In 1992, academician Zheng Jielian published a method that uses the oblique cable to hang arch ribs
during construction adopting jack control technology and continuously poured concrete arch rib
We were able to find a location for those inside the arch rib
itself so that they wouldn't be seen."
Since the modeling error mainly lies in the stiffness of arch ribs
, so we defined the [+ or -] 50% change of the stiffness coefficient of each arch rib
in order to build a big enough feasible region for the optimization of FEM updating.
* Each arch rib
is made up of 56 cast-in-place sections with construction starting from the canyon walls and a closure pour that locks the two halves together.
Both the arch rib
and tension tie-beam are box sections.
The arch rib
is a concrete-filled steel tubular structure, which is designed as a dumbbell-shaped section with equal height, and the section height is 2.8 m.
The arch rib
segments and the rest of the superstructure consist of precast high strength/high performance concrete.
Wan, Study on Mechanical Properties of concrete filled Steel Tube Arch Rib
joints with PBL Dumbbell, Chang'an University, Xi'an, China, 2012.
The longitudinal walls atop each arch rib
required about 210 cu yd.