During welding process to make joints, residual stress is inevitably produced and weld
metal should be used. These influence the static and dynamic behavior of steel structures with welded
joints, such as steel piles. In steel structures, dynamic mechanical behavior is different to static
mechanical behavior. Therefore, to accurately predict the behavior of steel piles with a welded joint
under static-dynamic loading, the research on influence of a welded joint on the static and dynamic
behavior of steel piles is necessary. For that purpose, a rate-dependent plasticity model was used,
considering strain rate hardening and temperature rise.
In this paper, the distribution of welding residual stress in a welded joint was computed by using
three-dimensional heat conduction analysis and three-dimensional thermal elastic-plastic analysis.
The behavior of steel piles with a welded joint under axial static and dynamic loading was
investigated by using three-dimensional elastic-plastic finite element analysis, which employed a
rate-dependent plasticity model and included residual stress and mechanical properties of weld metal
in a welded joint. The rate-dependent plasticity model used in this paper is proposed by the authors
based on the static-dynamic loading tests. Numerical analysis results of steel piles with a welded joint
were compared to those without a welded joint. In comparison, the characteristics of static and
dynamic behavior of steel piles with a welded joint were investigated.
A Rate Dependent Plasticity Model under Cyclic Loading of Metals
