Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"residual drift"”.
-
Performance Prediction and Evaluation of Low Ductility Steel Moment Frames for Seismic Loads
… building in SDC D which exceeded the permanent residual drift limit. As was seen from the measured moment-rotation behavior of the connection, the end-plate connection behaves very similar to the fully restrained connections. Therefore, the connection is expected to perform very well based on …
-
Innovative techniques for seismic-resistant bridge columns under ground motion excitations
… conventional column; especially regarding the residual drift. The peak drift for the posttensioned columns was 8.85% with a residual drift of 0.08% compared to 4.8% peak drift with 1.5% residual drift for the conventional column. Three-dimensional finite element models for the post-tensioned …
-
Seismic Performance of Square Nickel-Titanium Reinforced ECC Columns with Headed Couplers
… damage to column plastic hinges and minimizing residual drifts. These objectives can be accomplished by using innovative materials such as Nickel-Titanium shape memory alloy bars (SMA) and engineered cementitious composites (ECC). This study focused on evaluating the performance of SMA/ECC in …
-
Sub-femtosecond optical timing distribution for next-generation light sources
… for eliminating polarization-induced timing drifts. The link is then enhanced to achieve state-of-the-art timing distribution across a 4.7-km fiber network with 0.58 fs RMS residual drift for over 52 hours. For a complete end-to-end TDS, a remote laser is stabilized at the output of a 3.5 km …
-
Development and experimental validation of self-centering buckling-restrained braces with shape memory alloy
… seismic energy. The structural damage and the residual drift that may result from the inelastic response can make a building difficult, if not financially unreasonable, to repair after an earthquake. As a result, development of systems that return to their initial position (i.e., “self-center”) …
-
Analytical and Experimental Investigation of Improving Seismic Performance of Steel Moment Frames Using Synthetic Fiber Ropes
… of the steel moment frames. Maximum and residual drift were reduced significantly, with a corresponding minimal increase to the maximum base shear. Base shear was reduced at several peaks subsequent to the initial pulse of the Northridge ground-motion input. The analytical model developed …
-
Performance Assessment of Seismic Resistant Steel Structures
… of the behavior is needed. The influence of residual drifts on the proximity to collapse is determined, and this work concludes that a residual drift check is unnecessary if the only limit state of interest is collapse prevention. This study also finds that spectrally matched ground motions …
-
Experimental and Computational Investigation of a Self-Centering Beam Moment Frame (SCB-MF)
… has been developed that virtually eliminates residual drifts and concentrates the majority of structural damage in replaceable fuse elements. The SCB consists of a I-shaped steel beam augmented with a restoring force mechanism attached to the bottom flange and can be shop fabricated. …
-
Probabilistic seismic demand models of RC bridge columns retrofitted with shape memory alloy spirals
… columns is assessed using 4 DM including maximum drift, residual drift, an energy-based concrete damage index and a steel damage index based on low-cycle fatigue. The suitability of 8 IMs for the development of probabilistic demand models to predict the DMs is explored. The optimal IM, which …
-
Large-Scale Cyclic and Hybrid Simulation Testing and Development of a Controlled-Rocking Steel Building System with Replaceable Fuses
… throughout the building and permanent drifts after the earthquake motion ceases which can make the structure difficult if not financially unreasonable to repair. A controlled rocking system has been developed which virtually eliminates residual drifts and concentrates the majority of …
-
Enhancement of the Sliding Hinge Joint Connection with Belleville Springs
… properties so that the post-earthquake residual drift of the building is sufficiently low not to require remedial straightening. Subsequent research under the supervision of Charles Clifton has shown that the post sliding strength and stiffness of the SHJ connection developed by Clifton …