Abstract:In this pager, four full-scale corner joint assemblies of reinforced concrete frame beam and column with different detail structure are tested under low cycle loading, The process of damage development and the characteristics of break of the assemblies in the course of alternately increasing positive and negative bending deformation are learned Strength, stiffness and ductility of assemblies and the various regulations of energy consumption are also studied. Compared with these properties, the anti-seismic behavior is tentatively commented. Besides, the test results of the strain distribution of beam and column longitudinal bars and stress state of joint stirrups are analyzed.

Abstract:This paper presents a theoretical mathematical model of capacitance sensor for moisture measurement. The practical mathematical model is provided using least squares theory, an applied example shows higher accuracy of the model.

Abstract:本文对电石渣沸腾炉渣在60℃和100℃的饱和蒸汽中的水热合成反应进行了研究,并对在上述条件下制得的电石渣沸腾炉渣(CF)胶结料及其混凝土(CFA)的主要物理力学性能进行了测试。结果表明:电石渣沸腾炉渣胶结料及其混凝土作为墙体建筑材料将有较大的发展前途。

Abstract:In this paper, an exponential function is introduced to modify the viscous element of Burgers model. The result shows modified Burgers model is advantageous to describe the creep behavior of hardened concrete and the creep test results are in good agreement with the theoretical predictions of creep equations derived from modified Burgers model.

Abstract:This paper suggests a zenith luminance converting factor. By means of multiplying outdoor horizontal sky illuminance by this factor, the value of zenith luminance of the sky can be obtained.

Abstract:In this paper, a necessary optimality condition of problems with equality constraints is investigated by the implicit function theorem in n-dimensional Euclidean space. A new approach solving these problems is obtained. The number of dimensions of corresponding system of equations is less than the classic Lagrangian multiplier method.

Abstract:On the basis of the analysis of load operational characteristics, this paper discusses the features of five methods for determining the economic load rate of transformers, and finally suggests a method to choose the economic load rate of the distribuing transformers.

Abstract:The determination of structural parameters of hydraulic lock is interrelated to the speed ratio, the load sustained and its hydraulic working condition. In this paper, main problems and calculation method of matching operation are discussed with illustrating examples.

Abstract:Taking aecount of shear action between the piston truss the bottom plate, this paper assumes the bottom plate to be a part-ring and supposes that the shear distribution follows the power series law, making the problem to be a problem of mixed boundary condition of part plate. In the paper, the solution of this elastic plane problem is derived. The general expressions of radial displacement of bottom plate are given. The compatible conditions both at the nodes of the lower chord of the truss and at the central cylindrical shell are analyzed.

Abstract:本文对参数规划问题的目标映射F(x,u)为集值映射的情况进行了研究。着重讨论了解集映射的李普希兹连续性。得到了在集值映射Y(u)=F(X(u),u)(X(u)是约束集合)是局部李普希兹连续,只有y=0,z=0才满足约束品性。 (z,0)∈y· f(ū,■+N_E(ū,y)等条件下,解集映射N(u、v)是伪李普希兹连续的,以及在Y(u)是强序凸的,N(u)是下半连续等条件下,证明了解象映射是局部李普希兹连续的。本文还考虑了解集映射的序凸性。

Abstract:In this paper, a singular Cauchy problem iS studied. The unflat solutions for some singular Cauchy problem are obtained by Adomian's decomposition method.