Until the 1950s, football fans watched the games of suit and tie, sitting quietly, and vibrating (or jumping) only in a stronger play or goal of those of Didi, Pelé or Garrincha. From the 1970s, the “galera” (crowd) became more active in the show, in choreographies that gathered thousands of people jumping at the same time, sometimes throughout the game.

But this vibration can be dangerous if the structure of the arena is not prepared to withstand it. One way to prevent accidents is to analyze the dynamic behavior of the stands, defining the vibration it needs to endure and how to adapt it to fulfill that mission. This is the theme of the free lecture that engineer Marco Juliani, director of IEME Brazil Engenharia Consultiva, will do at the Institute of Engineering, in São Paulo, on October 15th.

During the lecture, Juliani promises to give a brief history of the stand stadium design criteria and compare them with the new international safety and comfort requirements regarding vibrations, including those imposed by FIFA. The engineer will talk about methods of dynamic structural adequacy: diagnosis, design, execution and efficiency testing.

The meeting should be closed by an analysis of the situation of the Brazilian stadiums. IEME Brazil works with Italian technology for the dynamic evaluation of structures, which allows the detection of structural problems in the stands of stadiums due to excessive vibrations of the audience. The company has already provided services for the Morumbi and Palestra Itália stadiums, in São Paulo, and Maracanã, in Rio de Janeiro.