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Structural Engineering

Blast and Impact Resistant Structures

An original, experiment-led course on extreme-event mechanics, impact, blast loading, structural response, failure, and resilient design.

Advanced7 chapter available

Learning path

Chapters

01

Thinking Clearly About Extreme Events

Build a risk-informed foundation for rare, rapid actions and decide when dynamic behaviour matters.

  1. Why Extreme Events Are Different

    Compare ordinary design actions with short-duration, high-consequence loading and establish a responsible analysis workflow.

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  2. From Scenario to Performance Decision

    Connect the initiating event, structural load, response, damage, consequence, and performance objective.

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  3. Time Scale Changes the Problem

    Use load duration and structural period to distinguish impulsive, dynamic, and quasi-static behaviour.

    Planned
  4. Equivalent Static Models—Use and Limits

    Translate selected dynamic effects into a static comparison without hiding the method's assumptions.

    Planned
02

Impact, Momentum, and Stress Waves

Connect collision mechanics with wave propagation through structural materials.

  1. Momentum Transfer During Impact

    Relate force-time history, impulse, and change in momentum.

    Planned
  2. Energy, Contact, and Deformation

    Track kinetic energy into elastic deformation, plastic work, damage, and rebound.

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  3. Stress Waves Inside Solids

    See how a localized disturbance travels through a structural member.

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  4. Reflection and Transmission at Boundaries

    Explore impedance changes, free surfaces, interfaces, and returning waves.

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  5. When Local Impact Becomes Global Response

    Compare contact duration with member and system time scales.

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03

Energy Absorption and Impact Response

Develop mechanisms that manage energy while controlling force, deformation, and failure.

  1. How Structures Absorb Energy

    Compare elastic storage, yielding, crushing, friction, and damping.

    Planned
  2. Force–Deformation Shape of an Absorber

    Relate plateau force, stroke, and absorbed energy.

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  3. Beam Response Under Impact

    Connect local contact, flexural waves, supports, and global deformation.

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  4. Plates and Panels Under Impact

    Study membrane action, bending, punching, and boundary restraint.

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  5. Recognising Impact Failure Modes

    Distinguish ductile response from brittle, shear, penetration, and connection failures.

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04

Materials at High Loading Rates

Understand how rate, temperature, confinement, and accumulated damage alter resistance and ductility.

  1. What Strain Rate Means

    Measure how quickly deformation develops and why test rate matters.

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  2. Dynamic Strength and Ductility

    Interpret rate-sensitive stress–strain behaviour without confusing it with universal enhancement.

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  3. Material Models for Rapid Loading

    Choose a constitutive representation suitable for the response and available evidence.

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  4. Using Dynamic Material Test Data

    Check specimen scale, rate range, uncertainty, and model calibration.

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05

Blast Loads and Structural Interaction

Move from pressure-wave characteristics to time-dependent loading on real structural surfaces.

  1. Anatomy of a Blast Wave

    Read peak overpressure, arrival time, duration, impulse, and negative phase.

    Planned
  2. Scaling and Stand-Off

    Use scaled variables carefully to organize blast-wave observations.

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  3. Incident and Reflected Pressure

    Understand why surface orientation and interaction change applied pressure.

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  4. Clearing, Diffraction, and Load Distribution

    Track how pressure evolves around finite structural surfaces.

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  5. Building a Pressure–Time Model

    Convert a complex wave history into a transparent analysis input.

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  6. Performance Objectives for Blast Resistance

    Connect risk, continuity, collapse prevention, and controlled damage.

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06

Analysis, Failure, and Dynamic Stability

Select analysis fidelity and connect computed response to credible failure mechanisms.

  1. Transforming a Member into an SDOF Model

    Develop equivalent mass, load, resistance, and deformation measures.

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  2. Resistance Functions and Ductility

    Represent elastic, plastic, and post-peak structural behaviour.

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  3. Pressure–Impulse Interaction

    Map response regimes while preserving the boundary between screening and design.

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  4. Selecting Credible Failure Mechanisms

    Test flexure, shear, connection, local damage, and progressive effects.

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  5. Dynamic Buckling

    Explore how load duration, imperfection, inertia, and instability interact.

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  6. Choosing Analysis Fidelity

    Decide when hand models, nonlinear SDOF, MDOF, or detailed simulation are justified.

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07

Coupled and Advanced Response Models

Extend single-response intuition to interacting components and spatial structural systems.

  1. Two-Coordinate Impact Models

    Represent contactor and target motion or two interacting structural components.

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  2. MDOF Response to Impact

    Assemble coupled mass, stiffness, damping, and contact actions.

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  3. MDOF Response to Blast

    Apply distributed transient loading and recover member and system demand.

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  4. Verification, Sensitivity, and Uncertainty

    Challenge numerical results through equilibrium, energy, refinement, and parameter studies.

    Planned