|State of the Art Report on the Use of NDT/SDT for the assessment of structural timber members on site. |
Report made by Working 1 – Task Group 2.
state of the art report has been prepared by the Working Group 1/Task
Group 2: “Combination of NDT/SDT for the assessment of timber
structures on site”. The present report is divided in four broad themes
that describe some of the achievements and reflections among research
groups in the last decades in several topics related to the scope of
• Part I includes general matters related to the use of NDT/SDT methods such as calibration, reliability of field measurements, statistical approaches to derive properties, as well as to update and combine information from different sources;
• Part II includes the application of NDT/SDT methods for predicting the socalled reference properties and also specific methods aimed at determining other mechanical/physical properties whose estimation is important for the assessment of particular problems associated to timber members;
• Part III deals with issues fundamental to the evaluation of the nature, extent and causes of local features that can induce failures, damage and vulnerabilities (e.g. aging, mechanical damage, delamination, fissures and biological deterioration);
• Part IV includes a group of chapters highlighting the application of NDT/SDT methods in specific contexts.
PART I – ENHANCEMENT OF NDT/SDT INFORMATION THROUGH STATISTICAL/PROBABILISTIC MODELS:
PART II – ASSESSMENT OF REFERENCE PROPERTIES:
PART III – ASSESSMENT OF THE INTEGRITY OF STRUCTURAL TIMBER MEMBERS
PART IV – CASE STUDIES
State of the Art Report on the Reinforcement of Timber Structures.
Report made by Working Group 2
The main aim of the report is to summarise the current and emerging methods that are available to repair or enhance the structural performance of timber structures and to provide guidance to the use of these methods. The report is organised in two main parts. In Part I, the different structural elements and subsystems that make up our buildings are considered. These include beams, floors, columns, shear walls and connections. The possible failure modes are described and the appropriate reinforcement strategies for each case are presented, including consideration of cultural heritage issues. The reinforcement of buildings to increase their resistance to seismic actions is also included in this part. The focus of Part II is on reinforcement materials and methods. These include adhesive systems, mechanical fasteners such as glued-in rods and self-tapping screws, fibre reinforced polymer laminates and bars, and emerging nano-structured materials. The properties of these materials, their methods of application and relevant design rules are described. The report provides details not only of the latest research findings related to the reinforcement of timber structures, but most importantly how these methods can be best used in practice. Many examples are given of the implementation of the various reinforcement methods. Because of this, the report will be of interest not only to the research community, relevant standardisation bodies, and policy makers but also to practitioners, representatives of the timber construction industry and product developers in the sector of reinforcement technologies.
|INTRODUCTION: Annette M. Harte, Philipp Dietsch. |
PART I – REINFORCEMENT APPLICATIONS
PART II – REINFORCEMENT METHODS
OUTLOOK - Philipp Dietsch, Annette M. Harte.
TimberSave is a tool that has been developed to provide designers with a range of reinforcement solutions for particular problems and which evaluates these solutions based on defined criteria. It has been developed for timber roof structures but it can be expanded to include all timber structural components and systems.
Contact: Annette Harte, NUI Galway, Ireland: firstname.lastname@example.org
|Dowload: Video demonstration.|
State of the Art Report on the Monitoring of Timber Structures.
Report made by Working Group 3.
|Timber structures have been in use for centuries, with proven durability. In recent years, timber has become particularly important, due to its standing as a truly renewable material for construction and carbon storage purposes. Monitoring is an important tool which can assure the durability of timber structures and optimization of maintenance. The field of WG3 shows the activities within monitoring of timber structures, predominately from a European perspective. WG 3 represents a multidisciplinary approach considering expert knowledge from timber engineering, material science, non-destructive testing, sensor development, and monitoring. This is collected in the set of articles compiled in the special issue.|