论文信息 - A seismic retrofit method by connecting viscous dampers for microelectronics factories

A seismic retrofit method by connecting viscous dampers for microelectronics factories

The implementation of viscous dampers to microelectronics factories has been previously proved not to affect the micro-vibration of the factories in operation so that the vibration-sensitive manufacturing process will not be interfered. Therefore, a seismic retrofit strategy which employs the viscous dampers installed in between the exterior and interior structures of the ‘fab’ structure is proposed in the study. The design formulas corresponding to the proposed retrofit method are derived using the non-proportional damping theory. Based on the study, it is found that the added damping ratio to the fab structure depends greatly on the frequency ratio of the two structures in addition to the damping coefficients of the added dampers. Outside the bandwidth of the frequency ratio in which the added damping ratio is very sensitive to the variation of the frequency ratio, the added damping ratio can be well captured using the classical damping theory. Copyright © 2007 John Wiley & Sons, Ltd.

Shiang-Jung Wang | J. S. Hwang | J. S. Hwang | Yin-Nan Huang | Jay-Fu Chen

[1] Yl L. Xu,et al. Dynamic characteristics and seismic response of adjacent buildings linked by discrete dampers , 1999 .

[2] J. S. Hwang,et al. Composite damping ratio of seismically isolated regular bridges , 1997 .

[3] Jm M. Ko,et al. Experimental investigation of adjacent buildings connected by fluid damper , 1999 .

[4] Yl L. Xu,et al. Dynamic response of damper-connected adjacent buildings under earthquake excitation , 1999 .

[5] Masato Abe,et al. Tuned mass dampers for structures with closely spaced natural frequencies , 1995 .

[6] J. S. Hwang,et al. Applicability of Seismic Protective Systems to Structures with Vibration-Sensitive Equipment , 2004 .

[7] C. Ventura,et al. MODAL ANALYSIS OF NON-CLASSICALLY DAMPED LINEAR SYSTEMS , 1986 .

[8] R. S. Jangid,et al. Seismic analysis of structures connected with friction dampers , 2006 .

[9] J. S. Hwang,et al. Design formulations for supplemental viscous dampers to highway bridges , 2005 .

[10] J. Enrique Luco,et al. Optimal damping between two adjacent elastic structures , 1998 .

[11] John O Sobanjo,et al. Use of a shared tuned mass damper (STMD) to reduce vibration and pounding in adjacent structures , 2001 .

[12] Vitelmo V. Bertero. Observations on Structural Pounding , 1987 .

[13] Colin G. Gordon. Generic criteria for vibration-sensitive equipment , 1992, Other Conferences.

[14] Kazuhiko Kasai,et al. Dynamics of pounding when two buildings collide , 1992 .