By: Joana Pellerano /Portal 2014

Until the 1950s, football fans would watch games in suits and ties, sitting quietly, and vibrated (or jumped) only in a stronger move or in a goal like those of Didi, Pelé or Garrincha. From the 1970s onwards, the “galera” began to participate much more actively in the show, in choreographies that brought together thousands of people jumping at the same time, sometimes during the entire game.

But this vibration can be dangerous if the arena structure is not prepared to withstand it. One way to prevent accidents is to analyze the dynamic behavior of the bleachers, defining what is the vibration it needs to withstand and how to adapt it to fulfill this mission. This is the theme of the free lecture that engineer Marco Juliani, director of IEME Brasil Engenharia Consultativa, will give at the Institute of Engineering, in São Paulo, on the next 10/15.

During the lecture, Juliani promises to make a brief history of the design criteria for soccer stadium bleachers and compare them with the new international safety and comfort requirements in relation to vibrations, including those imposed by FIFA. The engineer will talk about dynamic structural adequacy methods: diagnosis, design, execution and efficiency tests.

The meeting should end with an analysis of the situation in Brazilian stadiums. IEME Brasil works with Italian technology for the dynamic evaluation of structures, which allows detecting structural problems in the stands of stadiums as a result of excessive vibrations from the audience. The company has already provided services for the Morumbi and Palestra Itália stadiums, in São Paulo, and Maracanã, in Rio de Janeiro.