This document discusses Mixte Design software for pre-design of composite road and railway bridges. The software allows users to easily define two-girder bridges, verify them for bending and fatigue, view results, create reports, and export bridges. It addresses the needs of both novice and experienced engineers with minimal data entry. Mixte Design is developed by Computer Control Systems S.A., which has extensive expertise in composite bridges.

1. With Mixte Design currently you can:
Ÿ Easily define a two-girder composite railway bridge using a wizard.
Ÿ Verify the bridge in bending and fatigue.
Ÿ View the verification results in comprehensive charts and tables.
Ÿ Create a pre-design report to document.
Ÿ Export the bridge to Mixte 2I and AnaDyn.
Ÿ Produce the loads for multi-girder bridges.
Mixte Design addresses both the starting and the experienced engineer’s needs for a reliable
and accurate pre-design tool with minimal data entry needs, that does not make any simplifying
assumptions that could reduce the quality of the construction.
Mixte Design is developed and owned by Computer Control Systems S.A. (CCS).
Mixte Design is the result of the high level of expertise and experience of CCS engineers in the
composite bridges domain. CCS software is being used by organizations such as the design
department of the French railways (SNCF), Design Offices, and Construction Companies such as
Eiffage Métal and Baudin Chateauneuf.
Software for
pre-design of composite
road and railway
bridges
at conception phase
Eurocodes
Computer Control Systems | 94-96 Kifissias Ave., 15125 Athens, Greece | +30 2108051730 | www.ccs.gr
Eurocodes:
Ÿ Eurocode 1 - Part 2
Ÿ Eurocode 3 - Parts 1-1, 1.5, 1.9, 2
Ÿ Eurocode 4 - Part 2
Built-up I section
with constant height
or with linear and parabolic taper.
Automatic generation
of section properties.
Detailed definition
of concreting schedule.
Account of slab cracking.
Automatic generation of traffic
and train loads for the design
of road or railway bridges
under service,
ultimate and fatigue limit states.
Analysis and Design with section
classification, stress redistribution,
checks in bending, shear,
bending-shear interaction,
fatigue, stress verifications, etc.
Superior solution for bridges

2. Superior software solutions for steel and composite structures
Hundreds of road and railway bridges
have been designed with Bridge software suite.
CCS has an extensive experience in
the field of composite road and
railway bridges, due to the
realization of many studies of
bridges and the development by a
highly skilled team, of computer
applications for solving specific
problems for bridges, according to
Eurocodes. This particular
specialization was acquired through
regular collaborations with French
national organizations such as SNCF,
CTICM and SETRA.
CCS has developed custom software
applications for SNCF such as: PACT
(analysis of the dynamic behavior of
a bridge when high velocity trains
pass over it), RaBPMx (analysis,
design and automatic drawing
production of composite railway
two-girder bridges) PIVOT
(calculation of interaction between
rail track and bridge under the
acceleration or deceleration of high
velocity trains).
Bridge Software Suite
Analysis and design
of composite road and railway
two-girder bridges
Eurocodes and French regulations
Analysis and design of composite
road and railway box bridges
Eurocodes
Pre-design of composite
road and railway bridges
at conception phase
Eurocodes
Dynamic and fatigue analysis
of railway bridges
Eurocodes
Expertise and Innovation
Verifications of composite
road and railway bridges
Eurocodes

3. Computer Control Systems | 94-96 Kifissias Ave., 15125 Athens, Greece | +30 2108051730 | www.ccs.gr
Software for the pre-design of composite
road and railway bridges at conception phase
UI features:
The workspace can be freely customized in
order for the user to define an environment
that meets his needs.
The user interface supporting multiple
languages, has all the characteristics of a
contemporary software.
Specifically:
Ÿ Dockable panels.
Ÿ Tabbed or multiple views.
Ÿ Pinnable panels.
Ÿ Message board.
Ÿ Location tools.
Evolution:
The software is designed to evolve. Wizards
for other types of section are planned.
Application of Eurocodes:
Ÿ Automatic creation of loading cases and
combinations in Service Limit Stage (SLS)
and Ultimate Limit Stage (ULS) (traffic
loads, shrinkage, partial safety factors, etc).
Ÿ Construction phases are taken into
account.
Ÿ Automatic calculation of the equivalent
factors in relation to the type and load or
the day of concreting.
Ÿ Automatic calculation of the effective
width.
Ÿ Design check of the composite section to
SLS and ULS.
Ÿ Taking account of concrete cracking and
stresses redistribution.
Ÿ Sections classification (calculation of the
reduced section characteristics for class 4).
Ÿ Fatigue verification for road and rail
bridges.
Input Wizard:
All the data required for the definition of a
two-girder bridge are given in a six-step
wizard.
Ÿ Spans.
Ÿ Transversal geometry.
Ÿ Sections.
Ÿ Diaphragms.
Ÿ Loads.
Ÿ Fatigue.
Multi-girder loads:
The user can define the number of main
girders and their positions as their geometric
characteristics and the load position. The final
distribution coefficients are calculated for the
applied load with one click.
Results:
Each girder’s results can be inspected
individually with graphs:
Ÿ Ratios in flexural verifications (moments,
stresses, etc) in the form of max and min
envelopes.
Ÿ Fatigue results for every part of the steel
sections in Δσ and Δτ criterion.
Reports:
The software creates a comprehensive and
attractive report in an editable format
document (Rich Text Format) in multiple
languages.

4. Computer Control Systems | 94-96 Kifissias Ave., 15125 Athens, Greece | +30 2108051730 | www.ccs.gr
Superior software solutions for steel and composite structures
Computer Control Systems | 94-96 Kifissias Ave., 15125 Athens, Greece | +30 2108051730 | www.ccs.gr
Computer Control Systems S.A. (CCS) was established in 1987 in Athens. Greece. Its initial legal form was Ltd and in 1992 it was
reformed to S.A. (shareholding company). Our main business is the production of software and the provision of services. The
extensive expertise in the sectors we operate, combined with highly skilled scientific and technical personnel and consistent after-
sales support, ensure customer satisfaction and long-term collaboration.
CCS has a strong commitment for quality in the design, development and support of its products and is certified with ISO 9001 since
1999 for “Design / Development Installation and support of Information Technology products and solutions and elaboration of
applied mechanics studies”.
The Engineering Division of CCS is unique for its commitment in serving the steel industry and has gained an excellent reputation
for the high level of expertise, the innovation in software, and the quality of services and engineering studies. Hundreds of structural
engineers, design offices, contractors, steel suppliers and fabricators have chosen to rely on our services in order to achieve superior
productivity and competitiveness.