Forced motion and free motion aeroelastic tests on a new concept dynamometric section model of the Messina suspension bridge

An enhanced forced vibration rig for wind tunnel testing of bridge deck section models in arbitrary motion

“…Significant progress has been made since Ukeguchi et al, (1966) presented the first experimental results for bridge decks in 1966, and an impressive amount of forced vibration rigs used in research can be found in the literature (e.g. Cao and Sarkar, 2012;Chen et al, 2005;Diana et al, 2004Diana et al, , 2010Diana et al, , 2015Falco et al, 1992;Han et al, 2014;Lee and Kwon, 2009;Li, 1995;Matsumoto et al, 1993;Matsumoto, 1996;Neuhaus et al, 2009;Sarkar et al, 2009). Forced vibration tests considering vertical and pitching motions are now routinely conducted when designing bridges, occasionally allowing for coupling between the two motions (Cao and Sarkar, 2012;Diana et al, 2004;Falco et al, 1992;Han et al, 2014).…”

“…Cao and Sarkar, 2012;Chen et al, 2005;Diana et al, 2004Diana et al, , 2010Diana et al, , 2015Falco et al, 1992;Han et al, 2014;Lee and Kwon, 2009;Li, 1995;Matsumoto et al, 1993;Matsumoto, 1996;Neuhaus et al, 2009;Sarkar et al, 2009). Forced vibration tests considering vertical and pitching motions are now routinely conducted when designing bridges, occasionally allowing for coupling between the two motions (Cao and Sarkar, 2012;Diana et al, 2004;Falco et al, 1992;Han et al, 2014). Several experimental setups capable of forcing the section model in horizontal, vertical and pitching motions have been presented more recently (Diana et al, 2004;Han et al, 2014;Lee and Kwon, 2009;Neuhaus et al, 2009;Sarkar, et al, 2004).…”

“…Forced vibration tests considering vertical and pitching motions are now routinely conducted when designing bridges, occasionally allowing for coupling between the two motions (Cao and Sarkar, 2012;Diana et al, 2004;Falco et al, 1992;Han et al, 2014). Several experimental setups capable of forcing the section model in horizontal, vertical and pitching motions have been presented more recently (Diana et al, 2004;Han et al, 2014;Lee and Kwon, 2009;Neuhaus et al, 2009;Sarkar, et al, 2004). It is interesting that experimental setup developed at Iowa State University (Cao and Sarkar, 2012;Sarkar et al, 2007Sarkar et al, , 2004) is able to perform both free and forced vibration test.…”

“…Forced vibrations tests can the readily be performed by rods that are connected to the driving mechanism placed above the test section. The majority of the setups rely on a fixture of the section model sliding on linear rails that are driven by an eccentric shaft (Chen et al, 2005;Han et al, 2014;Li, 1995;Matsumoto et al, 1993;Neuhaus et al, 2009;Sarkar et al, 2007), whereas some setups are driven by electric or hydraulic actuators (Diana et al, 2004;Lee and Kwon, 2009). The forced vibration setups has advanced impressively regarding both forced frequencies and amplitudes (Neuhaus et al, 2009).…”

“…The forced vibration setups has advanced impressively regarding both forced frequencies and amplitudes (Neuhaus et al, 2009). Furthermore, the setups can also adapt a fluid medium instead of air to improve the accuracy of the force measurements (Li, 1995), enable the section model to be tested under different angles of attack or yaw angles (Diana et al, 2004) or generate impulsive step motion to be generated to study the step response of the self-excited forces (Caracoglia and Jones, 2003). However, the continuous motion of the section in the forced vibration technique has been restricted to sinusoidal motions, which do not reflect the real bridge behavior.…”