Seismic performance of shear wall buildings with gravity-induced lateral demands

2014 ◽  
Vol 41 (4) ◽  
pp. 323-332 ◽  
Author(s):  
Michael R. Dupuis ◽  
Tyler D.D. Best ◽  
Kenneth J. Elwood ◽  
Donald L. Anderson
Keyword(s):  
Shear Walls ◽  
Seismic Loading ◽  
Shear Wall ◽  
Building Codes ◽  
Inelastic Displacement ◽  
Architectural Features ◽  
Seismic Force ◽  
Design Characteristics ◽  
New Buildings ◽  
Gravity System

Architectural features and other irregularities in the gravity system which apply gravity-induced lateral demands to the seismic force resisting system are being incorporated in new buildings. These gravity-induced demands have raised concerns due to the perceived potential for a ratcheting effect to occur during seismic loading. This paper summarizes the results of a study to identify if there are behavioral trends not recognized within the scope of current building codes. To this end, a nonlinear, parametric study was conducted in OpenSees to investigate the inelastic response of concrete shear wall buildings with a range of design characteristics, including gravity-induced lateral demands. The results demonstrated that a seismic ratcheting effect can develop and amplify inelastic displacement demands. The effect is significantly more prevalent in coupled shear walls compared with cantilevered shear walls. An irregularity class to address buildings with gravity-induced lateral demands on the seismic force resisting system is proposed for the 2015 National Building Code of Canada.

scholarly journals Analisis Pengaruh Lokasi Dinding Geser Terhadap Pergeseran Lateral Bangunan Bertingkat Beton Bertulang 5 Lantai

2021 ◽  
Vol 4 (1) ◽  
pp. 16
Author(s):  
Leonardus Setia Budi Wibowo ◽  
Dermawan Zebua
Keyword(s):  
Lateral Displacement ◽  
Shear Walls ◽  
Seismic Loading ◽  
Shear Wall ◽  
Structural System ◽  
Earthquake Force ◽  
Earthquake Resistant ◽  
Story Drift ◽  
Frame System ◽  
Rc Shear Wall

Indonesia is one of the countries in the earthquake region. Therefore, it is necessary to build earthquake-resistant buildings to reduce the risk of material and life losses. Reinforced Concrete (RC) shear walls is one of effective structure element to resist earthquake forces. Applying RC shear wall can effectively reduce the displacement and story-drift of the structure. This research aims to study the effect of shear wall location in symmetric medium-rise building due to seismic loading. The symmetric medium rise-building is analyzed for earthquake force by considering two types of structural system. i.e. Frame system and Dual system. First model is open frame structural system and other three models are dual type structural system. The frame with shear walls at core and centrally placed at exterior frames showed significant reduction more than 80% lateral displacement at the top of structure.

Seismic force modification factors for light-gauge steel-frame - wood structural panel shear walls

2007 ◽  
Vol 34 (1) ◽  
pp. 56-65 ◽  
Author(s):  
F A Boudreault ◽  
C Blais ◽  
C A Rogers
Keyword(s):  
Design Method ◽  
Time History ◽  
Shear Walls ◽  
Shear Wall ◽  
Design Guidelines ◽  
Steel Frame ◽  
Uniform Hazard Spectrum ◽  
Seismic Force ◽  
Structural Panel ◽  
Panel Shear

Design guidelines for laterally loaded light-gauge steel-frame – wood structural panel shear walls are not available in Canadian codes. A design method for the calculation of shear stiffness and strength has been developed for use with the 2005 National Building Code of Canada (NBCC), however. This method was based on the analysis, using an equivalent energy elastic–plastic (EEEP) approach, of over 180 single-storey shear wall tests of various configurations. Ductility-related (Rd) and overstrength-related (Ro) force modification factors also need to be defined to calculate equivalent static seismic forces following the 2005 NBCC. This paper describes the development of these two factors based on the EEEP analysis of the shear wall test results. To verify the "test-based" Rdand Rovalues, nonlinear time-history dynamic analyses of two representative buildings were carried out using a suite of 10 earthquake records scaled to the 2% in 50 year uniform hazard spectrum (UHS) for Vancouver, British Columbia. Preliminary values have been determined for the force modification factors, namely Rd= 2.5 and Ro= 1.7.Key words: shear wall, light-gauge steel, wood structural panel, seismic, R value.

