Undegraded Nonlinear Inelastic Shear Stress vs. Strain Characteristics for Soil Deposits at the Sites of Three Freeway Structures that Collapsed During the Earthquake

Information

• NSF Award
• 9416175

Owner

• Dynamic In Situ Geotechnical Testing Inc

• Award Id

  9416175

• Award Effective Date

  9/15/1994 - 30 years ago

• Award Expiration Date

  8/31/1997 - 27 years ago

• Award Amount

  $ 78,000.00

• Award Instrument

  Continuing grant

9416175 Henke The aim of this project is to help advance the Nation's ability to engineer freeway structures to resist earthquakes. The main objective is to provide detailed information on in situ undegraded nonlinear inelastic shear stress vs strain characteristics for the soil deposits at the sites of the three freeway structures that collapsed during the 1994 Northridge earthquake. The information is expected to be of value to analytical investigations aimed at identifying the roles of soil conditions in the collapses. The sites are the I-5/Highway 14 Interchange, Highway 118 close to Woodley, and I-10 at La Cienega. Local soil conditions may have amplified ground motions at these sites. The main feature of the project is that uncertainty caused by test- related disturbances to in situ conditions is expected to be held to a relatively low level. Data is to be measured using a field prototype simplified in situ torsional cylindrical impulse shear testing system currently being constructed for the Federal Highway administration (FHwA). This method provides detailed information on in situ undegraded nonlinear inelastic shear stress vs strain characteristic for soil deposits. The method addresses the well known, but not yet fully-resolved, problem of obtaining detailed information on the soil characteristics of interest without disturbing in situ conditions excessively. This problem can cause considerable uncertainty in the results of earthquake analyses. This project is being co-funded with the FHwA. ***

• Program Officer

  Clifford J. Astill

• Min Amd Letter Date

  9/26/1994 - 30 years ago

• Max Amd Letter Date

  3/1/1996 - 28 years ago

• ARRA Amount

• Name

  Dynamic In Situ Geotechnical Testing Inc

• City

  Baltimore

• State

  MD

• Country

  United States

• Address

  7 Wytchwood Court, #T1

• Postal Code

  212094844

• Phone Number

  4104155903

• First Name

  Wanda

• Last Name

  Henke

• Email Address

  whenke@home.com

• Start Date

  9/15/1994 12:00:00 AM

• First Name

  Robert

• Last Name

  Henke

• Start Date

  9/15/1994 12:00:00 AM

• Name

  Earthquake

• Code

  304010

• Name

  Engineering-Civil

• Code

  54