Download or read book Seismic Performance Assessment of Multi storey Buildings with Cold Formed Steel Shear Wall Systems written by Joel Martinez Martinez and published by . This book was released on 2008 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance of Multi storey Structures Designed with Cold formed Steel Wood Sheathed Shear Walls written by Denise Morello and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance of Multi storey Structures with Cold formed Steel Wood Sheathed Shear Walls written by Denise Morello and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance Assessment of Buildings written by Applied Technology Council and published by . This book was released on 2012 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance Assessment of Buildings Expected seismic performance of code conforming buildings written by and published by . This book was released on 2018 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance and Design of Steel Plate Shear Walls with Low Yield Point Steel Infill Plates written by Tadeh Zirakian and published by . This book was released on 2013 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel plate shear walls (SPSWs) have been frequently used as the primary or part of the primary lateral force-resisting system in design of low-, medium-, and high-rise buildings. Their application has been based on two different design philosophies as well as detailing strategies. Stiffened and/or stocky-web SPSWs with improved buckling stability and high seismic performance have been mostly used in Japan, which is one of the pioneering countries in design and application of these systems. Unstiffened and slender-web SPSWs with relatively lower buckling and energy dissipation capacities, on the other hand, have been deemed as a rather economical alternative and accordingly widely used in the United States and Canada. Development and use of low yield point (LYP) steel with considerably low yield stress and high elongation capacity provides the possibility to combine merits of these two distinctive design strategies, and consequently result in rather cost-effective and high-performing SPSW systems. Although some reported studies have demonstrated the advantages of LYP steel shear walls, various aspects of structural and seismic characteristics of these systems have not been investigated thoroughly. In particular, the linkage between structural specifications and seismic performance and pathway to performance-based design of these systems are largely undeveloped. Hence, systematic investigations are required to facilitate the seismic design and prevalent application of such promising lateral force-resisting and energy dissipating systems. Although some reported studies have demonstrated the advantages of LYP steel shear walls, various aspects of structural and seismic characteristics of these systems have not been investigated thoroughly. In particular, the linkage between structural specifications and seismic performance and pathway to performance-based design of these systems are largely undeveloped. Hence, systematic investigations are required to facilitate the seismic design and prevalent application of such promising lateral force-resisting and energy dissipating systems. The main objectives of this research are to evaluate the structural behavior and seismic performance of unstiffened LYP steel shear wall systems in a rather comprehensive manner. To achieve these objectives, element-level investigations on steel plates, component-level investigations on SPSW panels, and system-level investigations on multi-story steel frame-shear wall structures are performed in a hierarchical and systematic manner. Through detailed element- and component-level investigations, it is shown that employment of LYP steel infill plates in SPSW systems facilitates the design and effectively improves the buckling stability, serviceability, and energy absorption capacity of such lateral force-resisting systems. Some practical design tools and recommendations are also provided through analytical and numerical studies. In system-level investigations, the effectiveness of use of LYP steel material in design and retrofit construction is demonstrated through nonlinear time-history analysis as well as seismic response and performance assessment of multi-story structures subjected to earthquake ground motions representing various hazard levels. Ultimately, the fragility methodology is utilized by developing appropriate fragility functions for probabilistic seismic performance and vulnerability assessment of structures designed and retrofitted with conventional and LYP steel infill plates. The results of this study are indicative of relatively lower damage probability and superior seismic performance of LYP steel shear wall systems.
Download or read book Seismic Evaluation of a 2 story Cold formed Steel Framed Building Using ASCE 41 17 written by Matthew S. Speicher and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this report is to assess the adequacy of new provisions in ASCE 41 for seismic assessment of cold-formed steel framed buildings. A two-story cold-formed steel (CFS) framed building that has been designed to contemporary seismic standards (ASCE 7 and AISI S400) and tested on a shake table was selected as the archetype building for this study. Shake table tests of the CFS-framed building indicated only minimal damage at earthquake levels exceeding the ASCE 7 maximum considered earthquake. Further, previously conducted incremental dynamic analyses of the CFS-framed building indicated the ASCE 7 design led to acceptable collapse margin ratios, which equates to acceptable performance. Assessment of the selected CFS-framed building is performed per the linear procedure in ASCE 41. A retrofit design, and a new design, for the same CFS-framed building are also completed per ASCE 41. The ASCE 41 assessment indicates that the building is inadequate, despite the known good performance in experimental shaking and complementary nonlinear time history analyses. The ASCE 41 retrofit requires nearly a doubling in the strength of the shear walls and the remaining elements of the seismic force resisting system. It is shown that ASCE 41 s predicted demands for short period buildings, and its lack of a simple means to account for large system overstrength, are the two primary contributors to the overly-conservative predictions from the ASCE 41 provisions. These findings are intended to be used to improve future versions of ASCE 41, with a focus on CFS-framed building provisions.