scholarly journals Optimization of the Location of Shear Wall in a Multistory Building

2019 ◽  
Vol 9 (2) ◽  
pp. 3981-3983
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Wind Loads ◽  
Seismic Loads ◽  
Lateral Loads ◽  
Analysis Software ◽  
Multistory Building ◽  
Seismic Force ◽  
Earthquake Load ◽  
Is Design

A Shear Wall Is An Upright Part Of A Seismic Strength Resisting System That Is Planned To Defend Against In-Plane Adjacent Forces, Characteristically Wind And Seismic Loads. In Many Ruled Buildings, Global Building Code And Intercontinental Residential Code Manages The Design Of Shear Walls. The Loads Of The Shear Walls Resists Loads Which Is Equal To The Plane Of The Walls. Collectors As Well Known As Drag Associates, Handover The Diaphragm Shear To Shear Walls And Other Vertical Features Of The Seismic Force Resisting Arrangement. In This Study, We Have Selected” Optimization Of The Location Shear Wall In A Multistory Building” Analysis Is Done On The Multistory Building. The Model Of Shear All N Building Is Design In The Staad Pro V8i (Series 4) Designing & Analysis Software. Then Giving It The Constrains Which Are Act On The Acting Earthquake Load And Wind Loads On Building Made Nodes Weak To Strengthen That Node We Provide The Shear Wall. After Adding Of Shear Wall On Building Into Model & Analysis It On Staad Pro In Std Format. After The Analysis Of The Location Of Shear Wall On Building It Analyzed That The Shear Wall Location In Multistory Building Providing The Strength To Weak Nodes Of Building And Helps The Building To Resist The Lateral Loads, Wind Loads And Earthquake Load Acting On Building.

Low-Rise Shear Wall Ultimate Drift Limits

1994 ◽  
Vol 10 (4) ◽  
pp. 655-674 ◽  
Author(s):  
T. A. Duffey ◽  
C. R. Farrar ◽  
A. Goldman
Keyword(s):  
Aspect Ratio ◽  
Ultimate Load ◽  
Shear Walls ◽  
Seismic Loading ◽  
Shear Wall ◽  
Wall Structure ◽  
Design Code ◽  
Seismic Design Code ◽  
Drift Limit ◽  
Lateral Deflections

Drift limits for low aspect ratio reinforced concrete shear walls are investigated by reviewing the open literature for appropriate experimental data. Based on the geometry of structures designed for protective purposes and concerns regarding their response during seismic loading, data are obtained from pertinent references for which the wall aspect ratio is less than or equal to approximately 1, and for which loading is cyclic in nature (typically displacement controlled). In particular, lateral deflections at ultimate load, and at points in the softening region beyond ultimate for which the load has dropped to 90, 80, 70, 60, and 50 percent of its ultimate value, are obtained and converted to drift information. The statistical nature of the data is also investigated. For example, at ultimate load the median drift limit is 0.72 percent, and it increases to 1.84 percent when the load drops to 50 percent of its ultimate value. These data are shown to be lognormally distributed, and an analysis of variance is performed. The use of these statistics to estimate probability of failure for a shear wall structure is illustrated. Finally, a brief comparison of drift limit results with existing seismic design code requirements is presented.

