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Appraised
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Interface
of Data Check-up
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Interface
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Interface
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Other
Interfaces and Illustration
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GQJS(
Bridge Structure Design System abbreviated as GQJS according
to the Chinese phonetic alphabet )had been developed by the combined effort of many experts in the
Ministry of Communications. The predecessor
of GQJS is GQZJ (Bridge Synthesis Program abbreviated as
GQZJ according to the Chinese phonetic alphabet ).GQZJ had
been applied tentatively since 1978 and passed the technical
appraisal by the Chief Bureau of Highway of the Ministry of
Communications in 1980. During the last 20 years of spread and
application of the program in highway system, it was used
extensively and verified in the actual engineering with continuously modified
and perfected by many bridge experts. Now, we developed English
version of GQJS as BSDS (Bridge Structural Design System).
This
system is suitable for any bridge structure system which can
be simplified as a plane bars system, such as simple supported
beam bridge, Continuous bridge, continuous
beam bridge, continuous rigid frame bridge, continuous arch
bridge, truss structure, T - rigid frame bridge, cable-stayed bridge
and frame structure, etc. Bridge materials may be prestressed
concrete, reinforced concrete, concrete, steel, masonry and the
combination of the above materials. For different structural
members, users can select different materials. The structure
system can be formed by phases. Every phase has its own static
model. For the current construction method such as
cantilever-construction, push-out construction and temporary
support assembling construction, the system can comprehensively
analyze the structure system at construction phase and using
phase. The eccentric beam element with rigid arms on both sides
was adopted by the system, so the effect of nodal rigid domain
where the multiple poles meeting was considered.
The
calculating loads in the construction phase are as follows:
system adjustment (including the poles getting back work and
the replacement of support abutment during the push-out construction),
the stretching of prestressed bars, the disassembling of temporary
prestressed bars, structural weight, concentrated load, distributed
load, forced displacement, unloading the element, disengaging
work of unilateral forced pole, secondary internal force and
prestress loss due to the concrete shrinkage and creepage,
etc.
The
calculating loads at the phase of use are as follows: all the
static loads: concentrated load, distributed load, forced displacement,
temperature variation (including the friction load resulted
from the sliding of support abutment), and all the live loads:
the vehicle loads as automobile-15, automobile-20 and super
automobile-20, the automobile loads for urban bridges (Grade
A and B), any automobile group, the trailer load as trailer-80,
trailer-100, trailer-120, special vehicle load, full-bridge
crowd load, footpath crowd load.
The
calculation of the system includes: internal forces for each
phase, accumulative internal forces, normal stress, shear stress,
principal stress and their directions of six points along the
height of the section, stress of the prestressed bars after
stretching and anchorage, stretching elongation of the prestressed
bars, residual stress of the prestressed bars for each forcing
phase, section stress due to the nonlinear temperature field
along the height of section, section internal force, displacement,
stress and their combinations due to all kinds of loads at
use phase. All output results titled with Chinese specification
for reading and comprehension. The static calculation sketch,
the deflection graph and the stress envelope diagram for the
construction phases can be plotted according to the demands
of the users.
The
system has been used in the many design items such as: Nanping
Bridge in Fujian province(60m+95m+60m continuous rigid-frame
bridge), Rencungou Viaduct in Henan province(5×45m thrusting
continuous bridge), Shantou Bay Bridge in Guangdong province(444m
cable stayed bridge scheme), Luofushan Bridge in Guangdong
province(100m tied arch bridge), Luowei Bridge in Guangxi Autonomous
Region(80m+125m+80m continuous rigid-frame bridge), Yuanjiang
Bridge in Yunnan province(55m+182m+265m+194m+69m continuous
rigid-frame bridge) etc. It has been also used for the many
detection and retrofit items of the old bridges: The Third
Bridge on Qiantang River in Hangzhou(cable stayed bridge),
two steel truss bridges in Bingzhou and Pingyin, Shandong province,
and the double arch bridge in Chahe, Shandong province etc.
It got excellent effects and users' confirmation. The engineering
examples above list are only few parts of the actual approbation.
Bridges designed by using this system are too many to list
in details.
During
the exploitation of this software, the technology of dynamic
visualized interactive interface and intelligentized automatic
building of structure data is adopted. Under the 32-bit
Windows 95/NT operating system, the advanced and efficient
tools for the software exploiting—Fortran Power Station 4.0
and Visual Basic 5.0 are adopted.
In
the interactive interface of this system, file View,
data table and function buttons are equipped with a great deal
of dynamic pictures. The interfaces were active, visualized
and convenient for filling data. The data inputted are categorized
according to the bridge structure members and the loading condition.
Abundant help information in the interface is convenient for
different levels of users. Help information includes system
functions, applying method and the detailed explain for all
parts of input information. In conclusion, the system have
the virtues of friendly interface, simple data input and visual
and pellucid results output. Within the domain of bridge design,
this software is an available tool with strong functions and
advanced technology. |