Analyzing the Effective Parameters in Pounding Phenomenon Beeween Adjacent Structure due to Earthquake

Abstract eng:
Since Iran is located in one of the most earthquake–prone zones in the world, and that, once in a while an earthquake causes extensive financial and life damages and also because in large cities, tall buildings are closely constructed with inappropriate distance to provide more living space, it is of great importance to study the impact of damages caused by earthquakes. During strong earthquakes, because of different–phase oscillations of buildings with inappropriate distances, pounding phenomenon occurs. In this research, buildings with 2 to 15 stories and different heights were put together using GAP joint element, and nonlinear time–history analyses were done for Tabas, Elcentro and Sakaria accelerographs. The responses of both pounding and non–pounding cases were compared. With analyzing the results, we found out that the impact increased the responses in taller buildings but decreased them in shorter ones. The largest increase was occurred when the height difference was 3 stories. Then the effective parameters in pounding phenomenon, hardness and the distance between the structures were studied. Based on the studied of the present work, the maximum responses (lateral displacement and story shearing) caused by the pounding of two adjacent buildings, decreases in the shorter building, whereas it increases in the taller one, which may lead to critical conditions. Maximum responses (lateral displacement and story shearing) in the shorter building decreased throughout the whole height of building except for the pounding point. Maximum responses (lateral displacement and floor shearing) in the taller building increased throughout the building. Depending on the accelerograph, there are different dynamic responses and consequently different responses caused by pounding. Earthquakes with acceleration history of repeatedly changes in direction, which have higher acceleration maximums, lead to more intensive effect. One of the ways to decrease pounding effects is considering a proper distance between the two adjacent structures. This distance decreases the pounding effects; as a result, the responses will be similar to those of non-pounding case. One of the ways to decrease pounding effects is to harden the building. This change decreases the pounding effects; as a result, the responses will be similar to those of non-pounding case.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket