General mechanic differences and methods of dynamic response analysis of RC structure characterized by abrupt change in horizontal connection stiffness are discussed.

Based on comparing the results of structure systems, the paper reach the conclusion that the sandwich rubber cushion effectively control displacement response of the additional stories structure, and the displacement of each storey are significantly decreased, especially the stiffness mutation of the directly storey-adding are relieved .

By attaching an auxiliary surface between the assembled parts, defining the material properties of the auxiliary surface and connecting the assembled parts with the Multi-Point Constraints(MPC) technique, the practical connecting stiffness of the assembly structure can be simulated .

Finite element analysis of stiffness of connection between steel beam and CFT column with stiffener ring plate;

According to Hook law, the displacement stiffness and rotation stiffness were gotten when spring plank was connected with swing bolsters, different connection stiffness values were obtained by changing spring plank radius.

were investigated and the influence law of the load on the coupling stiffness and the contact state of the spline joint structure were also investigated.

The paper introduced a method combined finite element analysis and field static test, made a security appraisal to a pin scaffold temporary stand, analyzed how the coupling stiffness between rail and upright stanchion affect the stability ultimate bearing capacity.