The mechanical response of pavement layers on the orthotropic steel deck under wheel loading is analyzed by finite element method,based on liner elastic theory and layer theory. The distribution and numerical value of the draught stress and the main shear stress on layers are determined in the file.

According to Elastic Theory, developed "Orthotropic Contact Model"betwien RCC slab and subgrade of the RCC+AC(roller compacted concrete and asphalt concrete) composite pavement.

These methods complement each other and have become primary means in calculation of settlement of groundsill However, in the typical calculation of the settlement of foundation, additional stress incurring by loading is calculated according to elastic theory which has the same characteristics in semi-infinite space, the condensation of soil is decided by the condensation experiment of one-dimension and the settlement is calculated by adding results of respective layers.

The assumption of Winkler foundation beam and semi-infinite elastic theory are used for calculating the internal forces of anchor frame beams. The internal force distributions of different length beams are analyzed.

The results show that it is illogical to design the frame beam just by expansive force. It is suggested that the internal forces of anchor frame beam to be calculated with Winkler foundation beam and semi-infinite elastic theory. At the same time the pertinent proposal for designing frame beam is offered based on an actual project.

This paper analyses local load on railway steel plate giders in the action of wheel pressures with finite element method and then studied the influence of local load on the ultimate state of steel plate girders according to elastic theory, and offers proposals for the design of railway steel plate girders.

The main reason for the above results is as following. The Q-system considers the high field stress by introducing σ-θ/σ-c,σ-θ is the maximum tangential stress(estimated from elastic theory),and σ-c the uniaxial compression strength(MPa).

On the other hand, applying elastic theory and ANSYS program transient analysis, three-dimensional space theoretical model is established to work out dynamic stress of subgrade soil, Incorporating the relation of plastic deformation and stress learning from laboratory, in the end, the accumulated residual deformation is calculated.

Secondly, the mechanical respond of a typical asphalt pavement structure under heavy load was analyzed according to multilayer system elastic theory and characteristics of heavy loads, and analysis method of ultimate bearing capacity of asphalt pavements was advanced.

An analytical approach to calculate time-dependent forces and stresses in concrete arch ribs with stiffen framework is developed in this paper by using eightnode plane isoparametric element, The method of calculation of creep-shrinkage of the ribs cast by ringgs and the restraint effect of the stiffen framework on the creep and shrinkage are studied in detail and the results of which are compared with results from elastic theory.

The aim is to assess the interaction forces among the perfectly bonded layers, through a consistent application of the classical nonlinear magneto-elastic theory.

In this paper, we apply the elastic theory of dislocation to clarify the controversy.

The accumulation of strain and stress on the fault can be predicted using elastic theory.

Lubrication theory is applied to compute the deformation of two approaching particles suspended in a Generalized Newtonian fluid with linear elastic theory estimating deformation and force on the particles with respect to deformability δ.

Finally, the sample curvature has been evaluated from the broadening of the substrate Bragg peak and, when the broadening was sufficiently large, a good agreement with that calculated from the elastic theory has been found.

This Paper describes several instruments made by the writers used for the measurement of the mechanistic parameters of pavement,The instrumentation and testing technigue for static and dynamic loading tests in pavement testing tank are discussed.Test verifications for the stresses and strains in pavement under the action of single and twin circular loading plate and static and slow- moving dynamic duel tire truck loads are also performed.The results of the test are compared with the values obtained by elastic...

This Paper describes several instruments made by the writers used for the measurement of the mechanistic parameters of pavement,The instrumentation and testing technigue for static and dynamic loading tests in pavement testing tank are discussed.Test verifications for the stresses and strains in pavement under the action of single and twin circular loading plate and static and slow- moving dynamic duel tire truck loads are also performed.The results of the test are compared with the values obtained by elastic theory of layered systems and finite element method.The fundamental law of the change of stresses in the subgrade and of strains in the pavement with the variation of leads and structural parameters of the pavement is studied.The data obtained might provide a scientific basis for the working out of a new specification for the structural design of flexible pavement.

Two current methods used in China for the computation of embedded pile are briefly analysed in this paper. There are a variety of opinions on the use of "Foundation Reaction Coefficient Method" based on elastic theory for solving the resisting force of piles in sliding mass directly,and meanwhile, an elastoplastic composite solution with boundary condition of ultimate equilibrium state of stress in the soil mass overlying the sliding plane,i.e.the"Equivalent Foundation Coefficient Method" is proposed.In...

Two current methods used in China for the computation of embedded pile are briefly analysed in this paper. There are a variety of opinions on the use of "Foundation Reaction Coefficient Method" based on elastic theory for solving the resisting force of piles in sliding mass directly,and meanwhile, an elastoplastic composite solution with boundary condition of ultimate equilibrium state of stress in the soil mass overlying the sliding plane,i.e.the"Equivalent Foundation Coefficient Method" is proposed.In addition, it is tried, in this paper, to find out the design load acting on the piles by analysing the interaction between piles and the sliding mass and to demonstrate the force transmission behavior of the soil mass between piles and thus to solve the problem of determining the spacing of piles.However, as indicated in this paper, the load condition of pile is rather complex, especially the interaction between the pile and the sliding mass can hardly be got clear, so far the above-mentioned idea is erely an attempt in theoretical work and needs to be verified by experiments.

Basing on the elastic theory in this paper the formulas to calculate the internal force of two-span and tri-span continuous plate bridges under wheel load are derived respectively, and the concrete calculation according to the current national design load standard with two-width bridge is made. This calculation indicated that some specifice-tims in the current norm[1] are still applicable for continuous plate bridge. They are simple and convenient, if only the correction factor is taken into account.