“Unexpected” failure patterns and dynamic collective behaviour of an assembly of buildings subjected to horizontal impact

摘要: Abstract Based on a fully-coupled rigorous mathematical approach, we analyse the anti-plane collective behaviour of group identical buildings that stand at regular spatial intervals linear elastic half-space and are subjected to dynamic horizontal impact load. Each building in this “town” is assumed consist an spring connects concentrated mass top rigid foundation bottom. We show that, due multiple interactions between through (the waves in) ground, eigenfrequencies structural (town) become lower than resonant frequency single building. This shift may be called “town (or city) effect,” give rise “unexpected” failure patterns frequencies. summarise some quantitative information about town effect suggest its significance by investigating actual found occasions 1976 Friuli, Italy, 2007 Noto Peninsula, Japan, earthquakes. The elastodynamic analysis here different from conventional ones engineering seismology where each individual structure handled separately. shifts recognised if mechanical movement analysed jointly. induced general (e.g., blasting, aircraft impact), therefore, simple analytical model contain essential features will crucial importance evaluating more performance safety groups urban environments.