BI-AXIAL SEISMIC ACTIVATION OF CIVIL ENGINEERING STRUCTURES EQUIPPED WITH TUNED LIQUID COLUMN DAMPERS

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REITERER M.; ZIEGLER F.

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Journal Paper

Paper Information

Journal: Journal of Seismology and Earthquake Engineering Year:2005 | Volume:7 | Issue:1 Page(s): 45-60

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Title

BI-AXIAL SEISMIC ACTIVATION OF CIVIL ENGINEERING STRUCTURES EQUIPPED WITH TUNED LIQUID COLUMN DAMPERS

Author(s)

REITERER M. | ZIEGLER F. | Issue Writer Certificate

Keywords

VIBRATION ABSORBERQ4

HORIZONTAL-Q4

VERTICAL EXCITATIONSQ4

PARAMETRIC RESONANCEQ4

CUT-OFF DAMPINGQ4

BERNOULLI EQUATIONQ4

TUNED MASS DAMPER (TMD)-ANALOGYQ4

DEN HARTOG TUNINGQ4

STATE SPACE OPTIMIZATIONQ4

Abstract

Tuned liquid column dampers (TLCD) considerably increase the effective damping of vibration prone civil engineering structures in horizontal motion. A single-degree-of-freedom (SDOF) basic system with a TLCD attached is analyzed under horizontal and vertical base excitations in order to prove its sensitivity with respect to the vertical parametrical forcing. The main result is cast in a sufficient condition for the linearized damping coefficient of the fluid motion to ensure its stability under the most critical, time harmonic forcing conditions. The output of computer simulations when varying the damping of the TLCD tuned with respect to frequency only, are verified experimentally by means of a novel model setup. The scaled Friuli 1976 earthquake is applied horizontally and vertically to an SDOF-shear frame with optimally tuned TLCD. A three-DOF-benchmark structure, equipped with two passive TLCD in parallel connection, optimally fine-tuned in state space, is analyzed by nonlinear computer modeling. Two different relevant earthquakes are alternatively applied in both, horizontal and vertical directions. In all cases it is verified, that sealed TLCD, (with the air-spring effect taken into account) are stable, since the optimal linear damping coefficient exceeds by far the required cut-off value of PARAMETRIC RESONANCE: the vertical component of the earthquake load remains ineffective. Hence, taking into account this sufficient condition with the maximum vertical ground (floor) acceleration assigned and the maximum amplitude of the fluid motion estimated, saves the consideration of the vertical seismic activation at all.

Cites

BRIDGE VIBRATIONS EFFECTIVELY DAMPED BY MEANS OF TUNED LIQUID COLUMN GAS DAMPERS

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APA: Copy

REITERER, M., & ZIEGLER, F.. (2005). BI-AXIAL SEISMIC ACTIVATION OF CIVIL ENGINEERING STRUCTURES EQUIPPED WITH TUNED LIQUID COLUMN DAMPERS. JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING, 7(1), 45-60. SID. https://sid.ir/paper/112336/en

Vancouver: Copy

REITERER M., ZIEGLER F.. BI-AXIAL SEISMIC ACTIVATION OF CIVIL ENGINEERING STRUCTURES EQUIPPED WITH TUNED LIQUID COLUMN DAMPERS. JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING[Internet]. 2005;7(1):45-60. Available from: https://sid.ir/paper/112336/en

IEEE: Copy

M. REITERER, and F. ZIEGLER, “BI-AXIAL SEISMIC ACTIVATION OF CIVIL ENGINEERING STRUCTURES EQUIPPED WITH TUNED LIQUID COLUMN DAMPERS,” JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING, vol. 7, no. 1, pp. 45–60, 2005, [Online]. Available: https://sid.ir/paper/112336/en

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