scholarly journals Investigation on the Design Method of Shear Strength and Lateral Stiffness of the Cold-Formed Steel Shear Wall

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Shaofeng Nie ◽  
Tianhua Zhou ◽  
Yang Zhang ◽  
Ben Zhang ◽  
Shuo Wang
Keyword(s):  
Shear Strength ◽  
Design Method ◽  
Residential Buildings ◽  
Shear Walls ◽  
Shear Wall ◽  
Design Methods ◽  
Lateral Stiffness ◽  
Test Results ◽  
Gypsum Board ◽  
Cold Formed Steel

The assembled cold-formed steel stud shear walls are the main lateral force resisting members of cold-formed steel residential buildings. In this paper, three cold-formed steel shear walls with different types of sheathings (gypsum board and OSB board) were tested under the monotonic lateral loading. The failure modes, the shear strength, and the load-displacement curves of the shear walls were obtained and analyzed to investigate the relationship between screws and shear walls. The test results showed that the material types of the sheathings influence the shear strength of the CFS shear wall greatly. The sum of shear strengths of CFS shear walls with one-side gypsum board and CFS shear walls with one-side OSB board is close to that of the CFS shear wall with the both-sided board (one side is gypsum board and the other side is OSB board). The shear strength of the screws between the board and the CFS stud plays a decisive role in the shear strength of the CFS shear wall, which is usually governed by the shear strength of the screw connections. The design methods of the shear strength and the lateral stiffness of the CFS shear walls were proposed and evaluated by comparing the calculated results with the test results. The comparison results demonstrated that the modified design method of shear strength is conservative and feasible to predict the shear strength of the CFS shear wall. The design method of the lateral stiffness of the CFS shear wall is available to calculate the lateral displacement of the CFS shear wall under the elastic stage, but it is not useful under the nonelastic stage. The proposed design methods can be served as a reference for engineering practice.

scholarly journals Axial and Bending Bearing Capacity of Double-Steel-Concrete Composite Shear Walls

2020 ◽  
Vol 10 (14) ◽  
pp. 4935
Author(s):  
Peiyao Zhang ◽  
Quanquan Guo ◽  
Fei Ke ◽  
Weiyi Zhao ◽  
Yinghua Ye
Keyword(s):  
Bearing Capacity ◽  
Design Method ◽  
Shear Walls ◽  
Element Model ◽  
Shear Wall ◽  
Test Results ◽  
Nuclear Facilities ◽  
Bending Performance ◽  
Composite Shear Wall ◽  
Composite Shear

Double steel-concrete composite shear wall is a novel composite structure. Due to its good mechanical properties, it has been considered as a substitute for reinforced concrete walls in nuclear facilities, marine environmental structures, and high-rise buildings. However, the design method of the double-steel concrete composite shear wall is lacking. The purpose of this paper is to propose the bending capacity formula under large and small eccentric loads. By summarizing the test results of 49 steel-concrete composite double shear walls under cyclic loading from different studies, it was found that the bending failure of double-steel-concrete composite shear walls was featured by the concrete crushing at the bottom. A finite element model was established and it could simulate the axial and bending performance of double steel-concrete composite shear walls reasonably well. According to the experimental results and FE analysis, the primary assumptions for calculating the axial and bending bearing capacity of the double steel-concrete composite shear walls were proposed. Based on these assumptions, the bearing capacity formulas were derived according to the equilibrium theory of the cross section. The calculation results obtained by the bearing capacity formulas were in good agreement with the test results.

scholarly journals Testing and numerical analysis on cold-formed steel shear walls using corrugated steel sheathing

2017 ◽  
Author(s):  
Wenying Zhang ◽  
Yuanqi Li ◽  
Cheng Yu
Keyword(s):  
Parametric Analysis ◽  
Shear Walls ◽  
Shear Stiffness ◽  
Element Model ◽  
Shear Wall ◽  
High Shear ◽  
Test Results ◽  
Steel Sheets ◽  
Cold Formed Steel ◽  
Vertical Gravity

