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Details for Dr Nicholas Alexander

Personal details
Name Dr Nicholas Alexander
Job title Senior Lecturer in Structural Engineering
Department Department of Civil Engineering University of Bristol
Contact details This expert can be contacted via the University of Bristol Public Relations Office.

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work+44 (0)117 331 8092
Qualifications BSc(Eng) Lond, PhD(UCLond), CMath MIMA, CSci
Professional details
Membership of professional bodies Institute of Mathematics and its Applications (MIMA)
Chartered Scientist, CSci
Chartered mathematician, CMath
Graduate member of institution of civil engineers
Keywords earthquake engineering
structural dynamics
nonlinear dynamics
Areas of expertise At the moment, I am working on the following research projects:

-The behaviour of nonlinear moment resisting frames under seismic excitation.

-Pre-stressed frames with opening joints that allow structures to soften but remain undamaged after earthquakes.

-Nonlinear tuned mass dampers can we improve on a linear tuned mass damper?

-All analysis in earthquake engineering is predicated on the accurate processing of ground motion timehistories. We use state of the art signal processing ideas such as wavelet decomposition and denoising, Wigner-ville methods, Bispectra, Volterra Kernels, adaptive total least squares etc.

-Analysis of long structures that are subjected to differential seismic excitation both in acceleration and displacement; i.e. the multi-support excitation of bridges.

-Human-Structure interaction dynamic feedback between structures and people that can produce complex and unexpected resonances.

-Understanding the dynamics of piled structures, using a nonlinear dynamics perspective.

-Vulnerability of cities; structure-soil-structure interaction.