Application of Spatial Structures in Bridges Deck
Abstract: Spatial structure is
a truss-like, lightweight and rigid structure with a regular geometric form.
Usually from these structures is used in covering of long-span roofs. But these
structures due to the lightness, ease and expedite of implementation are a
suitable replacement for bridge deck. However steel and concrete is commonly
used to build bridge deck, but heavy weight of steel and concrete decks and
impossibility of making them as long-span bridge deck is caused engineers to
thinks about new material that besides lightness and ease of implementation,
provide an acceptable resistance against applied loads including both dead load
and dynamic load caused by the passage of motor vehicles. Therefore, the
purpose of this paper is design and analysis bridge deck that’s made of
double-layer spatial frames compared with steel and concrete deck. Then
allowable deflections due to dead and live loads, weight of bridge in any model
and also economic and environmental aspects of this idea is checked. As a
result, it can be said that the use of spatial structures in bridge deck is
lead to build bridge with long spans, reducing the material and consequently
reducing the structural weight and economic savings. For geometric shape of the
spatial structure bridge is used of Formian 2.0 software and for analysis of
bridges is used of SAP2000 with finite element method (FEM).
Keywords: Spatial Structures,
Bridge Deck, Steel and Concrete Deck, Finite Element Method, Deflection
Author: Mohammad Hossein
Taghizadeh, Alaeddin Behravesh
Journal Code: jptsipilgg150031
