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 Seismic performance of Chinese traditional timber frames

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 6135-6146
Author(s):  
Deshan Yang ◽  
Ming Xu ◽  
Zhongfan Chen
Keyword(s):  
Energy Dissipation ◽  
Shear Walls ◽  
Shear Wall ◽  
Initial Stiffness ◽  
Timber Frame ◽  
Lateral Resistance ◽  
Load Carrying ◽  
Practical Engineering ◽  
Technical Basis ◽  
Timber Shear Wall

Chinese traditional timber frames are known for their mortise-tenon joints and wooden planks shear walls. To investigate the seismic behavior of the structural system, three full-scale timber frames were subjected to in-plane quasi-static loading. The hysteresis characteristics, lateral load-carrying capacities, lateral stiffnesses, and energy dissipation capacities of the timber frames were investigated. The results showed that the hysteretic loops of all specimens exhibited pinching, and the column and beam components were nearly intact after the test. The traditional wooden frames had large deformability. The installation of the infilled timber shear wall brought great improvements in lateral resistance and energy dissipation to the bare frames. The initial stiffness of the timber frame infilled with timber shear wall was 0.113 kN/mm, which was 56.9% and 11.9% greater than those of the bare frame specimen F1 and specimen F2, respectively. The results from the experimental analyses can serve as a technical basis for the development of seismic design methods and strengthening designs of such structures in practical engineering.

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.

Monotonie and cyclic tests of timber shear walls

1992 ◽  
Vol 19 (3) ◽  
pp. 415-422 ◽  
Author(s):  
J. D. Dolan ◽  
B. Madsen
Keyword(s):  
Analytical Study ◽  
Shear Walls ◽  
Shear Wall ◽  
Displacement Curve ◽  
Cyclic Tests ◽  
Maximum Displacement ◽  
Load Displacement ◽  
Timber Shear Walls ◽  
Ramp Load ◽  
Monotonic Load

The results for monotonic (ramp load) and slow cyclic racking tests of timber shear walls are presented. The tests are part of an extensive experimental and analytical study to investigate the behaviour of timber shear walls subjected to earthquakes. The results of full-size shear wall tests show the important influence of the nail connection between the sheathing and the framing on the load-displacement characteristics of shear walls. The premise that the hysteresis for the shear wall is contained within an envelope defined by the monotonic load-displacement curve for the wall is confirmed. Also, the hysteresis is studied to determine the physical behaviour that causes the shape of the hysteresis to be dependent on the maximum displacement of the wall. Both the monotonic and cyclic racking behaviours of timber shear walls are established; and the performances of plywood and waferboard sheathed shear walls are compared. Key words: full-scale monotonic and cyclic tests, plywood, waferboard, timber shear walls.

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 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.

scholarly journals OSB sheathed light-frame timber shear walls with strong anchorage subjected to vertical load, bending moment, and monotonic lateral load

2018 ◽  
Vol 173 ◽  
pp. 787-799 ◽  
Author(s):  
Abdollah Sadeghi Marzaleh ◽  
Stella Nerbano ◽  
Andrea Sebastiani Croce ◽  
René Steiger
Keyword(s):  
Bending Moment ◽  
Shear Walls ◽  
Lateral Load ◽  
Vertical Load ◽  
Timber Shear Walls

scholarly journals Numerical Study on Deformation Capacity of Steel Plate Reinforced Concrete Shear Walls

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Zhi Zhou ◽  
Jiang Qian ◽  
Wei Huang
Keyword(s):  
Reinforced Concrete ◽  
Steel Plate ◽  
Numerical Study ◽  
Shear Walls ◽  
Element Model ◽  
Shear Wall ◽  
Cyclic Loads ◽  
Deformation Capacity ◽  
Flexural Failure ◽  
Lateral Resistance

Steel plate reinforced concrete (SPRC) shear wall consists of steel plate encased in the concrete, in which the material advantages of both concrete and steel are utilized. The lateral resistance and deformation capacity of the shear wall are greatly improved. This paper investigates the deformation capacity of the SPRC shear wall under cyclic loads. A nonlinear 3-D finite element model in ABAQUS was developed and validated against published experimental results. Then, a parametric study was conducted to obtain the yield and ultimate rotation of SPRC shear walls with flexural failure. By statistical analyses, formulas for the yield and ultimate rotation of SPRC shear wall were proposed.

scholarly journals Experiments on Hybrid Precast Concrete Shear Walls Emulating Monolithic Construction with Different Amounts of Posttensioned Strands and Different Debond Lengths of Grouted Reinforcements

2016 ◽  
Vol 2016 ◽  
pp. 1-13
Author(s):  
Zhangfeng Zhu ◽  
Zhengxing Guo
Keyword(s):  
Energy Dissipation ◽  
Brittle Failure ◽  
Precast Concrete ◽  
Shear Walls ◽  
High Strength ◽  
Shear Wall ◽  
Restoring Force ◽  
Lateral Resistance ◽  
Wall Specimen ◽  
Variable Condition

This paper proposed a hybrid precast concrete shear wall emulating monolithic construction (HPWEM) that utilized grouted vertical connecting reinforcements and unbonded posttensioned high-strength strands across the horizontal joint for the lateral resistance. The grouted reinforcements with predetermined debond length were used to provide strength by tension and energy dissipation by yielding. The posttensioned strands were mainly employed to offer the restoring force to reduce the residual displacement by elastic extension. The overlapping welded closed stirrups improved the confinement property of the restrained concrete, avoiding the brittle failure. Six HPWEM specimens, considering variables including the amounts of strands and the debond lengths of grouted reinforcements, as well as one referenced cast-in-place monolithic wall specimen, were tested under the low-cycle reversed lateral load. The HPWEM specimens were capable of providing strength, stiffness, ductility, and energy dissipation equivalent to that of the monolithic wall specimen under certain variable condition.

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