Download or read book Seismic Performance Assessment of Buildings Implementation guide written by and published by . This book was released on 2018 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Behavior of Cold Formed Steel Framed Wall Line Systems in Mid Rise Buildings written by Amanpreet Singh and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cold-formed steel (CFS) framing offers many benefits to buildings in seismically active regions. Amongst the most notable CFS attributes include its low fabrication and maintenance costs, noncombustible and corrosion resistant nature, high durability and ductility. These benefits have made CFS framing a popular choice for construction of low-rise and mid-rise structures. From a seismic performance perspective, the light weight and ductility offered by a CFS-framed structure aligns with system resiliency needs in moderate to high seismic zones. Although experimental data exists documenting the performance of isolated CFS-framed shear walls, the structural lateral force resisting systems (LFRS) in CFS-framed buildings are constructed and integrally attached to non-designated systems, such as gravity walls as well as various nonstructural components. The contribution of the non-designated systems and the nonstructural components towards the response of wall-lines within the building system under high intensity earthquake shaking is not well understood. Moreover, experimental data to support code guidelines in current North American standards for design of CFS-framed shear walls, which meet the seismic demands for mid-rise buildings (>6 stories) are lacking. Indeed, the paucity of full-scale test data documenting the behavior of wall-line systems detailed for mid-rise buildings has been a barrier to bringing the potential benefits of CFS framing to the community. To address these limitations, a two-phased experimental program was undertaken in this dissertation to advance the understanding of CFS-framed steel sheet sheathed shear walls placed in-line with gravity walls. Referred to herein as "wall-lines", these test specimens were detailed to support the lateral load demands anticipated of mid-rise buildings in high seismic zones. In the first phase, wall-line assemblies were tested at full-scale on a shake table, first under a sequence of increasing amplitude (in-plane) earthquake input motions, and subsequently under slow monotonic pull conditions (for select specimens). In the second phase, wall-line assemblies were tested under quasi-static reverse cyclic displacement-controlled loading using a simulated floor-load imposed via hydraulic actuators. Steel sheet sheathed shear walls offered energy dissipation primarily through structural member-to-sheathing connections and yielding of the steel sheet. All specimens demonstrated a tension field that spread across the entirety of the steel sheet at failure. The impact of different test variables governing the structural and nonstructural detailing on the seismic performance of the CFS-framed wall-line specimens is quantified by careful systematic comparison between different configurations. Wall-line assemblies with interior and exterior finish demonstrated substantially increased strength and stiffness without any decrease in drift capacity or change in failure mode. Specimens with hold-downs offered a larger lateral strength compared to specimens with tension tie-rods. However, hold-downs reached their capacity at higher drift demands whereas tension tie-rods remained linear elastic, even though both wall-lines with the different tie-down systems were designed for same overstrength force levels. The second part of this work involved a comprehensive numerical modeling effort, using prior experimental findings, both of the wall-line experiments discussed herein as well as a previous mid-rise six-story building specimen tested at full-scale using a suite of earthquake excitations. The developed finite element model takes into consideration the major assemblies, beyond just the isolated shear walls, which influence the dynamic response of the system, such as the strength and stiffness contribution from gravity walls as well as nonstructural components such as exterior and interior finishes installed over the shear wall and gravity wall segments. In this phase, as is common in west coast practice in the United States, a continuous tie-rod system is also modeled to capture the cumulative floor displacements caused by the axial elongation in the steel rods. The effect of built-up stud packs on strength, stiffness and drift parameters of a shear wall is also considered in the nonlinear hysteretic material model of shear walls. Very good agreement between numerical predictions and available experimental seismic response data of the six-story test building demonstrates that the proposed numerical model scheme can be employed to predict the seismic response of mid-rise CFS-framed buildings. Development of such a numerical model is an essential tool for enabling performance-based seismic design of cold-formed steel structures in this rapidly growing industry.
