces, we obtain a set of simultaneous ordinary finite differenceequations, where the bending moments of the longitudinal beams at joints areunknown functions. The general method for solving these equations has beendiscussed.

This paper summarizes the design and construction of unbonded partially prestressed concrete two-way floor grillage girders used in the multi-functional hall in the east bulding of Beijing Scientific and Technological Center. This paper also describes the rationality and economic effect of the 27m span unbonded partially prestressed concrete grillage girders and introduces the resolution of the main structural problems in design by choosing feasible structural system and comparison of schematic designs. During...

This paper summarizes the design and construction of unbonded partially prestressed concrete two-way floor grillage girders used in the multi-functional hall in the east bulding of Beijing Scientific and Technological Center. This paper also describes the rationality and economic effect of the 27m span unbonded partially prestressed concrete grillage girders and introduces the resolution of the main structural problems in design by choosing feasible structural system and comparison of schematic designs. During construction, the elastic compressibility of girder, the loss of prestressing and the camber of girders are observed and measured. In conclusion, suggestions for design have also been proposed.