# STRUCTURAL DESIGN 1 - 2020/1

Module code: ENG1076

## Module Overview

This module aims to introduce students to the basic principles of structural analysis and design by building on the knowledge gained in semester 1. It consists of two components: (1) Stress Analysis, which extends the work in stress analysis from uni-axial to multi-axial conditions; (2) Structural Design, which introduces the limit state approach to the design of simple elements under tension, compression and bending, together with an overview of the types of loading acting on structures and their idealisation for design purposes.

### Module provider

Civil and Environmental Engineering

CHRYSSANTHOPOULOS Marios (Civl Env Eng)

### Module cap (Maximum number of students): N/A

Independent Learning Hours: 101

Lecture Hours: 32

Tutorial Hours: 11

Laboratory Hours: 6

Semester 2

## Prerequisites / Co-requisites

Normal entry requirements for the degree programme in Civil Engineering.

## Module content

Stress Analysis:

Stress transformation of two-dimensional stress-states

Principal stresses

Strain and strain gauges

Strain transformation and principal strains

Multi-axial stress-strain relationship

Poisson’s ratio and generalised Hooke’s Law, relationship between E, G and n.

Introduction to failure criteria according to Rankine, Tresca, von Mises and Mohr-Coulomb

Structural Design:

Main causes of structural failure; risk in structural engineering in the context of the ‘process-product-people’ concept;

The process of structural design;

Types of loads acting on structures: permanent, variable and accidental; direct and indirect; Idealisation of structures for design purposes;

The design philosophy in codified design methods, principally the limit state approach;

The specification of load cases and the basis for partial safety factors in codes of practice;

Design of simple bending, tension and compression elements in steel using simplified versions of the clauses and criteria found in design codes.

Principles of stress analysis will be reinforced by practical applications in the laboratory.

## Assessment pattern

Assessment type Unit of assessment Weighting
Examination EXAMINATION, 2 HOURS 60
Coursework LABORATORY REPORTS AND STRESS ANALYSIS ASSIGNMENT 20
Coursework STRUCTURAL DESIGN COURSEWORK 20

## Alternative Assessment

Alternative assessments for laboratory reports will be coursework assignments.

## Assessment Strategy

The assessment strategy is designed to provide students with the opportunity to demonstrate

• Apply the principles of structural mechanics to the stress analysis of 1D and 2D problems (LO’s 1 and 7)

• Idealise simple structural forms and design their principal elements (LO’s 2-6)

• Present a technical report and engineering calculations with appropriate use of data and presentation of data in tables and graphically (LO’s a-g – design coursework and laboratory reports)

Thus, the summative assessment for this module consists of:

• Examination [LO’s: 1-6] {2 hours, 60%}

• Structural Design Coursework [LO’s: 2-6, a-g] {30 hours, 20%}

• 2 laboratory reports [LO’s: 1, 3 and 7, a-h] {18 hours, 10%, Reports weighted 25:75}

• Stress Analysis 4 x Online Tests (using SurreyLearn)  [LO’s: 1, a-b and g] {18 hours, 10%}

Formative assessment and feedback

Formative assessment and feedback is provided via the weekly supported tutorial work  (11 hours) and through self-assessment exercises provided via SurreyLearn.  The students complete a set of worked solutions to a range of questions in the tutorial classes and are provided with tutor support in comment and feedback in the sessions.

## Module aims

• To develop an understanding of the elastic response of solid components to externally applied loads, including multi-axial stresses and strains
• To derive multi-axial stress-strain relationships and associated elastic constants
• To understand the basis of structural design and the principles of the limit state approach.
• To introduce load distribution and the identification of load paths in structures.
• To explain the use of partial safety factors in determining design loads and resistances
• To design simple members in steel under tension, compression and bending loads.
• To present the types of loading acting on structures and their uncertainties

## Learning outcomes

 Attributes Developed 001 Analyse simple components under multi-axial stress states by using a combination of stress analysis and an appropriate failure criterion KCPT 002 Idealise simple structures and the loads acting on them KCPT 003 Specify appropriate load cases for simple structures KCPT 004 Identify the principal elements in such structures and determine the loads to which they should be designed KCPT 005 Design the principal elements using the limit state approach KCPT 006 Iterate and improve on a design solution KCPT 007 Conduct laboratory tests to determine actions in simple structural elements (such as a tie, beam and/or strut) and understand the hazards and risks in the laboratory. KCPT 008 Synthesis of data T 009 Graphical presentation of data T 010 3D spatial awareness T 011 Use of word processor, spreadsheet, drawing/presentation T 012 Technical report writing T 013 Independent learning skills T 014 Reviewing, assessing, and critical thinking skills T

Attributes Developed

C - Cognitive/analytical

K - Subject knowledge

T - Transferable skills

P - Professional/Practical skills

## Methods of Teaching / Learning

Learning and teaching strategy:

The module introduces the basis for structural design leading to topics in Structural Engineering at FHEQ Level 5, 6 and 7 on the MEng and BEng programmes in Civil Engineering.  It also provides for the further study in structural mechanics to 2D stress states and basic stress analysis – the uniaxial state and basics were initial introduced in the Statics part of ENG1063 in semester 1.   In particular the module provides the backround for the application of design principles as part of the Integated Design 1 (ENG1077).

Learning and teaching methods:

The module is delivered by weekly lectures and supported by tutorial classes (smaller groups) in the two main components:

• Mechanics lectures (10 hours) and tutorials (5 hours)

• Mechanics laboratory (6 hours)

• Structural Design lectures ( 22 hours) and tutorials (6 hours)

Indicated Lecture Hours (which may also include seminars, tutorials, workshops and other contact time) are approximate and may include in-class tests where one or more of these are an assessment on the module. In-class tests are scheduled/organised separately to taught content and will be published on to student personal timetables, where they apply to taken modules, as soon as they are finalised by central administration. This will usually be after the initial publication of the teaching timetable for the relevant semester.