2,246 Works

Site 6 Rapid Impact Compaction test pad crosshole tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
A 3-component receiver is pushed into ground by T-Rex at various depths to measure the ground motion from two source rods on two side of the receiver. Source rods were pushed into ground by mobile CPT ramps. Note: Data is not provided in engineering units because analysis is performed using raw voltage signal to identify arrival of compression and shear waves.

Prototype MR Damper Characterization Tests Using White Noise

Shirley Dyke
Perform tests at 2 amplitudes, 2 frequency ranges, and 2 voltage ranges. Five trials are conducted to provide data intended for MR damper characterization and modeling. The two inputs to the MR Damper are the displacement and the voltage, and the output is the measured force. In each trial displacement input to the MR damper using a hydraulic actuator. The actuator command is a white noise input. The file for each trial contains displacement input...

Site 3 Rapid Impact Compation test pad liquefaction tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
Four 2D geophone sensors and five PPTs are pushed into the ground at varying depths according to a general sensor layout. The vibroseis T-Rex is used to cyclicly load the ground with 100 cycles in staged loading trials with forces ranging from 3,000 to 30,000 lbs. The sensors measured the ground response to cyclic loading with regard to ground motion and the development of water pressure.

Site 3 Rammed Aggregate Piers test pad crosshole tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
A 3-component receiver is pushed into ground by T-Rex at various depths to measure the ground motion from two source rods on two side of the receiver. Source rods were pushed into ground by mobile CPT ramps. Note: Data is not provided in engineering units because analysis is performed using raw voltage signal to identify arrival of compression and shear waves.

Site 4 #1 Rammed Aggregate Piers test pad crosshole tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
A 3-component receiver are pushed into ground by T-Rex and CPT ramp at various depths to measure the ground motion from center source rod. Source rod was pushed into ground by mobile CPT ramp. Note: Data is not provided in engineering units because analysis is performed using raw voltage signal to identify arrival of compression and shear waves.

Site 4 #7 Timber test pad crosshole tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
A 3-component receiver are pushed into ground by T-Rex and CPT ramp at various depths to measure the ground motion from center source rod. Source rod was pushed into ground by mobile CPT ramp. Note: Data is not provided in engineering units because analysis is performed using raw voltage signal to identify arrival of compression and shear waves.

Site 4 #8 Rapid Impact Compaction test pad liquefaction tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
Four 2D geophone sensors and five PPTs are pushed into the ground at varying depths according to a general sensor layout. The vibroseis T-Rex is used to cyclicly load the ground with 100 cycles in staged loading trials with forces ranging from 3,000 to 30,000 lbs. The sensors measured the ground response to cyclic loading with regard to ground motion and the development of water pressure.

Specimen 02: Steel cruciform specimen (seat configuration) subjected to in plane pseudo-static cyclic reverse lateral loading.

Carlos Gordo, Eduardo Miranda & Sophie Zhang
This experiment is of a half-scale steel (ASTM A992 Grade 50) cruciform beam-column subassemblage comprised of a column and 2 half length beams at either end of the column. Specimen 2 uses the seated-type enhanced gravity connection that was developed as part of this research project. The specimen was loaded quasi-statically using a modified version of the FEMA 461 loading protocol up to drifts of 9%. The objective was to evaluate the hysteretic behavior and...

Site 4 #15 Double Row of Beams test pad liquefaction tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
Four 2D geophone sensors and five PPTs are pushed into the ground at varying depths according to a general sensor layout. The vibroseis T-Rex is used to cyclicly load the ground with 100 cycles in staged loading trials with forces ranging from 3,000 to 30,000 lbs. The sensors measured the ground response to cyclic loading with regard to ground motion and the development of water pressure.

Site 4 #16, #18 Unimproved Ground test pad crosshole tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
A 3-component receiver is pushed into ground by T-Rex at various depths to measure the ground motion from source rod. Source rod was pushed into ground by mobile CPT ramp. Note: Data is not provided in engineering units because analysis is performed using raw voltage signal to identify arrival of compression and shear waves.

