Study On Dynamic Response And Comfort Analysis Under Human Activity

Now, with the improvement of people’s living standard and the pursuit of quality, the emergence of High-level, large space and span a variety of complex spatial structures, the floor vibration comfort of the complex structure under pedestrian loads receives more and more people’s attention. In this paper, a real complex structural engineering (concert hall structure) as a objuct of study, Author researched vibration comfort of the long-span complex structure under the human activities, And analyzed the influencing factors of the floors vibration comfortOn the basis of reviewing a lot of domestic and foreign literatures, Intoduced the calculation methods of the building structure vibration comfort and vibration comfort evaluation criteria, Analyzing the differences and use between the different vibration comfort evaluation criteria, Provided a theoretical background for this article. Identified pedestrian load calculation model and time history in this article. Several vibration comfort evaluation criteria and related specifications were detailed. Based on the background work, selected compatible vibration comfort evaluation criteria.Modal analysis pointed out that the complex structure of large flow of people or population density only meeting the requirements of The fundamental frequency is not enough. The effect of deterministic pedestrian Pointed out that the floor of complex structure under the role of single met the vibration comfort requirements. Structural response under the population action comparing to the single role is to be More intense. The general function formula about crowd numbers and the peak acceleration were given. Considering the randomness of the crowd walking, Given the function expression about Multiples of Acceleration increasing and the number of random population.The analysis of influencing factors pointed out:Floor plate thickness and effective live-loading have limited impact on the vibration response, In case of peak acceleration planted roof is smaller than the waterproof roofing, but there is little difference between the two. The floors of cantilevered structures and large-span in the entire structure is a relatively weak component. Basing population-comfort, given the recommended value of the largest population density. Pointed out that the design of building structures, not only we determine the population density from the use of the building, but also the crowd comfortable need to be consi-dered from the perspective of the vibration comfort.