Super-Detailed Fem Simulations for Full Scale Steel Structure Caused Fatal Rupture at Its Joint Parts Between Members

Abstract

There have been some researches on analysis using finely-meshed FE model to understand in detail the behaviors of buildings during severe earthquakes. The accuracy of such analysis is often validated by comparing the results to the corresponding full-scale shaking table test. While they are highly successful in the accuracy, no researches take account of the effect of fracture of members. In this paper, numerical analysis is conducted for a steel structure subjected to multiple series of excitations in a full-scale shaking table test considering the fracture. The structure is modeled with planar and solid finite elements and the fracture is treated by mandatory deletion of elements at time when fracture was observed in the experiment. It is shown that, by considering fracture of steel members with deletion of elements the history of input excitations and caused damages, the behaviors can be simulated by analysis with much higher accuracy.

Implicit finite element analysis of ductile fracture of a steel frame under cyclic deformation

“…Analysis is first carried out by assigning forced displacement at node C computed from the target loading angle pattern in Figure 14, i.e., 0.0164, 0.0286, and 0.0428 rad for 2θ P , 4θ P , and 6θ P , respectively, neglecting the rotation of the connection. Then, the rotation angle of beam is computed using Equation (7), and the difference between the target and computed values is added at each load reversal point to trace the target angle pattern more accurately.…”

“…Recently, finite element (FE) analysis has been applied to simulate ductile fracture of steel frames. 5,6 Mizushima et al 7 predicted initiation of fracture at the beam-to-column joint of a three-story steel frame subjected to seismic excitation using an explicit time integration method. Wang et al 8 carried out FEanalysis for predicting ductile fracture at the joint.…”