Adopting the method of equivalent space framework for calculating the mushroom floor structure and abolishing some calculation assumptions of manual computation,may fully utilize the present calculation measures,avoid combination of internal forces which needs too much labor resources,so that the calculation is simplified.

The principle and application condition of equivalent frame model for shear wall are discussed in this paper.

The equivalent frame method is the most common method for flat\|plate structures, and how to compute the equivalent frame width coefficient is one of core questions of the method.

In order to study the equivalent frame calculation modes for hollow slab-column structures of reinforced concrete under lateral load,this paper conducts an elasticity analysis of such structures with edge beams of different dimensions by using a finite element structural program,and establishes their models accordingly.

New tangent stiffness matrix for geometrically nonlinear analysis of space frames;

Stiffness analysis for concrete－filled steel tubular space frames;

Based on the analysis of a space elasticplastic timehistory procedure EPDA,the aseismatic behavior of a space frame structure in high earthquake intensity zone under seldom occurred earthquake is studied with timehistory analysis method.

A new design method which can be applied to the built up arch structure with RC piles for deep excavation is presented,which is executed by the analysis of space frame.

The computation analyses are shown by two practical examples that the computation errors will be greater when the space frame foundations under the action of Turbodynamos and electromotor are simplified to plane frame founations.