A Critical Review of the Seismic Design Provisions for Ductile Shear Walls of the Canadian Code and Commentary

1975 ◽  
Vol 2 (4) ◽  
pp. 592-601 ◽  
Author(s):  
T. Paulay ◽  
S. M. Uzumeri
Keyword(s):  
Shear Stress ◽  
Seismic Design ◽  
Seismic Risk ◽  
Plastic Hinge ◽  
Shear Walls ◽  
Shear Wall ◽  
Risk Areas ◽  
The Relationship ◽  
Code Provisions

The 1975 Canadian Building Code for the design of reinforced concrete shear wall buildings in high seismic risk areas includes provisions that are new and significant. This paper critically examines some of these provisions, especially as they apply to cantilever shear walls. Clarifications in the definitions of curvature, member, and system ductilities are attempted. The relationship between curvature and system ductility is examined. Code provisions on allowable shear stress in the wall in the plastic hinge region and the provisions for the classification of the walls are discussed. Attention of the designer is drawn to some aspects of the code and the commentary that may result in structures of doubtful safety.

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.

Experimental Investigation on Seismic Behaviors of High-Performance Concrete Shear Walls of Rectangular Section

2011 ◽  
Vol 255-260 ◽  
pp. 2439-2443 ◽  
Author(s):  
Xing Wen Liang ◽  
Jia Liang Kou ◽  
Ming Ke Deng
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Plastic Hinge ◽  
Shear Walls ◽  
Shear Wall ◽  
Wall Structure ◽  
Deformation Capacity ◽  
Damage Level ◽  
Wall Deformation ◽  
Hinge Zone

The paper explores the failure mode, failure mechanism and deformation capacity of medium-high and low-rise shear walls. The experimental results from load-tests of 5 high-performance concrete shear walls with 1.5 and 1.0 shear span ratio indicate that the shear walls deformation capacity benefits from several bar rings like a chain along boundary element in plastic hinge zone, showing that shear wall deformation capacity design is reliable to a certain extent, in that the plastic hinge zone often influences the damage level of shear walls. With the damage at different stages, the paper divides the performance of shear wall structure into three kinds: serviceability, life-safety and collapse-prevention. Accordingly, it is proposed that the performance controlling indicators for shear wall structures is composed of storey drift ratio and the rotation of plastic hinge zone, and also provides consult values for each performance level.

scholarly journals Optimal Seismic Design of Steel Plate Shear Walls Using Metaheuristic Algorithms

2018 ◽  
Author(s):  
Ali Kaveh ◽  
Mohamad Farhadmanesh
Keyword(s):  
Seismic Design ◽  
Performance Optimization ◽  
Steel Plate ◽  
Shear Walls ◽  
Shear Wall ◽  
Metaheuristic Algorithms ◽  
Base Shear ◽  
Steel Plate Shear Walls ◽  
Steel Plate Shear Wall ◽  
Colliding Bodies Optimization

In this paper three well-known metaheuristic algorithms comprising of Colliding Bodies Optimization, Enhanced Colliding Bodies Optimization, and Particle Swarm Optimization are employed for size and performance optimization of steel plate shear wall systems. Low seismic and high seismic optimal designs of these systems are performed according to the provisions of AISC 360 and AISC 341. In one part of the low seismic example, a moment frame and Steel Plate Shear Wall (SPW) strength are compared. Performance optimization of the Special Plate Shear Wall (SPSW) for size optimized system is one of the objectives of the high seismic example. Finally, base shear sensitivity analysis on optimal high seismic design of SPSW and size optimization of a 6-story to a 12-story SPSW are performed to have a comprehensive view on the optimal design of steel plate shear walls.

Study on Improvement for Seismic Behavior of Reinforced Concrete Shear Walls

2011 ◽  
Vol 368-373 ◽  
pp. 1396-1401
Author(s):  
Ming Jin Chu ◽  
Peng Feng ◽  
Lie Ping Ye
Keyword(s):  
Seismic Performance ◽  
Shear Failure ◽  
Plastic Hinge ◽  
Shear Walls ◽  
Shear Wall ◽  
Structural Elements ◽  
Wall Structures ◽  
Damage Process ◽  
Energy Dissipation Capacity ◽  
Large Earthquakes

Shear walls are commonly used as structural elements to resist earthquake. The seismic performance of shear wall can be guaranteed under small earthquakes, but problems exist when it is subjected to large earthquakes. To improve the ductility and energy dissipation capacity of shear walls in large earthquakes, shear failure must be avoided and the performance of plastic hinge region must be improved. The adaptive-slit shear walls (ASSW) is proposed in this paper The mechanical characteristics of ASSW satisfy the requirements of structures under different seismic level. Therefore the damage process of ASSW can be controlled and the ductile shear failure can be realized, which obviously improve the seismic performance of shear wall structures.

scholarly journals Site Classification and Analysis in Beijing Based on Geological Factors

2020 ◽  
Vol 206 ◽  
pp. 01008
Author(s):  
Jiajun Sun ◽  
Yongqi Meng ◽  
Shuai zhao ◽  
Zhanfei Li ◽  
Xiaodi Tan
Keyword(s):  
Seismic Design ◽  
Site Classification ◽  
Borehole Data ◽  
Geological Maps ◽  
The Us ◽  
Geological Factors ◽  
Classification Index ◽  
Relationship Of ◽  
The Relationship

The paper involves the application of the surface geological method for regional site classification in Beijing. Geological maps are collected through GIS to create a relationship of classification between the geological factors of the geological maps and the site classification index of the US NEHRP code. First, the site classification of the US NEHRP is obtained, and based on the relationship of conversion, given by Chinese researchers, between the site classification of the US NEHRP and the China’s Code for Seismic Design of Buildings (GB50011-2010), the results of the site classification of Beijing are obtained based on China’s Code (GB50011-2010). Finally, based on the collected borehole data in Beijing, the results of the site classification map are verified and analyzed.

