VIBRATION CONTROL RENOVATION CONSTRUCTION METHOD OF EXISTING MULTISTORY BUILDING

摘要

PROBLEM TO BE SOLVED: To provide a construction method for performing easy and secure vibration-control renovation on an existing multistory building. SOLUTION: The existing earthquake-proof element 1 of the low floor level is removed by making the low floor level of the existing multistory building an object to be renovated, and a vibration control mechanism 2 is installed. The number of stories n of the low floor levels to be renovated is set between or equal to 7% and 20% of the number of stories of the entire multistory building, and the story rigidity of the low floor levels to be renovated is made smaller than that of the non-renovated floor level which is directly above the low floor levels to be renovated. The damping coefficient ciof the damping element of the vibration control mechanism installed on the low floor level to be renovated is set within the range of ci=(5 to 25)nf1Mibased on the mass Miwhich the low floor level supports and the primary natural frequency of vibration f1of the building. An oil damper 3 and an inertial mass damper 4 are used in combination with each other as a vibration control mechanism installed on the low floor level to be renovated, and the inertial mass ψiof the inertial mass damper is set within the range of ψi=(0.5 to 2.0)Mi. COPYRIGHT: (C)2011,JPO&INPIT