Seismic analysis of inelastic moment-resisting frames Part II: Energy dissipation in deformable panel zones

2007 ◽  
Vol 16 (3) ◽  
pp. 283-299
Author(s):  
Kevin K. F. Wong ◽  
Zhe Wang
Keyword(s):  
Energy Dissipation ◽  
Seismic Analysis ◽  
Moment Resisting Frames ◽  
Moment Resisting

scholarly journals Evaluation Of Response Modification Factor For Moment Resisting Frames

10.29007/q8wl ◽  
2018 ◽  
Author(s):  
Nirav K. Patel ◽  
Prutha Vyas
Keyword(s):  
Nonlinear Response ◽  
Seismic Analysis ◽  
Nonlinear Static Analysis ◽  
Elastic Response ◽  
Systematic Evaluation ◽  
Elastic Behaviour ◽  
Response Modification Factor ◽  
Moment Resisting Frames ◽  
Moment Resisting ◽  
Modification Factor

Conventional seismic analysis of structure incorporates only elastic response of the structure. To understand nonlinear response of the structure, Performance Based Design (PBD) approach is widely used. PBD includes Pushover analysis i.e. nonlinear static analysis, which shows the post-elastic behaviour of the structure. IS 1893-2002 incorporates the nonlinear response of a structure considering response reduction factor (R) so that a linear elastic force based approach can be used for design. The response modification factor plays a key role in the seismic design of new buildings. However, the Indian code does not provide information on the components of R factor. The values assigned to this factor is based on engineering judgment. The study includes the calculation of value R based on different components as per ATC-19 and compares values of R for Special Moment resisting frame (SMRF) and Ordinary Moment resisting frames (OMRF) for two different seismic zones. An improvement in the reliability of modern earthquake-resistant buildings will require the systematic evaluation of the building response characteristics, which mostly affects the values assigned to the factor.

Behaviour of dual eccentrically braced steel frames with short and long seismic links

2019 ◽  
Author(s):  
Ivan Lukačević ◽  
Tomislav Maleta ◽  
Darko Dujmovic
Keyword(s):  
Energy Dissipation ◽  
Plastic Hinge ◽  
Seismic Energy ◽  
High Strength ◽  
Elastic Behaviour ◽  
Braced Frame ◽  
Moment Resisting Frames ◽  
Collapse Mechanisms ◽  
Moment Resisting ◽  
Flexible Part

<p>Dual structures obtained by combining moment resisting frames with innovative bracing systems such as replaceable shear panels or seismic links have significant advantages among conventional solutions. The major advantages of such systems are energy dissipation in the specific locations and re-centring capability which significantly reduces repair costs. On the other hand, design of such systems is driven with specific requirements such as combining different steel grades to ensure elastic behaviour of the flexible part of the system. This paper deals with comparative behaviour analyses of two dual systems combining moment resisting multi-storey frames with eccentric bracing systems. The steel frame consists of three bays with central braced frame and two adjacent moment resisting frames. The bracing system contains either long or short seismic link. Seismic energy dissipation of these systems is completely different. Long seismic links are characterised with a classical plastic hinge in which energy is dissipated through bending while in case of short seismic links seismic energy is dissipated through shear. Multi-linear plastic diagrams for both links have been defined and pushover analyses are performed. The behaviour of the analysed systems based on collapse mechanisms, overstrength ratio, target displacement and possible solutions for re-centring capabilities are discussed. Analysed system with short seismic links despite more complicated modelling and requirements for high strength steel in MRFs, results in higher overstrength ratio regarding the system with long seismic links. It is also far easier to dismantle system with short seismic links, due to the bolted connection of links with the adjacent members.</p>

Cyclic behaviour of locally web-stiffened W-shape beams

1995 ◽  
Vol 22 (1) ◽  
pp. 121-134
Author(s):  
R. M. Korol ◽  
M. L. Daali
Keyword(s):  
Energy Dissipation ◽  
Cyclic Loading ◽  
Steel Frames ◽  
Earthquake Response ◽  
Lateral Loads ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Cyclic Behaviour ◽  
Rotation Capacity ◽  
Moment Resisting

A series of tests on W-shaped beam-to-column connections subjected to quasi-static cyclic loading was conducted to assess their ductility and energy dissipation capabilities. The specimens represent beams in ductile moment resisting frames undergoing alternating lateral loads. The aim of this study was to assess and compare the rotation capacity and energy absorption of locally web-stiffened beams with unstiffened beams. Of direct relevance to seismically designed moment resisting steel frames, the experimental results of this research clearly highlight the superiority of herring-bone style web-stiffened specimens over vertically web-stiffened or unstiffened specimens. Key words: earthquake, response, steel, moment resisting frames, stiffener, cyclic loading.

Friction-Damped Moment-Resisting Frames

1996 ◽  
Vol 12 (3) ◽  
pp. 623-633 ◽  
Author(s):  
Douglas Way
Keyword(s):  
Energy Dissipation ◽  
Analytical Methods ◽  
Northridge Earthquake ◽  
Inelastic Behavior ◽  
Earthquake Energy ◽  
Moment Resisting Frames ◽  
Full Penetration ◽  
Energy Accounting ◽  
Moment Resisting

Friction-Damped Moment-Resisting Frames are discussed as an alternative to steel ductile moment-resisting frames. The design involves replacing all full penetration welds with bolted friction connections, thereby eliminating the problem of failures at welded connections as exhibited during the Northridge earthquake. Energy dissipation is achieved at the friction interface in lieu of inelastic behavior of the frame. Analytical methods that perform an energy accounting are discussed.

Some issues regarding the models of the mass and damping matrices in nonlinear seismic analysis of moment resisting steel frames

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 12-27
Author(s):  
Alfredo Reyes-Salazar ◽  
Eden Bojorquez ◽  
Juan Bojorquez ◽  
Mario D. Llanes-Tizoc ◽  
J. Ramon Gaxiola-Camacho ◽  
...  
Keyword(s):  
Seismic Analysis ◽  
Steel Frames ◽  
Moment Resisting

Performance-based assessment of seismic-resilient steel moment resisting frames equipped with innovative column base connections

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 1646-1664
Author(s):  
Elena Elettore ◽  
Annarosa Lettieri ◽  
Fabio Freddi ◽  
Massimo Latour ◽  
Gianvittorio Rizzano
Keyword(s):  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Performance Based Assessment ◽  
Moment Resisting ◽  
Base Connections ◽  
Column Base
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