LG-1: Full Scale Level Ground Large Scale Shaking Test on loose sand deposit

Sabanayagam Thevanayagam, Ricardo Dobry, Tarek Abdoun, Ahmed Elgamal, Mourad Zeghal, QIQI HUANG & Waleed Elsekelly
Test LG-1 involved a 5 m deep, loose saturated clean sand deposit constructed inside laminar box at the U. at Buffalo using a hydraulic fill technique. Box was imparted with input base motions of 0.015g, 0.02g, 0.03g and 0.1g provided as artificial sinusoidal motions using actuator assembly at University at Buffalo. Excess pore pressures and settlements in the sand deposit were recorded. The liquefaction in various areas of sand in the box was analyzed.

Base isolated/damping platforms for seismic protection of essential equipment - Hinge-Bearing Platform

Claudia Marin, XING HAN & Amdebrhan Asfaw
One isolation platform, consisting of four hinge-bearings supporting one horizontal steel frame that in turn supports a mass that simulates the self-weight of a piece of equipment was tested. Each hinge-bearing consists of an elastomeric bearing atop of a hinge joint. The hinge joint acts as an articulation connecting the elastomeric bearing and load cells that in turn are connected to the shake table. The hinge-bearing isolation system was provided by Seismic Foundation Control Inc....

System Test of a Base-Isolated Building with Gap Damper

Hamed Zargar & Keri Ryan
Shake table testing of a base-isolated building with a gap damper device was conducted at the NEES facility at University of Nevada, Reno. A 1/4 scale 3-story steel frame building with lead-rubber bearings and a gap damper device installed beneath the base of the building was subjected to a variety of motions. The system response was recorded using the following instruments: load cells to record the bearing forces and damper forces; string pots to record...

NCBF3-1: UW Non-Seismic Concentrically Braced Frame (NCBF) with Bolted Split Shear Tab and Non-Ductile HSS Brace

Molly Johnson, Charles Roeder, Dawn Lehman & Jeffrey Berman
This specimen consisted of a single-bay one-story concentrically braced frame with single-diagonal bracing. The frame was intended to be representative of existing non-seismic concentrically braced frames (NCBFs) with split bolted shear tab connections at brace-beam-column intersections. The braces and connections were deficient with respect to the 2010 AISC Seismic Provisions. The HSS brace did not meet the compactness limit for highly ductile members required for SCBFs (b/t = 22.8 > 13.2). Connection deficiencies included beam-to-shear...

33 to 56% Relative Density Cyclic Simple Shear Tests under Modulated Sine Loadings

Wing Kwan, Sam Sideras, Chadi El Mohtar & Steve Kramer
4-inch diameter and 1-inch height Nevada sand specimen was reconstituted by wet pluviation. Specimens were back and consolidated to an effective vertical stress of 100 kPa. A total of 19 modulated sine loading histories were scaled and applied. A summary of the input motions, relative density, height, diameter, and mass of the specimens can be found in the document of 'Exp7SummaryOfInputMotion.xlsx'. The test terminated after the entire ground motion history was applied or a single...

Procedure for obtaining frozen cores from liquefied crystal silica sand model(Experiment 2 Laminar Box)

Angel Gutierrez & Edward Kavazanjian
The purpose of this experiment is to develop a procedure for obtaining frozen core specimens from centrifuge tests. The attempt is to liquefy the soil prior to testing. In the first experiment, a rigid box was used. The changes from the first experiment to the second was the use of a laminar box that would allow shearing of the soil better than that of the rigid box. However, liquefaction was again not present, therefore the...

Hybrid Test #1 of the seismic response of a steel moment frame

Maikol Carpio & Gilberto Mosqueda
Half-scale hybrid tests of a 4-story steel moment frame building. The physical substructure include a subassembly of the moment-resisting frame constructed with the composite concrete slab. The one and one-half story physical substructure included additional dead load on the slab at the first story level with the vertical load from the upper stories accounting for overturning forces applied through force controlled actuators. The lateral loading on the frame was applied through displacement controlled actuators commanded...

