overview of the handbook for the design of modular...

Overview of the Handbook for the Design of Modular Structures Anthony Sertorio, Engineering Manager Multiplex Engineering Innovations Group

TECHNICAL HANDBOOK COUNCIL 2016

Modular Construction Codes Board Context

• Introduction • The Handbook • Research & Testing • Case Studies

- SPEC Modular Building System - EEPT - Perth Stadium

• Our Mission

© Council on Tall Buildings

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Supply Chain Partners (Tier 2)

Supporting Partners (Tier 3)

Principal Partners (Tier 1)


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• Our Mission


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The Handbook for the Design of Modular Structures The Need for a Handbook

Modular Construction – Lack of design standards – Viewed as an adverse risk by financial institutions & developers

The Model Code will – Formalise guidelines for good practice – Improve safety and design practice – Reduce risk for investors – Allow better quality control – Improve outcome for all stakeholders – Promote communication


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The Handbook for the Design of Modular Structures Considerations

- Transportation & temporary state – Road – Rail – Ship

- Robustness of structure - Progressive collapse - Differential axial shortening - Reliability analysis - Design by testing - Services (Light on)


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• Our Mission


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Research & Testing Durability

- Degradation of products by: – Corrosion – Fatigue – UV – Built environment

- Fatigue testing - Manufacturer’s specification - Need for appropriate maintenance regime © Council on Tall B

uildings

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Research & Testing Transportation and On-Site Handling

- General guidelines for storage - Transportation considerations - Consideration for lifting and connection on-site - Inspections


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Research & Testing Other Considerations

- Simplified guidance for low-rise residential buildings - Disassembly and Recyclability

– Demolition/Recycling (part/whole of modular structures

- Relocatable Modular Structures – Demolition/Recycling


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Research & Testing Monash University PhD Project #01


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Research & Testing Comparison of Live Experiments and FEA – Monash University PhD Project #02


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Research & Testing Comparison of Live Experiments and FEA – Monash University PhD Project #02

Yielded

Weld fracture


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Research & Testing Progressive Collapse

Codified Provisions for Progressive Collapse - Australian Standards give limited guidance - US codes are better - Eurocodes are best - Damage can be

Accidental or Malicious

- Model Code Considers progressive collapse in detail Is adopting World’s Best Practice

Source: Ronan Points, London, UK (Griffiths et al. 1968)


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Research & Testing Progressive Collapse - Monash University PhD Project #03

- Column size = 300 x 200 x 6 - No collapse

- Column size = 200 x 100 x 6 - Progressive collapse!


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MULTIPLEX ENGINEERING INNOVATIONS GROUP

What is DfMA Introduction

Design for Manufacture & Assembly (DfMA) is a Design Process - Product is DESIGNED for ease of MANUFACTURE


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• Our Mission


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Elliptical Energy Pathway Theorem Introduction

An inverted pendulum is an inherently unstable system with a centre of mass above its pivot point.


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Elliptical Energy Pathway Theorem As the Human Body

The human body is an example of an inverted pendulum, e.g. walking is just the act of repeatedly catching a falling inverted pendulum.


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Elliptical Energy Pathway Theorem As a Control Problem

It is a classic problem of control theory to balance an inverted pendulum above a movable cart.

EEPT


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Elliptical Energy Pathway Theorem As a Control Problem

It is a classic problem of control theory to balance an inverted pendulum above a movable cart.


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EEPT

Elliptical Energy Pathway Theorem And a Restoring Force

Consider an inverted pendulum attached to a flex joint which acts as a spring to try to keep the pendulum upright.


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EEPT

Elliptical Energy Pathway Theorem As a Harmonic Oscillator


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Elliptical Energy Pathway Theorem As a Harmonic Oscillator


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Elliptical Energy Pathway Theorem In a Stiff System

This is a crude model for stiff structure anchored into the ground when actuated by e.g. wind or earthquakes.

EEPT


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Elliptical Energy Pathway Theorem In Nature

Nature does not build stiff structures like this! Nature has learned to not compete with actuating forces, but rather to cooperate with them.

EEPT


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Elliptical Energy Pathway Theorem Let’s Challenge Paradigms

Rather than using mass to compete against actuations in our buildings, why don’t we try to cooperate with them?

EEPT


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Elliptical Energy Pathway Theorem Inverted Double Pendulum

Consider now an inverted double pendulum with flex joints.

EEPT


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Elliptical Energy Pathway Theorem The Mathematics

EEPT


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EEPT

Elliptical Energy Pathway Theorem Double Inverted Pendulum

An inverted double pendulum distributes energy throughout the structure when actuated.

(Note: no damping is included in these simulations).


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EEPT

Elliptical Energy Pathway Theorem Inverted N-Pendulum

Similarly, an inverted N-pendulum distributes, even conducts, energy throughout the structure when actuated.


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Elliptical Energy Pathway Theorem Energy Pathway in Australia 108

EEPT


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• Our Mission


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Perth Stadium Design Brief

Multiplex engaged its own internal engineering innovations group in an effort to bring some economic benefits to the new Perth Stadium roof structure.


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Perth Stadium Design Brief

The brief outlined to our group, was to simplify the design and make it safer and easier to build.


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Perth Stadium Connection Dimension Overview


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Perth Stadium Structural Elements Breakdown

Truss Support

Pin Fastener

Fork Plate

M36 Threaded Fastener Tapped Plate/Captive Nut

Fin Locators

Hinge Pin © Council on Tall B

uildings

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Perth Stadium Forestay Column with Fork Top


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Perth Stadium Truss Support Member Install


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Perth Stadium Connection Pin Insertion


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Perth Stadium Connection Pin Insertion

Pin fastener plates fastened with M36 threaded rod


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Perth Stadium Final Connection Design & Validation


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Perth Stadium Final Connection Design & Validation

• Strut in compression (1600kN)

• Preliminary elastic modelling only shows minor local stress concentrations

• Stress concentrations will reduce using non-linear inelastic analysis


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Perth Stadium Fabrication & Erection


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Perth Stadium Project Outcome


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• Our Mission


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The Handbook aims to be: - Best code of practice in the world - Different (revolutionary) - Less Intimidating - Interactive

– Easy to read – Easy to use

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uildings

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