scholarly journals Deflections Estimation of Light Wood-framed Shear Walls Without Hold-Downs

2021 ◽  
Vol 248 ◽  
pp. 01073
Author(s):  
LI Jianan ◽  
Ling Wang ◽  
Xueying Hu ◽  
Tao Liu
Keyword(s):  
Structural Design ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Loading ◽  
Light Weight ◽  
Timber Structures ◽  
Lateral Deformation ◽  
Loading Test ◽  
Wood Structures ◽  
Framed Shear Walls

In the structural design of light wood structures in recent years, people have paid more and more attention to estimating the lateral deformation of buildings. In order to better estimate the lateral deformation of the balsa shear wall without hold-downs, this paper carried out the lateral loading test of the wood shear wall and the monotonic loading test of the nail joint. A formula for lateral load-deformation of nail nodes suitable for engineering entities is proposed. A method for calculating the lateral deformation of wood shear walls without hold-downs is provided. The method is based on the formula for lateral deformation of light-weight timber structure shear walls in China's Code for Design of Timber Structures (GB50005–2017) [1]. This method complements the domestic wood structure regulations very well.

Behavior of Double-Wall Precast Concrete Shear Wall under Low-Cyclic Reversed Loading Test

2014 ◽  
Vol 1079-1080 ◽  
pp. 354-358 ◽  
Author(s):  
Quan Dong Xiao ◽  
Zheng Xing Guo ◽  
Zhong Yuan Zhang
Keyword(s):  
Precast Concrete ◽  
Shear Walls ◽  
Shear Wall ◽  
Seismic Resistance ◽  
Loading Test ◽  
Ongoing Research ◽  
Reversed Loading ◽  
Resistance Performance ◽  
Double Wall

This paper describes an ongoing research program on the seismic resistance performance of the double-wall precast concrete (DWPC) shear wall. Low-cyclic reversed loading test of three new full scale specimens are carried out based on the previous studies. The test results indicate that DWPC shear walls have higher initial stiffness, cracking load, yielding load and ultimate load. The displacement ductility ratios of DWPC shear walls are no less than that of cast-in-situ shear wall. The hysteretic curves of all specimens are plump, and the trend of skeleton curves is basically the same. The seismic energy dissipation capacities of DWPC specimens are close to those of cast-in-situ specimen. All the specimens have shown favorable seismic resistance performance.

Research of Short-Leg Shear Wall Structure System Function in Multiple Coupled Field

2012 ◽  
Vol 594-597 ◽  
pp. 2464-2469
Author(s):  
Dai Kui
Keyword(s):  
Structural Design ◽  
Shear Walls ◽  
Shear Wall ◽  
Structure Design ◽  
Wall Structure ◽  
Structural System ◽  
Field Coupling ◽  
Structural Rigidity ◽  
Story Drift ◽  
Force Characteristics

Calculation of Short-leg shear walls structural system is a multi-field coupling problem. Through the research and application of short-leg shear wall structure calculation theory, based on the national codes,the short-leg shear wall design principles are established.It is discussed for the reason of the world's first short-leg shear wall structure design formation and development research. According to short-leg shear wall force characteristics, horizonal displacement is divided into destructive story drift and harmless story drift, the formula for calculating the destructive story drift is obtained, using destructive story drift angle parameters and the change of main section height to control the deformation, to control structural rigidity to ensure the structural design rational purpose.

Elastic Performances of Short Pier Shear Wall Subjected to Lateral Loading

2011 ◽  
Vol 368-373 ◽  
pp. 1227-1230
Author(s):  
Shi Mei Liu ◽  
Dong Sheng Huang
Keyword(s):  
Cross Section ◽  
Shear Walls ◽  
Shear Wall ◽  
Lateral Loading ◽  
Deflection Curve ◽  
Element Analysis ◽  
Horizontal Section ◽  
Mechanical Performances ◽  
The Moment ◽  
Minimum Ratio

The formulas to define the minimum ratio of length-to-thickness of the pier cross section of short-pier shear wall is presented, by which the short pier shear wall is distinguished from the irregular cross-section column frame numerically. According to the results of finite element analysis of typical short-pier shear walls, the elastic mechanical performances of them were investigated. Conclusions were achieved that the flange width hardly influence on the moment of piers but significantly influence on the magnitude of stresses in the horizontal section and the top displacements of walls; the deflection curve of short-pier shear wall is flexural-shearing type, equations and diagrams to define the position of the contra-flexural point in the curve are provided.

scholarly journals EXPERIMENTS AND RELIABILITY ANALYSIS ON FRAME-TO-SHEATHING JOINTS IN LIGHT WOOD FRAMED SHEAR WALLS

Wood Research ◽  
2021 ◽  
Vol 66 (5) ◽  
pp. 844-858
Author(s):  
HONGLIANG ZUO ◽  
JING DI
Keyword(s):  
Bearing Capacity ◽  
Reliability Analysis ◽  
Ductile Failure ◽  
Shear Walls ◽  
Shear Wall ◽  
Elastic Stiffness ◽  
First Order ◽  
Reliability Methods ◽  
Different Characteristics ◽  
Framed Shear Walls

To exploit the spruce-pine-fir (SPF) panel and the parallel strand bamboo (PSB) panel used in light wood framed shear wall and investigate the lateral behaviors of frame-to-sheathing joints in light wood framed shear wall with different characteristics, the experimental investigation and reliability analysis were carried out under monotonic load. The test configurations included joints with perpendicular-to-framing-grain load or parallel-to-framing-grain load, with SPF sheathing panel or PSB sheathing panel and with nail or screw. The results suggested that nailed joints with PSBpanel occurred ductile failure but other joints occurred brittle failure. Moreover, theultimate bearing capacity and the elastic stiffness of the joints under perpendicular load were higher than that ofthe joints under parallel load. The use of PSB panel and screw increased theultimate bearing capacity of the joints. Furthermore, based on Johansen yield theory and experimental results, the reliability analysis was carried out through first-order reliability methods. The results showed that the SPF-nail joints, the PSB-nail joints, and PSB-screw joints achieved the reliability requirements.

