Engineering Commons^™

Reinforced Concrete Deterioration Of A 100 Year Old Structure In A Marine Environment, Ross O'Donovan

Theses

The current study investigates the deterioration of a 100 year old bridge located in a harsh marine environment. Constructed in 1908 - 1909 the Mizen Head Footbridge was one of the oldest reinforced concrete bridges in Ireland. The demolition of the bridge in 2009 provided a unique opportunity to examine its service life and to extract samples for analysis and investigation. A review of the construction of the bridge, and its maintenance history are presented, with a view to analysing their influence on the behaviour of the concrete.

Reinforcement corrosion due to chloride attack was identified. A focused study indicates …

An Investigation Into The Potential Of Increasing The Span Of Solid Slab Deck Bridges, Eamonn Kiernan

Theses

Solid slab deck bridges are a common type of structure employed for short to medium span bridges. They may be of rapid build nature if they are made up of prestressed precast sections with concrete infill deck.

The aim of this research was to investigate the potential to increase the span of solid slab deck bridges by the employment of high strength concrete (HSC), lightweight aggregate concrete (LWAC) and the use of a voided deck.

The analysis undertaken in the research was based on a bridge, which was recently constructed in Cork; the bridge was constructed using MY beam sections, …

The Potential For The Elimination Of Expansion Joints And Bridge Bearings From Existing Road Bridges In Ireland, Conor Keena

Theses

This research was focused on determining the feasibility of eliminating expansion joints and bridge bearings from existing short to medium span road bridges in Ireland. It is possible that this could provide a significant long-term economic benefit to bridge owners. A literature review was carried out as part of the research. This included investigations into research conducted in the areas of thermal movements of bridges, concrete creep and shrinkage, soil-structure interaction, lifetime costing, design standards and finite element analysis, and the elimination of bridge expansion joints in other countries.

Finite element analyses were carried out on two existing road bridges. …