Session1-Rail Structure Interaction

midas Civil Applications for Metro Projects METRO DESIGN & PRACTICE

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Bridging Your Innovations to Realities

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Metro Webinar Series Contents

Introduction to MIDAS

Mass Transportation Systems

Metro Transportation Systems

Balanced Cantilever Method

Integral Bridge

Rail Structure Interaction

Tunneling

Project Applications

Upcoming Webinars

Summary


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Engineering

Consultancy

Bridge & Civil Structures

Building/Plants Structures

Geotechnical Analysis

Mechanical Analysis

Bridges

Buildings

Geotechnical

Mechanical

Software

Development

MIDAS About MIDAS IT


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MIDAS Introduction Total Engineering Solutions

Integrated Design System

for Building and General Structures

midas Gen

midas Design+

Building Eng.

2D / 3D Geotechnical and Tunnel analysis System midas GTS NX

Soil Works

Geotechnical Eng.

midas Civil

midas FEA

Bridge Eng.

Integrated Solution System

for Bridge and Civil Structures

Advanced Nonlinear and Detail Analysis System

MIDAS Information Technology Co., Ltd. 6

Integrated Solution System for Bridge and Civil Engineering midas Civil

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A Companies MIDAS Provides the best solutions in

Structural, Geotechnical, and Mechanical Engineering

ACKG Halcrow MWH Global

AECOM HDR Nikken Sekkei Group

ARCADIS HNTB Pacific Consultants

ARUP Hyder Parsons

Atkins Hyundai Engineering Parsons Brinckerhoff

Beca Group INGEROP PBS&J

Bechtel Italferr SpA Ramboll Gruppen

Black & Veatch Jacobs RMJM

CH2M HILL JGC Corp. Royal Haskoning

China Railway Construction

Corp. Kajima Corp. Scott Wilson

COWI Korea Power Engineering Shanghai Xian Dai

Design

CTCI Corp. Langan Sinopec Engineering

CTI Engineering Louis Berger Group SMEC

Dar Al-Handasah Consultants Michael Baker Corp. SNC-Lavalin International

DHV Group MMM Group URS

GHD Mott MacDonald WSP Group

Golder Associates Mouchel Yachiyo Engineering

Key Clients of MIDAS Software Solutions MIDAS Provides the best solutions in Structural, Geotechnical, and Mechanical Engineering

AECOM

AFCONS

Jacobs-CES

COWI

CH2M HILL

FEEDBACK VENTURE

Gammon

L&T LTD

L&T ECC

L&T Rambol

Louis Berger

Mott Mac

RITES

RDSO

SN Bhohe

STUP

Tandon Consultants

Distributed India Leaders A partial list of International Users


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Mass Transportation System Why do we need Mass Transportation System?

Why Mass Transport Systems?

1. Growth of population Increased Traffic

2. Inadequate Public Transport Poor traffic Management and inadequate Public Transport

3. Increasing Personalized Transport

Basic Inability of Public Transport to meet needs

Increasing Incomes, vehicle ownership

4. Effects Reduced Access, Congestion, Pollution


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Solutions

1. Metros

2. Monorail

3. Tram

4. Bus Rapid Transit System (BRTS)

5. Local Railway Transportation (LRTS)

Mass Transportation System Types of Mass Transportation Systems


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Metro Why do we need Metros ?

1. Fuel Economy Requires 1/5th energy per passenger per km compared to road-based system.

2. Reduced Road Stress Lesser Road Traffic and Lesser Accidents

No road space, if underground and only about 2 meters width of the road, if elevated

capacity system.

3. Pollution Free Zero Emission

4. Increased Mobility Easy and better accessibility to facilities in the influence and remote areas

Increased opportunities in the economic and business sectors

Metro Advantages


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Metro Difficulties faced in Metro Construction

1. Difficult to construct Bridges or Tunnels in locations with dense population.

2. Noise and duration of construction may stall the traffic more during the period of construction.

3. Metros/ Monorails use Continuous Welded Rails, which have their own advantages and disadvantages

Challenges for Metro Rail Design Engineers


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Metro Construction Solutions

1. Segmental Bridge Construction (midas Civil) Balanced Cantilever Method of Construction

Cast-in-Situ Segments

Precast Segments

Integral Bridge Method of Construction (monorail)

2. Rail Structure Interaction (midas Civil) Continuous Welded Rails

3. Tunneling (midas GTS) Tunnel Boring Machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.

They can bore through anything from hard rock to sand.

Solutions Construction Procedures


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Metro Balanced Cantilever Method


1. Balanced cantilever construction implies construction of cantilever segments from a pier in a balanced fashion on each side until the mid span is reached and a closure known as stitch segment is made with other half span cantilever constructed from the preceding pier.

2. The procedure is as follows:

The form work is suspended from the end of the last segment.

The new segment is cast and once the concrete has developed a predetermined strength, the section is post tensioned to the rest of the bridge.

The same erection process is repeated till the structure is completed.


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Stitch Segment

End Span PSC Segments


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Advantages

1. Less Space Required

Construction in urban area where temporary shoring would disrupt traffic services below.

2. Less Formwork Required

3. Larger Spans

Useful where span length is more but launching of girder is not possible.

4. More efficient, safe and economical

Easy adoptability to curvature and super elevation.

Useful for odd sizes, single span etc.


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Construction over a working flyover


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Construction over Railway lines


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Suitable for Longer Spans


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Considerations for a Bridge Engineer

1. Camber Due to cantilever action there will be some deformations, due to which, some construction defects may arise, specially when installing the stitch segment

2. Prestress Losses

3. Creep and Shrinkage Effect

4. Proper Construction Sequences


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Metro Balanced Cantilever Method in midas Civil

Bridge Wizard

Bridge Layout

Section Definition

Tendon Arrangement

Automatic generation

of Construction Stages

Prestress Losses

Camber Calculations

Bridge Layout Tapered Sections Tendons

Specialization


One Stop Solution for

Segmental Bridge

Tendon Prestess Loss

FCM Camber

Specialization

Construction

Stage Analysis

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Metro Construction Stage Analysis


One Stop Solution for

Segmental Bridge

Tendon Prestess Loss

FCM Camber

Specialization

Construction

Stage Analysis

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Metro Construction Stage Analysis

FCM Camber


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Metro Rail Structure Interaction

Definition of Continuous Welded Rail (CWR) Rails are continuously welded and thus, the length of one rail is longer than 200m. ex > standard length rail (L=25m), longer rail (L=25~200m)

Necessity of Continuous Welded Rail

1. Reduced Impact Force in the rails increases the life span of the rails and improves the ride quality.

2. Decreasing noise and vibration by the reduced impact force is less impeding the ambient environment.

Continuous Welded Rails - Advantages

Session1-Rail Structure Interaction

Documents

Transcript of Session1-Rail Structure Interaction