Features of Elastic-plastic Deformation of Reinforced Concrete Shear-wall Structures under Earthquake Excitations

2020 ◽  
pp. 18-28
Author(s):  
Oleg Kabantsev ◽  
Karomatullo Umarov
Keyword(s):  
Reinforced Concrete ◽  
Concrete Structures ◽  
Nonlinear Dynamic Analysis ◽  
Shear Walls ◽  
Shear Wall ◽  
Reduction Factor ◽  
Reinforced Concrete Structures ◽  
Structural Elements ◽  
Plastic Deformations ◽  
Seismic Force

The article provides the results of studies the process of formation and development of plastic deformations in reinforced concrete structures with shear-wall under earthquake excitations. The studies are carried out by numerical methods using nonlinear dynamic analysis. The results of the research shown: that in the shear-wall elements of reinforced concrete structures the level of plastic deformations should be significantly reduced in relation to the normative level of plastics in other structural elements of the carrier system. The completed studies substantiated the introduction of differentiated values seismic-force-reduction factor for different types of structural elements on shear-walls reinforced concrete structures of earthquake-resistant buildings.

scholarly journals Seismic Behavior of Innovative Hybrid CLT-steel Shear Wall for Mid-Rise Buildings.

2021 ◽  
Author(s):  
Tulio Carrero Enrique ◽  
Jairo Montaño ◽  
Sebastián Berwart ◽  
Hernán Santa María ◽  
Pablo Guindos
Keyword(s):  
Seismic Behavior ◽  
Weight Ratio ◽  
Shear Walls ◽  
High Strength ◽  
Cost Effective ◽  
Shear Wall ◽  
Engineering Problem ◽  
Cyclic Behavior ◽  
Seismic Force ◽  
Panel Shear

Abstract This paper examines the seismic behavior of CLT-steel hybrid walls at six- and ten-story heights to increase seismic force resistance compared to a conventional wooden wall. The ultra-strong shear walls proposed in this paper are called Framing Panel Shear Walls (FPSW), which are based on a robust articulated steel frame braced with CLT board panels and steel tendons. Timber structures are well-known for their ecological benefits, as well as their excellent seismic performance, mainly due to high strength-to-weight ratio compared to steel and concrete ones, flexibility, and redundancy. However, in order to meet the requirements regarding the maximum inter-story drifts prescribed in seismic design codes, a challenging engineering problem emerges, because sufficiently resistant, rigid and ductile connections and lateral assemblies are not available for timber to meet both the technical and economical restrictions. Therefore, it is a necessity to develop strong and cost-effective timber-based lateral systems, in order to become a real alternative to mid- and high-rises, especially in seismic countries. In this investigation, the dynamic response of cross-laminated timber (CLT) combined with hollow steel profiles has been investigated in shear wall configuration. After experimental work, an investigation was also carried out into numerical modelling for simulating the cyclic behavior of a hybrid FPSW wall and the spectral modal analysis of a six- and a ten-story buildings with FPSW. A FPSW shear wall can double the capacity and stiffness.

scholarly journals EFFECT OF SHEAR WALL ON PERFORMANCE OF MULTISTOREY BUILDING

2020 ◽  
Vol 4 (5) ◽  
pp. 26-39
Author(s):  
MIRZA AAMIR BAIG ◽  
Rizwan Rashid
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Inertia Force ◽  
High Rise ◽  
Coupled Shear Wall ◽  
Wall Structures ◽  
Seismic Force ◽  
Structural Configurations ◽  
Seismic Forces ◽  
Physical Phenomena