Torsion-based layout optimization of shear walls using multi-objective water cycle algorithm

2021 ◽  
pp. 136943322110179
Author(s):  
Hamid Dehnavipour ◽  
Hossein Meshki ◽  
Hosein Naderpour
Keyword(s):  
Seismic Design ◽  
Water Cycle ◽  
Shear Walls ◽  
Shear Wall ◽  
Design Codes ◽  
Multi Objective ◽  
Torsion Effect ◽  
Seismic Design Code ◽  
Principles Of Design ◽  
The Cost

In shear wall-based buildings, locating the shear wall in plan has an important role in the resistance of seismic loading. In this article, the minimum torsion is considered as one of the main goals for optimal layout of shear walls, unlike the common method that accepts a certain torsion limit. The method presented is in accordance with the principles of design codes with emphasis on reaching the least possible torsion effect. By using a multi-objective function, based on the Pareto solutions, the torsion function behaves against the cost of a structure subjected to constraints of flexural strength, shear strength, and drift. This approach has the ability to layout shear walls in irregular plans and those which have high architectural limits. Also, it can fulfill the main goal of a structural engineer in order to satisfy the requirements of an architectural plan and obtain its minimum torsion effect as well. This method has been applied to various types of regular and irregular plans according to the classification of seismic design codes. Results show that besides minimizing the cost, the torsion effect reaches the minimum possible value considered by the seismic design code, as compared with other methods.

scholarly journals Design of shear walls for seismic resistance

1977 ◽  
Vol 10 (1) ◽  
pp. 17-36
Author(s):  
I. C. Armstrong
Keyword(s):  
New Zealand ◽  
Shear Walls ◽  
Shear Wall ◽  
Seismic Resistance ◽  
Design Criteria ◽  
Load Factor ◽  
Capacity Design ◽  
Basic Shear ◽  
Code Provisions

Ductile coupled shear walls, ductile cantilever shear walls, and less ductile "category 6" shear walls comprise three basic shear wall types included in categories 3, 4, 5 and 6 of Table 5 of the earthquake provisions of the New Zealand Loadings Code. Seismic resistance of these shear wall types, when fully cracked with reinforcement at or near yield where applicable, is discussed relative to code provisions. Reinforcement requirements are outlined, using capacity design criteria for ductile walls, and load-factor methods for "category 6" shear walls requiring distributed vertical and horizontal reinforcement to control cracking.

scholarly journals Analytical Study on Seismic Performance of Aluminium Sandwich Shear Wall with Different Core Shapes

2021 ◽  
Author(s):  
Alka Susan Mathew ◽  
Regi P. Mohan
Keyword(s):  
Seismic Design ◽  
Bending Strength ◽  
Weight Ratio ◽  
Shear Walls ◽  
Maximum Load ◽  
Shear Wall ◽  
Framed Structures ◽  
Critical Elements ◽  
High Rise ◽  
Analysis Of Performance

Shear walls are efficient monotonic load resisting systems in high rise or super high rise framed structures and hence are the most critical elements in seismic design. This paper focus on application of Aluminium sandwich shear walls (ASSW) consist of aluminium panels as top and bottom plates and aluminium core to serve as seismic protection system. ASSW have the advantage that these are light weight systems with high stiffness to weight ratio and bending strength. These could well replace steel shear walls which are having more structural weight. This paper presents analytical analysis of performance of ASSW under monotonic and seismic loading using ANSYS software. Sandwich shear wall models were first simulated, verified and analysis was carried out. The response of aluminum sandwich shear wall with two different core shapes or configurations are studied to obtain optimum core shape or configuration for maximum load bearing capacity. Then full scale monotonic and cyclic tests were conducted on aluminium sandwich shear wall with optimum core shapes or configurations. The obtained results allow useful information for the selection of aluminium sandwich shear wall in the seismic design of framed structures.

RIGID-PLASTIC SEISMIC DESIGN OF REINFORCED CONCRETE SHEAR WALL

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5740-5746
Author(s):  
CHANG LIN FAN ◽  
SHAN YUAN ZHANG
Keyword(s):  
Seismic Design ◽  
Linear Time ◽  
Response Spectrum ◽  
Plastic Hinge ◽  
Design Procedure ◽  
Time History ◽  
Shear Wall ◽  
Wall Structure ◽  
Collapse Mechanism ◽  
Rigid Plastic

Basing the displacement-capacity design method and capacity spectrum method, a new rigid-plastic seismic design procedure is proposed to describe the behavior of shear wall structure under strong earthquakes. Firstly the concept of rigid-plastic hinge is used to choose a collapse mechanism of shear wall, then according to the dynamic performance criterion the yield load of structure is determined through rigid-plastic response spectrum. This procedure is used in 11-story reinforced structure shear wall design, the results of comparison with refined Non-Linear Time-History Analysis showing good agreement.

scholarly journals Code provisions for confining steel in potential plastic hinge regions of columns in seismic design

1980 ◽  
Vol 13 (1) ◽  
pp. 60-70
Author(s):  
R. Park ◽  
M. J. N. Priestley
Keyword(s):  
New Zealand ◽  
Seismic Design ◽  
Plastic Hinge ◽  
Design Code ◽  
Seismic Codes ◽  
Code Provisions

A summary is given of the provisions for both circular and rectangular confining steel in potential plastic hinge zones of columns, as specified in the seismic codes of various countries. In particular, a comparison is made between New Zealand and overseas recommendations. The background to the confining steel provisions recommended in the draft SANZ Concrete Design Code is outlined.

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