Validation and enhancement of risk assessment procedure for seismic connectionsFunded under: ECSC-COAL-STEEL-RTD C
Quantifying the performance of beam-column connections used in seismic applications is a critical requirement to ensure structural safety under earthquake loading conditions. However, performance requirements are affected by design, fabrication and mechanical properties. The objective of the VERAPS project was to develop tools for the evaluation of cyclic plastic rotation capacity of welded beam column moment connections under seismic loading. The project comprised the following activities: - assessment of previous full-scale beam-column connection tests using the IIW Seismic Risk Assessment Procedure (RAP); - design and fabrication of a series of eight full-scale beam-column test assemblies, together with mechanical property evaluation; - full-scale tests on eight connections with beams and columns of varying moment capacity and weld metal toughness to cover different categories of risk; - finite element modelling of residual stress from welding, crack initiation and propagation and overall connection behaviour; - demonstration of safety assessment approaches for evaluating connection performance by finite element modelling and fracture mechanics approaches; and - development of tools and techniques for the evaluation of connection performance under cyclic loading. Overall, the project has demonstrated the importance of optimising the design of moment connections, in particular in terms of relative moment capacities of the joint and the beam, the behaviour of the shear panel and the methods used to connect the shear tabs. Coupled with the use of low sulphur sections, weld metal of good toughness and controlled fabrication procedures, good seismic performance can be achieved. Predictive tools for evaluating such performance have been developed and validated within the project.
Bibliographic Reference: EUR 22993 EN (2008), 147 pp. Euro: 20
Availability: Katalogue Number: KI-NA-22993-EN-S The paper version can be ordered online and the PDF version downloaded at: http://bookshop.europa.eu
ISBN: ISBN: 978-92-79-07080-8
Record Number: 201010024 / Last updated on: 2010-01-07
Original language: en
Available languages: en