Design and test of tuned liquid mass dampers for attenuation of the wind responses of a full scale building

A tuned liquid mass damper (TLMD) is proposed for bi-directional control of the wind responses of a building in orthogonal directions. It is a damper that behaves as a tuned liquid column damper (TLCD) and also as a tuned mass damper (TMD) in the orthogonal direction to the TLCD. Therefore, the TLMD provides the control performance of both a TLCD and a TMD. First, experiments are performed for the TLMD installed at angles on a uniaxial shaking table in order to describe bi-directional wind responses. The results reveal that independent TLCD and TMD behaviors are found, leading to the conclusion that the responses are controlled by one TLMD. Finally, a real size TLMD is manufactured and installed on the fifth floor of a full scale five story steel building. A hybrid mass driver (HMD) on the fourth floor is used as an exciter. Three tests are performed for the TLMD placed in the TMD direction, the TLCD direction and the coupled direction by rotating the TLMD by 45°. Independent TMD and TLMD behaviors are observed as found in the shaking table test. Therefore, it is concluded from the experiments that the new TLMD can control the bi-directional wind responses of a building by TLCD and TMD motions.

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