Determination of loading scenarios on buildings due to column damage

The majority of imaginable (and relevant) accidental scenarios on building structures are initiated at the ground level by a column suffering damage, mainly due to a localized explosion or a vehicle impact. The transmitted vertical forces from the column to the structure are decisive in understanding the response of the building and are the subject of analysis of this paper. The classic definition of a column loss scenario is extended here by means of a simplified analytical approach to characterize the axial forces appearing in the column during the damage process. A simple closed-form solution is proposed to define the loading scenario on the structure and compared to the classic rectangular (un)loading approach. In certain cases, the proposed analysis shows a more unfavorable loading situation for the structure, which needs to be accounted for during design

Design report of the specimens for all the experimental analyses - Deliverable D.4.1 - Robustimpact

The present report focuses on the design of the experimental analysis that are going to be performed within the ROBUSTIMPACT project (Grant Agreement Number: RFSR-CT-2012-00029). The project focuses on the behavior of composite steel and concrete framed buildings against accidental actions. Within the project, several experimental analyses are going to be performed spanning from the local to the global behavior. The report is divided in 4 parts, each one describing the preliminary work of each partner of the project. In particular: Part A reports the work performed by USTUTT (University of Stuttgart) including the design of four experimental tests on composite joints and two experimental tests on composite frames. In particular, the composite joints will be investigated in order to better understand the behavior in terms of activation of catenary actions. The tests on composite frames are performed investigating the influence of the high speed loading and strain rate effects on the deformation capacity of these structures. Part B reports the work performed by ULg (University of Liege) including the design of 44 experimental impact tests on beam-to-column joints and column base joints. With these tests will be possible to investigate the response of different joint components under impact loading for different level of energy. Part C reports the work performed by UTRE (Università degli Studi di Trento) including the design of the case study reference structures and the design of the experimental tests. In particular, two 3D full scale tests will be performed by simulating to total loss of the impacted column in order to investigate the redundancy of the 3D slab system in terms of activation of membrane effects. Part D reports the work performed by RWTH (University of Aachen) including the design of six crash tests on columns that are going to be performed in order to investigate the residual strength of the damaged member after the impact. The aim is to determine the response of the member during the impact as well as the dynamic interaction of the member with the surrounding structure

Robustimpact - Drawings for producing the test specimens - Deliverable 4.2

Within the RFCS project RobustImpact an experimental campaign, aimed at investigating the behaviour of framed steel and concrete composite structures under accidental loading conditions, was planned. The residual strength of the damaged member after an impact as well as the dynamic interaction of the member with the surrounding structure will be experimentally investigated. The activation of alternate load paths will be also studied through tests on 3D slab and 2Dbeam systems. Additional tests on composite joints, beam-to-column joints, column bases and T-stub tests under high speed loading and impact loading will contribute at investigating the influences of strain rate effect on the deformation capacity of the connections.This document collects the drawings prepared by the above mentioned partners for producing the test specimens

Robusimpact - Design report of the specimens for all the experimental analyses - Deliverable 4.1

The present report focuses on the design of the experimental analysis that are going to be performed within the ROBUSTIMPACT project (Grant Agreement Number: RFSR-CT-2012-00029). The project focuses on the behavior of composite steel and concrete framed buildings against accidental actions. Within the project, several experimental analyses are going to be performed spanning from the local to the global behavior