Statics and Kinematics in Cyclic Behaviour of Semi-Rigid Steel Structures

Abstract

The contribution presents a set of seismic analyses of multi - storey steel structures with semi-rigid beam column connections acted upon by seismic actions. Semi-rigidity of the structures beam to column connections is conferred by two types of beam to column connections: top and seat and web angle (TSW) and end-plate (EP) joints. Computed numerical results are associated to two classes (static and kinematic) of seismic behaviour parameters expressing the two contradictory effects of semi-rigidity. On one hand, the lateral flexibility induces larger lateral displacements while, on the other hand, it attracts smaller base shear seismic forces. Also, the constitutive relation M − θr induced into semi- rigid beam column connections by seismic actions is presented. The results are presented in their numerical form and in a comparative graphical manner allowing for relevant comments and conclusions

Location of semi-rigid connections effect on the seismic performance of steel frame structures

“…The results indicated that in the semi-rigid connection cases, the beam's end-moments decrease, and the column's end moments increase compared with the rigid connection cases. Ana [10] investigated the behavior of semi-rigid connections in 4-and 6stories steel structures under seismic loads. These frames are designed according to Romanian design codes.…”