AXIAL IMPACT OF OPEN-SECTION TWCF COLUMNS – EXPERIMENTAL STUDY
Journal Title: ROMANIAN JOURNAL OF TECHNICAL SCIENCES - APPLIED MECHANICS - Year 2014, Vol 59, Issue 1
Abstract
The paper is devoted to the results of experimental study into the crushing behaviour of TWCF open section columns subjected to axial impact. Steel channel and top-hat section was under investigation. The paper contains a results summary of quasi-dynamic and dynamic impact tests performed on about 100 of those sections of different dimensions subjected to axial load of different velocities. Experimental quasi-dynamic tests were conducted on the testing machine with different loading velocities up to 600 mm/min. The impact tests were performed on the drop hammer rig with the impact energy up to 5 kJ and impact velocity up to 10 m/s. An influence of the column initial length and impact velocity on the crushing behaviour (failure mode) was investigated. Particularly, the critical length of the transition from progressive buckling to global bending failure mode and its dependence on section dimensions and the impact velocity was under investigation. Experimental results were compared with the results of the analytical calculations of critical (transition) buckling length based on the simplified analytical theoretical models. The results are presented in load-time and load-shortening diagrams and failure patterns. Some conclusions concerning the determination of critical buckling length, applicability of the theoretical models applied and an influence of the impact velocity upon the critical buckling length and final mode of failure related to the energy absorption capability of columns are derived.
Authors and Affiliations
MARIA KOTEŁKO, ARTUR MOŁDAWA, MARCIN JANKOWSKI
Keywords
Related Articles
- EP ID EP179925
- DOI -
- Views 64
- Downloads 0
COMPARISON OF INTERNATIONAL VEHICLE TESTING CYCLES USING SIMULATION
Over the last decades, one of the major risks faced by mankind has been the anthropogenic contribution to environmental pollution and degradation in general. This has posed a substantial burden on both human health and e...
AN INTRODUCTION TO DSmT. FIRST PART
The management and combination of uncertain, imprecise, fuzzy and even paradoxical or highly conflicting sources of information has always been, and still remains today, of primal importance for the development of reliab...
FORMULATION ANALYTIQUE DES EFFORTS DE REDUCTION AU DROIT DE L’INTERFACE FLUIDE-STRUCTURE DES BARRAGES RIGIDES A FRUITS COMPOSES SOUS EXCITATIONS SISMIQUES
Les barrages, constituent des ouvrages à caractère stratégique important. L’évaluation de leur sécurité parasismique requiert, entre autres, une détermination précise des pressions hydrodynamiques et par suite de la dist...
THE INFLUENCE OF THE WHEEL CONICITY ON THE HUNTING MOTION CRITICAL SPEED OF THE HIGH SPEED RAILWAY WHEELSET WITH ELASTIC JOINTS
The axle hunting is a coupled lateral and yaw self oscillatory motion which is largely determined by wheel–rail contact geometry. The stability of this motion is an important dynamic problem that determines the maximum o...
GIMBALS FOR VECTOR CONTROL OF NERVA LIQUID MOTOR TRANSPORTERS
The team for space technology of UPB presents the project for achieving a proprietary orbital access launching system under the NERVA readiness opportunity. The NERVA vehicle is a readily available and low cost means to...