SEISMIC SAFETY OF BRIDGE CRANE STEEL （地震安全的桥式起重机钢）.pdfVIP

SEISMIC SAFETY OF BRIDGE CRANE STEEL STRUCTURES OPERATING IN NPP Kalin RADLOV*, Vesko PANOV** *University of Architecture, Civil Engineering and Geodesy – Sofia, Bulgaria **Technical University – Sofia, Bulgaria Abstract. The seismic stability assessment of systems and equipment operating in Nuclear Power Plants (NPP) is a very important preventive precaution for ensuring their emergency safety. The actuality of this case study arises extremely after Fukushima NPP disaster, caused by the earthquake on 11 March 2011. Bridge cranes are a significant and integral part of the technological equipment, which affects the modern NPPs’ safety. The main aim of the present study is to propose an analytic-simulation approach for analysis of bridge crane steel structures dynamic behavior during earthquake impact as to evaluate mostly the sliding ability of crane traveling wheels on rail roads. Loads and harmful effects acting on the crane bridge steel structure caused by the sliding phenomenon are defined and analysed. Keywords: bridge crane, steel structure, seismic impact, sliding, safety 1. Introduction and 2] by IAEA for seismic qualification, not only The present days’ break downs and accidents in for NPPs at all, but also for their equipment. Bridge NPPs caused by earthquakes become more frequent. cranes are one of the most numerous group material Particularly after Fukushima NPP (caused by handling equipments, which operate in NPPs. earthquake in Japan on 11 March 2011) engineers Question with se