محققان دانشگاه یوتاه ایالات متحده آمریکا برای تقویت پایه های پل های صدمه دیده در زلزله روشی جدید با استفاده از مواد کامپوزیتی ابداع کردند. با این روش می توان پس از زلزله پل را بازسازی کرد و آن را در مقابل پس لرزه ها و یا حتی زلزله های آتی مقاوم ساخت. برای جزئیات بیشتر به متن زیر توجه فرمایید.

Photo credit: Dan Hixson/University of Utah College of Engineering

The process works as follows: first, a number of steel rebars with heads are drilled into the foundation around the column and secured with an epoxy. Then two halves of a circular shell made of the composite fiber (that are just millimeters thick) are placed around the column and rebar and spliced together. Concrete is poured around the column and over the rebar with the composite fiber acting as a mold. The result is a repaired column with approximately the same structural integrity as the original column, Pantelides said.

“The circular shape gives you the best strength for the amount of material you are using. The stresses are distributed equally all around the periphery,” he said. “With this method, if there are future earthquakes or aftershocks the bridge will survive and damage will happen adjacent to the donut. This gives the bridge a second life.”

Pantelides and his team have filed patents on the process, and he said it can be utilized immediately by construction crews in earthquake-ravaged areas.

This process is outlined in a new paper published in the most recent issue of the American Concrete Institute Structural Journal.

The research was funded by the Utah, New York and Texas departments of transportation and the Mountain Plains Consortium. The co-authors of the study are University of Utah civil and environmental engineering doctoral students Joel E. Parks and M.J. Ameli and Dylan N. Brown, a bridge engineer at Michael Baker International in Madison, WI