Experiments #1, preliminary tests on moment frame specimen

Maikol Carpio & Gilberto Mosqueda
Four preliminary tests (PT01 series) were conducted prior to Hybrid Simulation-1 on the moment frame specimen. The first two preliminary tests, namely, PT01-01 and PT01-02, were conducted first to verify that (a) the displacement and force command vectors sent through OpenFresco were correctly applied by the actuators and (b) the feedback from strain gauges were properly transformed to obtain the force feedback vector. These tests were followed by two quasi-static tests, namely, PT01-03 and PT01-04,...

Experiments #2, preliminary tests on gravity frame test specimen

Maikol Carpio & Gilberto Mosqueda
Data from a set of four preliminary tests (PT02 test series) conducted prior to Hybrid Simulations 2 on the gravity frame and a cyclic test (Cyclic02 test) conducted at the end of the test series is provided here. The first two preliminary tests, namely, PT02-01 and PT02-02, were conducted first to quantify the flexibility of the support boundary conditions of the Physical Sub-Structure #2. In these tests, the physical sub-structure remained elastic with a maximum...

Shake table testing of out-of-plane URM wall - Wall A (flexible/flexible, 3-wythe)

Osmar Penner & Ken Elwood
A shake table test of an unreinforced masonry wall section spanning one floor. This experiment documents the testing of one specimen out of a total of five specimens tested in the project. Parameters varied among the specimens are wall height and the horizontal stiffness of the supports at the top and base of the walls. Each wall was tested by running a ground motion repeatedly at increasing amplitude until collapse was observed. Rigid-body rocking behaviour...

Site 4 SASW test

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
SASW tests at site 4 to obtain shear wave velocity profile for the 3D profiling inversion. Tests utilized the 3 geophones placed during the 3D profiling test. Sensor spacing of 60, 30, 18, 9, 6, 3, 2and 1 m are used in the SASW tests. Stepped-sine function provided by Quattro analyzer is used to drive T-Rex for the SASW tests. The final units used in analysis are the ratio V/V, which are the units provided...

Site 3 Unimproved Ground A test pad liquefaction tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
Four 2D geophone sensors and five PPTs are pushed into the ground at varying depths according to a general sensor layout. The vibroseis T-Rex is used to cyclicly load the ground with 100 cycles in staged loading trials with forces ranging from 3,000 to 30,000 lbs. The sensors measured the ground response to cyclic loading with regard to ground motion and the development of water pressure.

Site 3 Unimproved Ground B test pad crosshole tests

Kenneth H. Stokoe, Brady Cox, Julia Roberts & Sungmoon Hwang
A 3-component receiver is pushed into ground by T-Rex at various depths to measure the ground motion from source rod. Source rod was pushed into ground by mobile CPT ramp. Note: Data is not provided in engineering units because analysis is performed using raw voltage signal to identify arrival of compression and shear waves.

1/5 Scale Reinforced Concrete Infill Frame with Code Compliant Seismic Detailing, Frame 4

Cemalettin Donmez & M. Alper Cankaya
Fourth frame also had partition walls, however, code compliant reinforcement detailing is provided. Detailing was controlled by appropriate longitudinal/transverse reinforcement detailing and also by sufficient splice length for longitudinal column reinforcement. Static test procedure of fourth frame was followed as the previous frames. Target inter-story drift ratios of the fourth frame were 0.1%, 0.3%, 0.5%, 0.9%, 1.4%, 1.9% on the first story. Dynamic excitation is provided by a impact hammer after every cycle.

Cyclic Testing of an Unbonded Pre-tensioned Bridge Column with Rocking Detail: Capbeam Specimen

Bryan J. Kennedy, Travis Thonstad, Marc Eberhard & John Stanton
The seismic performance of the precast system was evaluated with a quasi-static test of one column-to-cap-beam sub-assembly. This column contained a steel dowel bar that extended down from the body of the column into the footing. The column-to-cap-beam subassembly had a cantilever height of 60 in. and a column diameter of 20 in (42% scale). The specimen was subjected to a constant axial Load of 159 kips and a quasi-static displacement history based on the...

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