Lightweight Woodframe Shear Walls with Ply-Bamboo Sheathings

2016 ◽  
Vol 847 ◽  
pp. 529-536 ◽  
Author(s):  
Zhi Li ◽  
Yan Xiao ◽  
Giorgio Monti ◽  
Rui Wang
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Cyclic Test ◽  
Light Weight ◽  
Test Results ◽  
New Type ◽  
Timber Shear Walls

A new type of hybrid wood-bamboo shear wall was studied. Ply-bamboo is used as the sheathing panel for conventional two-by-four lightweight woodframe shear walls herein. Two different nails were adopted for the ease constructability and used for constructing the shear walls, as follows: gun-driven T shape nail and 6d common nail. Monotonic and cyclic test results of sheathing-frame connectors and corresponding full scare shear walls were also reported. The results obtained from the research reported in this paper indicated that ply-bamboo panels can be used as sheathings for light-weight timber shear walls.

scholarly journals Experimental Study on the Safety Assessment of Reinforced Concrete Shear Wall Structure with the Correspondence between Damage Image and Index

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Suxia Kou ◽  
Jianmin Zhang ◽  
Jing Ren
Keyword(s):  
Structural Damage ◽  
Safety Assessment ◽  
Failure Modes ◽  
Damage Identification ◽  
Damage Index ◽  
Shear Walls ◽  
Shear Wall ◽  
Design Parameters ◽  
Wall Structure ◽  
Loading Test

The post-disaster emergency rescue and loss evaluation hinges on the timeliness and accuracy of safety assessment of building structures in quake-hit regions. At present, the damage identification of quake-hit buildings in China is mainly conducted based on the experience of the experts. Such an assessment method will inevitably lead to the differences in identification results because each expert has his/her own subjective understanding of the degree of structural damage. In order to solve this problem, the low cyclic loading test of 7 specimens of shear wall is conducted and the hysteretic curves of seven shear walls are drawn. The failure modes and seismic performance of members under different design parameters (axial compression ratio of shear wall, shear span ratio, form of edge member, reinforcement ratio, stirrup ratio of coupling beam, and span height ratio) are compared. By recording the damage images taken at the controlled displacement under each level of load, the corresponding damage indexes are calculated, and the correspondence between the typical component damages and the damage indexes is discovered. After that, the images are compiled into an atlas. The authors calculate the damage index of the overall structure based on the damage indexes of the components and carries out damage identification of RC shear wall structure with the said damage index.

scholarly journals Experimental and Numerical Analysis of the Bolt Connections in a Low-Rise Precast Wall Panel Structure System

2019 ◽  
Vol 2019 ◽  
pp. 1-22 ◽  
Author(s):  
Wei Guo ◽  
Zhipeng Zhai ◽  
Zhiwu Yu ◽  
Feng Chen ◽  
Yongzhi Gong ◽  
...  
Keyword(s):  
Numerical Model ◽  
Shear Walls ◽  
High Strength ◽  
Shear Wall ◽  
Wall Panel ◽  
Loading Test ◽  
Structure System ◽  
Precast Shear Wall ◽  
Lateral Strength ◽  
Loading Tests

This paper develops a novel dry connection utilizing high-strength bolts and introduces the corresponding low-rise precast wall panel structure system. To investigate the seismic performance of the structure system with full bolt connections, monotonic loading tests of the connection joint and cyclic lateral loading tests of three full-scaled precast shear walls are both conducted. Based on the test data, axial and shear mechanical models of the connection are given. Meanwhile, experimental results show that the failure mode of the connection is dominated by anchored rebar ductile rupture, and the precast structure system presents a stable energy dissipation capacity and a good seismic ductility. The numerical model of the precast shear wall is then developed and validated by the cyclic loading test. Also a simplified calculation method to predict the lateral strength of the precast shear wall is proposed. According to the calculation results, the distance between the center of the connection and the edge of the shear wall is suggested to be 150 mm, while the wall thickness is recommended to be 120 mm or 150 mm. Finally, a three-story precast wall panel structure is employed to assess the collapse performance of the proposed precast structure system by using the presented numerical model. The results indicate that the proposed structure system with full bolt connections has high stiffness and high seismic resistance against collapse.

An efficient analysis of continuum shear wall models

1999 ◽  
Vol 26 (4) ◽  
pp. 425-433 ◽  
Author(s):  
Kinh H Ha ◽  
TMH Tan
Keyword(s):  
Boundary Conditions ◽  
Structural Design ◽  
Stiffness Matrix ◽  
Shear Walls ◽  
Shear Wall ◽  
Arbitrary Loading ◽  
Shear Theory ◽  
Governing Differential Equation ◽  
Fixed End ◽  
The Continuum

This paper formulates the stiffness matrix and a procedure for the analysis of a general class of coupled shear walls subjected to arbitrary loading and boundary conditions. The computed solutions for both deflections and stresses are exact in the sense that they satisfy the governing differential equation of the continuum shear theory, as well as all boundary conditions and inter-element compatibility. Explicit expressions are given for the formulation of the stiffness matrix and of the fixed-end forces for common loading conditions. The theory is also applicable to shear walls having variable stiffnesses and multiple bands of opening.Key words: coupled shear walls, stiffness matrix, finite element, structural analysis, structural design.

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