TY - CHAP
T1 - IMPROVING THE SEISMIC PERFORMANCE OF STRUCTURES BY ASSIGNING CHANGES IN MASS, STIFFNESS AND ADDED DAMPING
AU - Shmerling, A.
AU - Levy, R.
N1 - Publisher Copyright:
© The 17th World Conference on Earthquake Engineering.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - This paper presents a two-stage seismic design methodology for improving the seismic performance of multi-story frame structures by assigning changes in floor-mass, changes in horizontal-stiffness, and added linear viscous dampers. In the first stage, use is made of the general system interconnection paradigm that represents the linearity between the ground acceleration and absolute accelerations, together with the modified H∞ synthesis, to attain optimal stiffness and mass changes. The modified H∞ synthesis is based on the analogy between the H∞ norm and the square sum of the squares (SRSS) of the peak absolute acceleration gains in the frequency domain. In the second stage, the analysis-redesign approach for the fully stressed design of linear viscous dampers is introduced to limit the maximum interstory drifts to their prescribed allowable limits. An example of a 5-story shear-type building is studied. Optimal changes are obtained to show significant improvement in seismic performance. The results clearly indicate the efficiency of the proposed methodology that possesses the capability of attaining optimal changes in all the structure’s physical characteristics, while reducing absolute accelerations and limiting the maximum interstory drifts.
AB - This paper presents a two-stage seismic design methodology for improving the seismic performance of multi-story frame structures by assigning changes in floor-mass, changes in horizontal-stiffness, and added linear viscous dampers. In the first stage, use is made of the general system interconnection paradigm that represents the linearity between the ground acceleration and absolute accelerations, together with the modified H∞ synthesis, to attain optimal stiffness and mass changes. The modified H∞ synthesis is based on the analogy between the H∞ norm and the square sum of the squares (SRSS) of the peak absolute acceleration gains in the frequency domain. In the second stage, the analysis-redesign approach for the fully stressed design of linear viscous dampers is introduced to limit the maximum interstory drifts to their prescribed allowable limits. An example of a 5-story shear-type building is studied. Optimal changes are obtained to show significant improvement in seismic performance. The results clearly indicate the efficiency of the proposed methodology that possesses the capability of attaining optimal changes in all the structure’s physical characteristics, while reducing absolute accelerations and limiting the maximum interstory drifts.
KW - Acceleration Reduction
KW - Changes in Mass and Stiffness
KW - Optimal Damper Placement
KW - Seismic Design
UR - https://www.scopus.com/pages/publications/105027850313
M3 - Chapter
AN - SCOPUS:105027850313
T3 - World Conference on Earthquake Engineering proceedings
BT - World Conference on Earthquake Engineering proceedings
PB - International Association for Earthquake Engineering
ER -