This document discusses the design and use of a movable scaffolding system (MSS) for constructing a curved bridge with long spans and high piers. It introduces the objectives and components of MSS bridges, including the main grider, deck, and pier frame. There are two main types of MSS: overhead and underslung. Finite element analysis and field testing were performed on a new 1500 ton MSS designed to pass spans on the curved bridge. Test results validated the MSS design, allowing the bridge to be completed efficiently.

1. CONSTRUCTION
STAGE ANALYSIS OF
MSS BRIDGE
MAJOR PROJECT PHASE - I

2. CONTENT
 INTRODUCTION
 MIDAS
 OBJECTIVES OF MIDAS
 MSS BRIDGE
 COMPONENTS OF MSS BRIDGE
 TYPES OF MSS BRIDGE
 OVER HEAD MSS BRIDGE
 UNDER SLUNG MSS BRIDGE
 CONCLUSION

3. INTRODUCTION
A movable scaffolding system (MSS) can improve the automation of
bridge construction and therefore was widely used. However, for
bridges with small radius curves, there are many difficulties when
the huge MSS moving from one span to the next. In this paper, a
new huge MSS (around 1500 t) for passing span of a curved bridge
was designed and presented to complete the erection of the second
longest span rail transit cable-stayed bridge in in the world whose
north approach bridge features high piers, long spans, and a small
radius. Schemes for the MSS passing span of the curved bridge were
introduced. The finite element analysis (FEA) and field tests of the
MSS when passing span were carried out. The calculative and field
measured results were compared and analyzed. The comparisons
and analyses indicate that the small radius curve of the bridge and
uncertainties during the erection have great effect on field measured
stresses and displacements of the MSS. The bridge was competed
smoothly and efficiently using the MSS with consideration of the
calculations and filed measurements.

4. MIDAS
Midas Civil is a Bridge Design &
Analysis software that combines
powerful pre-and post-processing
features with an extremely fast
solver, which makes bridge
modeling and analysis simple,
quick, and effective. Also, there are
several easy parameter
modification tools available that
can be used for parametric analysis
leading to optimized and
economical design.

5. OBJECTIVES OF MIDAS
 Midas Civil enables us to readily create nodes and elements as if we were
drawing drawings using the major functions of CAD programs.
 Other modeling approaches such as CAD import, table format modeling,
and code format modeling are also available.
 Powerful automatic modeling functions such as Auto Mesh Generation
and various Bridge Wizards are introduced.
 To learn about the advance features in midas civil.

6. MOVABLE SCAFFOLDING
SYSTEM (MSS)
Movable Scaffolding System, better known
as MSS is a form-work system for cast-in-
place bridges. It has been widely used to
build bridges around the world. As its name
implies, apart from providing form-work for
the cast-in-place work, it has the ability to
move forward by itself. The moving forward
usually takes less than one day and this
included resetting of the form-work for the
next span. It is a major different when
comparing to the normal form-work system
which is supported by shoring all the way
from the ground.

7. COMPONENTS OF MSS BRIDGE
1. MAIN GRIDER
2. BRIDGE DECK
3. TRANSVERSAL STRUCTURE
4. FORM WORK
5. PIER FRAME
6. BRIDGE PIER

8. Generally, we have only 2 types of MSS,
categorized by the positioning of its main
support structure relative to the formwork
system or the bridge to be fabricated:
1. OVER HEAD MSS BRIDGE
2. UNDER SLUNG MSS BRIDGE
TYPES OF MSS BRIDGE

9. OVER HEAD MSS BRIDGE
Overhead MSS is very useful for building
cast-in-situ bridges with low pier or varies
type of pier. We supply steel formwork
alternately timber and plywood sheeting
formwork system can be used.
We supply mechanical formwork for
internal forming if the client needs it. We
also supply special solution for double
casting procedure on the Box Girder bridges
which save times, equipment investments
and labors. You are welcome to contact us
for detail.

10. UNDER SLUNG MSS BRIDGE
Underslung MSS has all the advantages
similar to its overhead model, except that
it gives additional users friendly feature
by providing a clear space above the
formwork. MSS-S Series Under-Slung
MSS is very useful when the bridge
designed with monotype of pier, which is
normally the case when the bridge is
crossing river.

11. CONCLUSION
 Now We have Concluded this Major Project Phase-Ⅰ Upto Methodology
Of Suspension bridge With Load Combinations.
 So We Looking forward to Completing the “CONSTRUCTION STAGE
ANALYSIS OF MSS BRIDGE” By using a completed stage and
Construction stage Analysis in Midas Civil Software.
 We look forward to the conclusion of bending moments and shear force
applications, and at each point within the element by analysis modeling of
the suspension bridge is derived from the output of the Midas software.

12. THANK YOU