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Showing 1 to 12 of 12 for “"steel moment frames"”.
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Performance Prediction and Evaluation of Low Ductility Steel Moment Frames for Seismic Loads
… due to story mechanism and high P-Delta moments. Therefore, it is recommended that WCSB design be restricted to 120 feet tall. All of the buildings with T-stub connections performed well except for the 3-story building in SDC D which exceeded the permanent residual drift limit. As was …
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Effects of residual stresses and initial imperfections on earthquake response of steel moment frames
… parameters on the seismic behavior of typical steel buildings before the DM is required for seismic design. To examine these issues, a series of steel special moment-resisting frame models were subjected to monotonic pushover, cyclic pushover and response history analyses. The observed behavior …
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Influence of the Gravity System on the Seismic Performance of Special Steel Moment Frames
… system on the collapse performance of Special Steel Moment Frames (SMFs). The influence was quantified using the FEMA P-695 methodology. The buildings used for this study were a 2-, 4- and 8-story SMFs taken from the ATC76-1 project where their collapse performance was already evaluated without …
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Seismic Rehabilitation of Steel Moment Frames Vulnerable to Soft-Story Failures Through Implementation of Rocking Cores
<p>During seismic events, inefficient steel moment frame building systems may exhibit soft-story failures. This thesis focuses on development and validation of a seismic retrofit strategy for avoiding soft-story failures in low-rise and mid-rise steel moment frame buildings. The considered retrofit …
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Analytical and Experimental Investigation of Improving Seismic Performance of Steel Moment Frames Using Synthetic Fiber Ropes
… fiber rope for providing improved performance of steel moment frames subjected to earthquake-induced ground motions. A series of experimental tests, including a 1:3-scale dynamic test and 1:6-scale shaking table tests, was conducted using Northridge ground-motion input. A series of nonlinear …
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Using Incremental Dynamic Analysis to Visualize the Effects of Viscous Fluid Dampers on Steel Moment Frame Drift
… dampers in controlling the interstory drift in steel moment frames, and the use of incremental dynamic analysis as a method of visualizing the behavior of these moment frames when subjected to seismic load effects. Models of three story and nine story steel moment frames were designed to meet …
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Stability Sensitivity Of Low-Rise Steel-Moment Framed Buildings To Hazard-Independent Damage
… to its system. Stability of low-rise steel-moment framed buildings and their sensitivity to perturbations from significant damage are the focus of this work. Perturbations, or changes from the normal state of the structural system, have the ability to affect the structural response. …
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Hybrid Steel Frames
… This research introduces two new structural steel systems: hybrid Buckling Restrained Braced Frames (BRBF) and hybrid steel Moment Frames (MF). The "hybrid" term for the BRBF system comes from the use of different steel material including carbon steel (A36), high-performance steel (HPS) and …
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Evaluating the Fracture Potential of Steel Moment Connections with Defects and Repairs
Steel moment frames are a popular seismic-force resisting system, but it is believed that they are susceptible to early fracture if there is a stress concentration in the plastic hinge region, also known as the protected zone. If a defect is present in this area, it may be repaired by grinding …
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Forced Vibration Testing and Analysis of Pre- and Post- Retrofit Buildings
… were comprised of concrete shearwalls and steel moment frames in the north/south direction and moment frames in the east/west direction. The retrofit strengthened the moment connections and added braces to the perimeter walls in the east/west direction.</p> <p> The natural frequencies were …
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Estudio numérico de conexiones tipo End-Plate conectadas por eje débil en columnas tipo Wide-Flange
… en base a elementos finitos de una conexión a momento tipo End-Plate , la cual consiste en una placa de acero soldada a la sección transversal de la viga, donde la unión se produce al apernar la placa a la columna solo que en este caso la placa se conectará a una plancha unida a placas de …
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Behavior and performance of steel moment-framed buildings subject to dynamic column loss scenarios
… progressive collapse, structural columns in steel buildings are particularly susceptible to initiating this behavior if their load-carrying capacity is compromised. Steel-framed buildings can possess the capacity to bridge over a single lost column and arrest collapse, but the dynamic and …