| Summary: | 碩士 === 淡江大學 === 土木工程研究所 === 82 === The purpose of this paper is to investigate the dynamic
response of the externally prestressed concrete bridge due to
vehicle loads and discuss the discrepancy between the dynamic
and static analysis. A finite element model, including flat
facet shell elements, link elements, and tendon elements, is
used to model the concrete section, the key joints, and the
external tendons of the segmental bridge. The dynamic loading
is simulated by a HS20-44 truck moving along the bridge. The
Newmark .beta. scheme is used for the numerical analysis. The
example is a three-span bridge with external prestressing. The
variations of the displacements, prestressing forces, and the
crack widths due to different loadings are presented. The
cracking load and the ultimate strength of the bridge are also
discussed.
|
|---|