Download or read book Seismic Performance Evaluation of Reinforced Concrete Framed Buildings with Shear Walls written by Injam Siva Parvathi and published by . This book was released on 2020-03-17 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Design of Lateral Resisting Cold formed Steel Framed CFS Structures written by Iman Shamim and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Seismic design provisions for wood sheathed / cold-formed steel (CFS) framed shear walls and CFS strap braced walls are available in the AISI S213-07 Standard. However, the National Building Code of Canada (NBCC), as well as the CSA S136 and the AISI S213 Standards, at present, do not address the seismic design of steel sheathed / CFS framed shear walls for use in Canada. The existing design guidelines for CFS framed shear walls are based on data obtained from static tests carried out under both monotonic and reversed cyclic loading protocols. The objective of this research was to develop seismic design provisions for the CFS framed shear walls forming part of the seismic force resisting system of a building, with the intent to recommend that they be included in the NBCC and AISI S213. The approach involved shake table testing of single- and double-storey CFS framed steel and wood sheathed shear walls, numerical modeling of the tested shear walls, and, lastly, non-linear time history dynamic analyses of building archetypes following the Federal Emergency Management Agency (FEMA) P695 methodology. Overall, seven wood sheathed and ten steel sheathed CFS framed shear walls were tested on the Ecole Polytechnique de Montréal structural laboratory shake table. The wall specimens were full-scale single- and double-storey walls and, most, were constructed with the blocking in the CFS frame. A wood sheathed shear wall was tested with a gypsum panel on one side of the specimen in order to investigate the effects of non-structural components. The dynamic test program included impact tests, harmonic forced vibration tests, and ground motion tests representative of the seismic hazard in Quebec and Vancouver, Canada. The seismic performance of the dynamically tested shear walls, i.e. force vs. displacement hysteretic behaviour and failure modes, was primarily similar to the static tests. Inclusion of the blocking increased the shear strength of the tested shear walls by almost 50%. OpenSees software was used for the numerical modelling of the dynamically tested walls. The inelastic behaviour of the shear walls was replicated by using the Pinching04 material; additional zerolength spring elements were included in the model to represent frame stiffness, anchor rod stiffness and the CFS framing. The wall models were calibrated based on the results of the dynamic tests, as well as data obtained from the calibration of previously performed static tests. Moreover, to provide experimental data to complete the model calibration procedure a series of static tests was conducted on blocked CFS bare frames and stud-to-track connections. The archetype buildings (twelve in total) were two, four and five storey office and residential buildings located in Halifax, Montreal and Vancouver, Canada. The buildings designed with Rd = 2.0 and Ro = 1.3 satisfied the FEMA P695 collapse capacity requirements. Inclusion of gypsum panel in two of the archetype buildings increased the collapse margin ratio by 20% on average." --
Download or read book Seismic Performance of an Instrumented Six story Steel Building written by James C. Anderson and published by . This book was released on 1991 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NEHRP National Earthquake Hazards Reduction Program Recommended Provisions for the Development of Seismic Regulations for New Buildings written by Building Seismic Safety Council (U.S.) and published by . This book was released on 1985 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance of Steel Plate Shear Walls Using Nonlinear Static Analysis written by MOON MOON DHAR and published by . This book was released on 2015 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unstiffened steel plate shear wall (SPSW) is considered as a primary lateral load resisting system due to its significant post-buckling strength, high ductility, stable hysteretic behaviors and robust initial stiffness. Nonlinear seismic analysis can accurately estimate structural responses, however, the method is very time consuming and may not be suitable for regular engineering practice. On the other hand, traditional pushover analysis method does not consider contributions of higher modes to the structural responses and thus, often do not provide good estimation of seismic responses for taller buildings. Capacity-Spectrum Method (CSM) and modal pushover analysis (MPA) are two simple nonlinear static methods that have been proposed and recently used for seismic performance evaluation of few lateral load-resisting systems. This research further examines the applicability of CSM and MPA methods to assess seismic performance of steel plate shear walls. A nonlinear finite element model was developed and validated with experimental studies. Three different SPSWs (4-, 8-, and 15-storey) designed according to capacity design approach were analysed by subjecting the steel shear walls under artificial and real ground motions for Vancouver. The CSM and MPA procedures were applied to analyse the selected SPSWs and the results were compared with more accurate nonlinear seismic analysis results. It is observed that both CSM and MPA procedures can reasonably predict the peak roof displacements for low-rise SPSW buildings. In addition, MPA procedure, which includes contributions of higher modes when estimating seismic demands of buildings, provides better predictions of critical seismic response parameters for taller SPSWs.
Download or read book Seismic Design for Buildings written by United States. Department of Defense. Tri-Service Seismic Design Committee and published by . This book was released on 1973 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance Evaluation of Reinforced Concrete Shear Wall Seismic Force Resisting Systems written by Shahaboddin Mousavi Azad Kasmaei and published by . This book was released on 2008 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seismic Performance Analysis of Mid Rise Concrete Shear Wall Buildings Reinforced with Superelastic Shape Memory Alloys written by Marina Maciel and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the seismic performance of hybrid Shape Memory Alloy (SMA)-steel reinforced concrete shear walls containing Nickel-Titanium (Ni-Ti) superelastic SMA as alternative reinforcement in the plastic hinge region. This wall system permits self-centering with high levels of energy dissipation and significant reduction of permanent deformations. Conventional steel-reinforced concrete shear walls were designed for a prototype 10-storey office building, assuming seismic design scenarios in eastern and western Canada. Equivalent hybrid SMA-steel reinforced concrete shear walls were defined following the designed cross-sections of the conventional walls. Full-scale, 2-D finite element models of the walls were developed and subjected to nonlinear, static and time-history analyses, employing historical and simulated ground motion records for the latter. The numerical results confirmed the superior self-centering capacity of the hybrid SMA-steel reinforced walls, showing potential to optimize the seismic performance of reinforced concrete buildings, particularly in high seismic zones, by controlling residual deformations and reducing damage.
