VShaker Metadata

VShaker Metadata

This page describes the information content used with VShaker system. The VShaker system is described in more detail on the Virtual Shaker pages. Detailed development information is posted on the IT web site at: [IT Site]

• What does the metadata file describe

We will use the idea of a data set. We will have one metadata file per data set. The metadata files should be constructed in a way that they can be aggregated without duplicating information. This is done in aggregrates through references to existing metadata files.

• Example of VShaker Datasets

VShaker datasets use a standard directory structure that includes

• Inputs
• Outputs

Simulation inputs include

• Original 3 component seismograms
• Acceleration input to Virtual Shaker
• decimated 3 component sesimograms
• trimmed seisomgrams
• acceleration trimmmed

Existing Automated Metadata

VShaker Metadata { 'Total Frames': 2000,

'Time Interval': 0.046,

'Structural Model Description': 'This building is located in Woodland Hills, within five miles of the epicenter of the 1994 Northridge earthquake. The east, west, and south moment frames lie on the perimeter of the building, while the north frame is located one bay inside of the perimeter. This gives rise to some torsional eccentricity. Many moment-frame beam-column connections in the building fractured during the Northridge earthquake, and the building has been extensively investigated since then by many engineering research groups (SAC 1995b, Carlson 1999). Detailed floor plans, beam and column sizes, and gravity, wind, and seismic loading criteria are given in Krishnan et al. 2005. A36 steel with nominal yield strength of 248.29 MPa, (36 ksi) is used for all beams, while A572 Grade 50 steel with nominal yield strength of 344.85 MPa (50 ksi) is used for all columns. The floors consist of lightweight concrete slab on metal deck supported by steel beams and girders framing into gravity and moment-frame columns. The model includes a probabilistic distribution to describe the fracture strain for fibers in the bottom-flanges of the moment frame beams.\n',

'Simulation ID': '20100910-122726',

'Earthquake Description': 'SCEC M8 San Andreas Earthquake Simulation: Northridge

\xc2\xa0# LON LAT UTM_E (m) UTM_N (m) OFFSET_E (m) OFFSET_N (m)

\xc2\xa0-118.531250 34.218750 386544.244357 4097025.437890 383817.979601 121914.266513

\n',

'Simulation Time': '12:27:26',

'Structural Model Name': '17-Story Canoga Building in Woodland Hills (Units = kip-in): LA Basin Study (Fracture Included)',

'Max Displacement': 'Node Color Mapping was OFF',

'Structural Motion': 'Absolute',

'Relative Motion Exaggeration': 5.0,

'Ground Motion Exaggeration': 5.0,

'GAMULTZ': 39.3701,

'Simulation Date': '2010-09-10',

'OBJ Scale Factor': 0.01,

'GAMULTY': 39.3701,

'Earthquake': ,

'GAMULTX': 39.3701 }