Nonlinear Behaviour of Multi-Joist Timber-Concrete Composite Floors

Lead Research Organisation: University of Bristol
Department Name: Civil Engineering


This PhD study will use both tests and numerical analyses to understand the quasi-static
load responses of timber-concrete composite (TCC) floors. One emphasis will be the use of
floor specimens with multiple timber joists, so as to build on previous work where a single Tsection
comprising a width of slab with just one joist has been investigated. To that end, a
small number of multi-joist TCC specimens will be fabricated and tested, with significant
instrumentation used to work backwards to issues such as load-sharing between individual
T-section TCCs. Nonlinear FE will be used to try and predict the measured load responses.
Use of the verified FE as a tool to conduct wide-ranging parametric studies will be a key
feature of the work, which is IStructE - funded and includes collaboration with ARUP.
Publishing of journal papers (which Joshua and I along with co-authors from Trento
University in Italy have already done on previous TCC work) will be a focus of this work, as
will presentations to industry at any available opportunity.


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Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/N509619/1 01/10/2016 30/09/2021
1793830 Studentship EP/N509619/1 01/10/2016 31/03/2020 Joshua Mudie
Description In multi-joist TCCs, transverse distribution of midspan moments differs strongly from that of support reactions. This is an important consideration when designing TCC floors.

Novel instrumentation layouts were used to prove this via back-calculation of midspan moment sharing from tests.

The expanded steel mesh plate shear connector shows good stiffness and ductility as a shear connector, and partners well with high-strength timber such as Beech LVL.
Exploitation Route Further work has been identified and could be the subject of further funding bids.
Sectors Construction

Description Open Day Composite Beam Demonstration 
Form Of Engagement Activity Participation in an open day or visit at my research institution
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Public/other audiences
Results and Impact Open day activity to demonstrate the principle of composite beam behaviour. People could learn about how composite beams improve structural performance, and test small wooden beams in a testing frame made specifically for this purpose, with full load and displacement instrumentation to understand the load response of different beams
Year(s) Of Engagement Activity 2018,2019