Seismic force, predominantly being an inertia force depends on the mass of the structure. As the mass of the structure increases the seismic forces also increase causing the requirement of even heavier sections to counter that heavy forces. And these heavy sections further increase the mass of the structure leading to even heavier seismic forces. Structural designers are met with huge challenge to balance these contradictory physical phenomena to make the structure safe. The structure no more can afford to be rigid. This introduces the concept of ductility. The structures are made ductile, allowing it yield in order to dissipate the seismic forces. A framed structure can be easily made ductile by properly detailing of the reinforcement. But again, as the building height goes beyond a certain limit, these framed structure sections (columns) gets larger and larger to the extent that they are no more practically feasible in a structure. There comes the role of shear walls. Shear walls provide ample amount of stiffness to the building frame resisting loads through in plane bending. But they inherently make the structure stiffer. So, there must be a balance between the amount of shear walls and frame elements present in a structure for safe and economic design of high-rise structures. Here an attempt has been made to study the behavior of different structures of reinforced concrete with different heights with and without shear walls. Coupled shear walls have also been studied to understand the comparative merit or demerit of framed structures with shear wall structures. Studies have been carried out on sample model structures and analysis has been carried out by ETABS software. It has been ensured to consider sample models that represent the current practices in structural design to include different structural configurations. Models having varied structural configurations like framed, shear wall, coupled shear wall, central core shear wall, core in core etc. have been taken into consideration. The inherent asymmetry present in the structures have also been dealt. The results have been tabulated and plotted to study their comparative behavior and interaction with each other. The findings of the study have been summarized and discussed.

Effects of openings on the seismic behavior and performance level of concrete shear walls

2019 ◽  
Author(s):  
Hossein Alimohammadi ◽  
Mostafa Dalvi Esfahani ◽  
Mohammadali Lotfollahi Yaghin
Keyword(s):  
Static Analysis ◽  
Cross Section ◽  
Seismic Behavior ◽  
Shear Walls ◽  
Shear Wall ◽  
Constant Cross Section ◽  
Added Resistance ◽  
Different Shapes ◽  
And Performance ◽  
Abaqus Software

In this study, the seismic behavior of the concrete shear wall considering the opening with different shapes and constant cross-section has been studied, and for this purpose, several shear walls are placed under the increasingly non-linear static analysis (Pushover). These case studies modeled in 3D Abaqus Software, and the results of the ductility coefficient, hardness, energy absorption, added resistance, the final shape, and the final resistance are compared to shear walls without opening.

scholarly journals Lateral resistance of mass timber shear wall connected by withdrawal-type connectors

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Sung-Jun Pang ◽  
Kyung-Sun Ahn ◽  
Seog Goo Kang ◽  
Jung-Kwon Oh
Keyword(s):  
Experimental Data ◽  
Seismic Design ◽  
Shear Walls ◽  
Shear Wall ◽  
Vertical Load ◽  
Lateral Resistance ◽  
Kinematic Models ◽  
Mass Timber ◽  
Timber Shear Walls ◽  
Timber Shear Wall

AbstractIn this study, the lateral resistances of mass timber shear walls were investigated for seismic design. The lateral resistances were predicted by kinematic models with mechanical properties of connectors, and compared with experimental data. Four out of 7 shear wall specimens consisted of a single Ply-lam panel and withdrawal-type connectors. Three out of 7 shear wall specimens consisted of two panels made by dividing a single panel in half. The divided panels were connected by 2 or 4 connectors like a single panel before being divided. The applied vertical load was 0, 24, or 120 kN, and the number of connectors for connecting the Ply-lam wall-to-floor was 2 or 4. As a result, the tested data were 6.3 to 52.7% higher than the predicted value by kinematic models, and it means that the lateral resistance can be designed by the behavior of the connector, and the prediction will be safe. The effects of wall-to-wall connectors, wall-to-floor connectors and vertical loads on the shear wall were analyzed with the experimental data.

scholarly journals Experimental Response of Cold-formed Steel Stud Shear Wall with hardboard sheathing under seismic loading

2021 ◽  
pp. e00574
Author(s):  
Yasser E. Ibrahim ◽  
Asif Hameed ◽  
Asad Ullah Qazi ◽  
Ali Murtaza Rasool ◽  
Muhammad Farhan Latif ◽  
...  
Keyword(s):  
Seismic Loading ◽  
Shear Wall ◽  
Cold Formed Steel ◽  
Experimental Response ◽  
Steel Stud
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