Third Progress Report on Racking Tests of Wall Panels.

Freeman, Sigmund A.

doi:10.2172/4663288

Cited by 8 publications

(3 citation statements)

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“…The type of building being examined in this study is intended to represent a typical steel-framed structure with concrete on metal deck floor system. Relatively limited data is No connection between the gypsum board panels or the metal studs to the bottom track (Blume 1966, Blume 1968, Freeman 1971, Rihal 1980; the shear transfer is due solely to friction 2…”

Section: Simple Shear Beam-to-column Connectionsmentioning

confidence: 99%

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Residual Drifts of Self-Centering Systems Including Effects of Ambient Building Resistance

2011

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There has been widespread interest in the development and use of self-centering (SC) lateral resisting systems that eliminate residual drifts after large earthquakes. SC systems often include a restoring force component and a component that dissipates seismic energy. Typically, it is assumed that the criterion for self-centering is satisfied if the restoring force is proportioned to be greater than the force required to yield the energy dissipating component. A parametric SDOF study was conducted using time-history analyses on several prototype buildings to quantify the effect of varying system parameters on structural response including residual drifts. The ambient resistance of the rest of the building was considered, as well as proportioning the system with less restoring force than the yield capacity of the dissipative component. In addition, the probabilistic mechanism that creates a propensity for reducing residual drifts in systems with little or no restoring force is explored and quantified. It was found that a restoring force that is at least one-half of the force required to yield the dissipative component will still reliably eliminate residual drifts in a non-softening system.

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Section: Simple Shear Beam-to-column Connectionsmentioning

confidence: 99%

“…The studs are attached to the track with either rivets or screws, but the gypsum board panels are not attached to top or bottom track (Blume 1966, Blume 1968, Freeman 1971; some amount of shear wall action is realized 3…”

Section: Simple Shear Beam-to-column Connectionsmentioning

confidence: 99%

Residual Drifts of Self-Centering Systems Including Effects of Ambient Building Resistance

2011

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“…The seismic behavior of gypsum partition walls has been assessed since the late 1960s by several experimental studies. One of the first testing programs was developed by John A. Blume and Associates (Freeman 1971, 1974, John A. Blume and Associates 1966, 1968), which established two damage thresholds: (1) “First Noticeable Damage,” which is when there is only damage to the panels; and (2) “Real Damage,” which is when there is damage to the frame. These tests were subsequently used by Kustu et al (1982) to develop fragility functions for Threshold Damage State 1, the story drift at the first sign of damage, and Threshold Damage State 2, the story drift at which significant repair work is required.…”

Section: Introductionmentioning

confidence: 99%

Development and Testing of a Friction/Sliding Connection to Improve the Seismic Performance of Gypsum Partition Walls

2019

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Observed earthquake damage, laboratory tests, and loss analyses have shown gypsum partition walls to be susceptible to earthquake damage under small story drift ratios, which can result in large losses under design earthquake ground motions. To mitigate this risk, a new friction/sliding connection is proposed that can minimize or prevent damage to partition walls for story drift ratios of 1% or more. The proposed friction/sliding connection isolates the partition wall from the structure while providing sufficient resistance to support out-of-plane forces on the wall induced by inertial effects. Test results of three prototype connections and two full-scale wall partition specimens, with and without the friction connection detail, are summarized to demonstrate the improved performance that can be achieved with the proposed friction/sliding connection. Whereas the test of the conventional wall specimen began experiencing damage at 0.1 to 0.3% story drift ratio, the wall specimen with the connection could undergo drifts up to about 1.5% without any damage.

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Use of probability‐based measures for automated damage assessment

Miranda¹

2006

Structural Design Tall Build

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The use of component fragility functions for automatic damage assessment in instrumented buildings is described. Fragility functions used in this study provide a probabilistic mapping between peak structural response parameters and various levels of damage. The approach permits the estimation of damage in various types of components for each story of a building. Two types of fragility functions are used. The first permits the estimation of the probability of being in a certain damage state with knowledge on the level of maximum interstory drift ratio. The second permits the estimation of damage in acceleration‐sensitive components by providing estimates of the probability of being in a certain damage state with knowledge on the level of maximum peak floor acceleration. Calculation of the probability of reaching or exceeding a certain damage state as well as of being in a certain damage state are described. An example of a two‐story building is used to illustrate the use of the proposed approach. Copyright © 2006 John Wiley & Sons, Ltd.

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Third Progress Report on Racking Tests of Wall Panels.

Cited by 8 publications

References 0 publications

Residual Drifts of Self-Centering Systems Including Effects of Ambient Building Resistance

Residual Drifts of Self-Centering Systems Including Effects of Ambient Building Resistance

Development and Testing of a Friction/Sliding Connection to Improve the Seismic Performance of Gypsum Partition Walls

Use of probability‐based measures for automated damage assessment

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