The impact factor of general road bridges is typically calculated according to Korea Highway Design Code(KHDC) or Design Guidelines For Cable-Supported Bridges in Korea. Above design codes define the impact factor as the function of span length or effective span length. But calculated impadt factors from this function are different to the measured values of long-span bridges such as cable-stayed bridge, suspension bridge. There are several methods to estimate the impact factor of cable supported bridges. In this study, the impact factor of cable-stayed bridges is estimated from dynamic load tests and compared to calculated values from the various design codes.

• 김인호(한국시설안전공단 특수교유지관리센터 직원, 공학박사) | Kim, In Ho
• 이용택(한국시설안전공단 특수교유지관리센터 직원, 공학석사) | Lee, Yong Taek
• 김규선(한국시설안전공단 특수교유지관리센터 파트장, 공학박사) | Kim, Gyu Seon
• 이덕근(한국시설안전공단 특수교유지관리센터 대리, 공학석사) | Lee, Deok Keun
• 마상수(한국시설안전공단 특수교유지관리센터 직원, 공학석사) | Ma, Sang Su