Development of deformable connection for earthquake-resistant buildings to reduce floor accelerations and force responses

Georgios Tsampras, Richard Sause, Dichuan Zhang, Robert B. Fleischman, Jose I. Restrepo, David Mar, Joseph Maffei

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Summary: This paper presents the development of a deformable connection that is used to connect each floor system of the flexible gravity load resisting system (GLRS) with the stiff lateral force resisting system (LFRS) of an earthquake-resistant building. It is shown that the deformable connection acts as a seismic response modification device, which limits the lateral forces transferred from each floor to the LFRS and allows relative motion between the GLRS and LFRS. In addition, the floor accelerations and the LFRS story shears related to the higher-mode responses are reduced. The dispersion of peak responses is also significantly reduced. Numerical simulations of the earthquake response of a 12-story reinforced concrete shear wall example building with deformable connections are used to define an approximate feasible design space for the deformable connection. The responses of the example building model with deformable connections and the example building model with rigid-elastic connections are compared. Two configurations of the deformable connection are studied. In one configuration, a buckling restrained brace is used as the limited-strength load-carrying hysteretic component of the deformable connection, and in the other configuration, a friction device is used. Low damping laminated rubber bearings are used in both configurations to ensure the out-of-plane stability of the LFRS and to provide post-elastic stiffness to the deformable connection. Important experimental results from full-scale tests of the deformable connections are presented and used to calibrate numerical models of the connections.

Original languageEnglish
JournalEarthquake Engineering and Structural Dynamics
DOIs
Publication statusAccepted/In press - 2016

Fingerprint

Earthquakes
earthquake
Gravitation
Bearings (structural)
gravity
Shear walls
buckling
Seismic response
seismic response
reinforced concrete
rubber
damping
Buckling
Reinforced concrete
stiffness
Numerical models
Rubber
friction
Damping
Stiffness

Keywords

  • Buckling restrained brace
  • Deformable connection
  • Floor accelerations
  • Friction device
  • Higher-mode responses
  • Low damping laminated rubber bearings

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Geotechnical Engineering and Engineering Geology

Cite this

Development of deformable connection for earthquake-resistant buildings to reduce floor accelerations and force responses. / Tsampras, Georgios; Sause, Richard; Zhang, Dichuan; Fleischman, Robert B.; Restrepo, Jose I.; Mar, David; Maffei, Joseph.

In: Earthquake Engineering and Structural Dynamics, 2016.

Research output: Contribution to journalArticle

Tsampras, Georgios ; Sause, Richard ; Zhang, Dichuan ; Fleischman, Robert B. ; Restrepo, Jose I. ; Mar, David ; Maffei, Joseph. / Development of deformable connection for earthquake-resistant buildings to reduce floor accelerations and force responses. In: Earthquake Engineering and Structural Dynamics. 2016.
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AB - Summary: This paper presents the development of a deformable connection that is used to connect each floor system of the flexible gravity load resisting system (GLRS) with the stiff lateral force resisting system (LFRS) of an earthquake-resistant building. It is shown that the deformable connection acts as a seismic response modification device, which limits the lateral forces transferred from each floor to the LFRS and allows relative motion between the GLRS and LFRS. In addition, the floor accelerations and the LFRS story shears related to the higher-mode responses are reduced. The dispersion of peak responses is also significantly reduced. Numerical simulations of the earthquake response of a 12-story reinforced concrete shear wall example building with deformable connections are used to define an approximate feasible design space for the deformable connection. The responses of the example building model with deformable connections and the example building model with rigid-elastic connections are compared. Two configurations of the deformable connection are studied. In one configuration, a buckling restrained brace is used as the limited-strength load-carrying hysteretic component of the deformable connection, and in the other configuration, a friction device is used. Low damping laminated rubber bearings are used in both configurations to ensure the out-of-plane stability of the LFRS and to provide post-elastic stiffness to the deformable connection. Important experimental results from full-scale tests of the deformable connections are presented and used to calibrate numerical models of the connections.

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