Planning an evaluation experiment effect of the complexity of the combination of dynamic impacts from surface and underground

This article outlines the planning and development of a program for conducting field studies to investigate the impact of vibration on buildings and structures caused by the combined dynamic loads from surface and underground urban transport systems. The existing regulatory framework concerning transportation-induced vibration is reviewed. The paper analyzes available practical data on the vibrational impact from individual sources (tram, bus, metro) as well as the combined effect of simultaneous vibration from all three transport types. An identified correlation from the analysis of the complex dynamic loads allows for predicting future events related to crack propagation in buildings located in immediate proximity to the sources of man-made impact. The sources of vibrational impact are metro trains, trams, and buses operating in close vicinity to the structures. Specialized equipment was selected for vibration measurements: a noise and vibration analyzer, a data recorder, and a vibration test system. To select the field site and conduct the experiment, an analysis of traffic load on surface and underground transport arteries in Moscow was performed. Three areas with the highest traffic load were chosen for simultaneous vibration measurements from the metro, trams, and road transport along Krasnoprudnaya, Paveletskaya, and Baumanskaya streets.