Holabird & Root LLC
The Rhythm City Skybridge is a pedestrian bridge
that connects downtown Davenport, Iowa, to the
edge of the Mississippi River. The structure spans
575 feet over a parking garage, highway, and
heavily used railroad tracks as part of
Davenport’s “River Renaissance” redevelopment
project. Designed to help revitalize downtown
Davenport, the skybridge is a distinctive, cable-stayed bridge with splayed 99-foot columns. It
connects a downtown courtyard and parking
facility to a park along the Mississippi riverfront.
The angled glass walls reduce solar glare and the
heating loads within the bridge while allowing
unobstructed views to the surrounding city.
Holabird & Root used RAM software for the structural analysis and design of the skybridge. The
basic model could be easily modified to change
bays or spans, change load criteria, change
members, and investigate alternative solutions.
The 3D model made the structure easier to visual-
ize and compare with the architecture drawings.
It also allowed viewing of the behavior of the
structure and its movement under a number of dif-
ferent loading conditions. The analysis included
gravity loads, wind loads, seismic loads, and the
effects of thermal loads since the bridge structure
has no expansion joints. ;
BIM FOR BUILDING ENGINEERING
Reconstruction of Lithuanian Museum of Ethno-Cosmology
Joint Stock Company Ekoprojektas
The reconstruction of the Astronomic Pavilion building of the Lithuanian Museum of Ethno Cosmology
included a new viewing platform and telescope,
an additional evacuation staircase, and administrative offices. The existing building comprises two
steel towers 33 meters high, interconnected on
top by a spatial steel truss structure used as the
viewing platform. The offices will be on a three-story upturned irregular frustum to be constructed
from cast reinforced concrete connected to the
existing towers on all overlapping levels.
acteristic impact load variants, and 24 swaying
forms ( 12 for each plane) were analyzed. The
model (consisting of rod and planar elements),
was calculated in elastic stage on the first sway-
ing form basis without taking into account the
geometric nonlinearity. The effect of the elevator
well and staircase on the building rigidity was not
taken into account.
The project did not seek economy of money or time,
only the reliability and safety of the structure. ;
Calculation of the spatial structure was performed
to determine the main steel and reinforced concrete bearing structures for the technical design.
Finite element analysis with STAAD.Pro 2004 SE
was used for static calculations of the structures.
The analysis included 19 calculating and 19 char-