Brisa's model for life cycle performance monitoring and decision- making process

<p>The asset management model must allow for visibility across the asset portfolio, enabling a more coherent and informed decision-making process. This topic addresses how the need to improve analytic capabilities and decision support techniques leads to the guidelines of Brisa’s Information System Dashboard, covering asset’s availability and condition indexes (Asset Monitoring), risk levels and relevant costs key performance indicators.</p>

Lifecycle Quality Control of New Locks in a Public Private Partnership setup

<p>A Public Private Partnership (PPP) setup underlines and increases focus on lifecycle quality and lifecycle quality control. The new lock PPP’s in The Netherlands provide unique incentives that ensure the following day to day practice:</p><ol><li> <p>Implementation of a lifecycle performance-based design with a focus on availability- and reliability engineering.</p></li><li> <p>Using KPI’s and real-time verification on technical components enhances requirements compliance.</p></li><li> <p>Predictive maintenance through continuous condition based monitoring.</p></li><li> <p>Rigorous quality management based on ISO 15288, 15504 and 55001 to control life cycle quality.</p></li><li> <p>Increasing long term client benefits in life cycle costing.</p></li></ol>

Models for Evaluating Shear Strength on Members with Circular Cross Section

<p>Solid circular columns are often used as structural supports in bridges, buildings and foundations due to their simplicity of construction and because their strength is similar in any direction. This deem them very suitable to resist wind and seismic loads. Hollow core circular concrete members are much less structurally used than solid circular cross sections. However, these can be found in concrete chimneys, concrete pipes and elevated water tanks, as well as in large bridge columns and offshore platforms. Codes do not usually propose specific formulations for evaluating the shear strength of such structural types or if they do, they do so in a very simplified manner.</p><p>Hence, an analytical model for evaluating the contribution of the transverse reinforcement in concrete members of solid and hollow circular cross section is presented in this paper. After a thorough bibliographic research on the previous studies on the matter, the shortage of work accomplished on the topic has been assessed and the unsolved problems identified. A formula for evaluating the shear transferred by spiral reinforcement in solid members is presented. A formula for the calculation of hollow core circular columns with both vertical and spiral reinforcement is also deduced. Assumptions made for the calculation of this formulation have been deduced theoretically and then checked empirically. Hence, shear tests on circular hollow core specimens will be also presented.</p>

Bond behaviour of chemically prestressed textile reinforced concrete

<p>The bond behaviour of concrete specimens with carbon textile reinforcement was investigated in the presented research programme. Pull-out specimens were cast from self-compacting concrete with expansive admixtures and in this way chemical prestress was introduced. The aim of the research was to compare bond behaviour between prestressed specimens and non-prestressed control specimens. During pull-out tests, the pull-out force and notch opening were measured with a load cell and laser sensors. Further, bond - slip and pull-out force - crack width relationships were drawn and compared for prestressed and non-prestressed specimens. Chemically prestressed specimens reached 24% higher bond strength than non-prestressed ones. It can be therefore concluded, that chemical prestressing positively influences the bond behaviour of concrete with textile reinforcement and thus better utilisation of its properties can be provided.</p>