Cold-formed steel framed shear wall sheathed with corrugated steel sheets is a promising shear wall system for low- and mid-rise constructions at high wind and seismic zones due to its advantages of non-combustibility, high shear strength, and high shear stiffness. Monotonic and cyclic tests on full-scale wall assemblies using corrugated steel sheathing was conducted. To investigate the effect of vertical/gravity loading, shear wall specimens were tested under two different loading conditions: lateral loading, and a combined lateral and vertical/gravity loading. The test results are presented and discussed in this paper. Besides, finite element model of the proposed shear wall was created in Abaqus software. The validity of the numerical model was verified based on the test results. A series of parametric analysis were conducted, including the thickness of framing members, the cross section of stud members, yield strength of the frame members, stud spacing, and the influence of gravity loads. The detailed modeling information, relevant parametric analysis and recommendations for practical application of this type of shear resisting system are also presented.

scholarly journals Tests and Analyses of Slotted-In Steel-Plate Connections in Composite Timber Shear Wall Panels

2017 ◽  
Vol 2017 ◽  
pp. 1-20
Author(s):  
Ulf Arne Girhammar ◽  
Bo Källsner
Keyword(s):  
Bearing Capacity ◽  
Failure Modes ◽  
Design Method ◽  
Shear Walls ◽  
Test Results ◽  
Horizontal Shear ◽  
Load Bearing Capacity ◽  
Wood Panel ◽  
Load Bearing ◽  
Plate Connections

The authors present an experimental and analytical study of slotted-in connections for joining walls in the Masonite flexible building (MFB) system. These connections are used for splicing wall elements and for tying down uplifting forces and resisting horizontal shear forces in stabilizing walls. The connection plates are inserted in a perimeter slot in the PlyBoard™ panel (a composite laminated wood panel) and fixed mechanically with screw fasteners. The load-bearing capacity of the slotted-in connection is determined experimentally and derived analytically for different failure modes. The test results show ductile postpeak load-slip characteristics, indicating that a plastic design method can be applied to calculate the horizontal load-bearing capacity of this type of shear walls.

scholarly journals The shear strength of shear walls

1970 ◽  
Vol 3 (4) ◽  
pp. 148-162
Author(s):  
T. Paulay
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Shear Walls ◽  
Shear Wall ◽  
Reinforced Concrete Beams ◽  
Research Projects ◽  
Deep Beams ◽  
Current Recommendation ◽  
The University

To enable a comparison between the shear strength of shear walls and that of reinforced concrete beams to be made, the behaviour of the latter is briefly reviewed. The findings of research projects, related to deep beams and the effects of repeated cyclic loading, are summarised. More detailed information on the shear strength of deep beams, tested at the University of Canterbury, is presented, Particular problems associated with four classes of typical shear walls of multi-storey structures are briefly highlighted. The current recommendation of the
 SEAOC code, as applied to shear walls, are critically examined and certain
anomalies, which may ensue from their interpretation, are illustrated. Areas of research, related to the full evaluation of reinforced concrete shear wall
 behaviour, are suggested. The paper concludes with a number of design recommendations which suggest themselves from this review.

scholarly journals Improved Fastener-Based Modelling Method for Reinforced Cold-Formed Steel Shear Walls

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Xingxing Wang ◽  
Youcheng Li ◽  
Wei Wang ◽  
Shangxin Gao
Keyword(s):  
Numerical Models ◽  
Elastic Beam ◽  
Shear Walls ◽  
Test Results ◽  
Modelling Method ◽  
Shear Performance ◽  
Cold Formed Steel ◽  
Hysteretic Characteristics ◽  
Relative Errors ◽  
Equivalent Method

The fastener-based computational model is improved and extended to predict the shear performance of reinforced cold-formed steel (RCFS) shear walls. The failure mechanism of sheathing-to-stud connections with double-layer wallboards is first analysed, and a method for determining those connections’ shear properties is proposed. Numerical models of RCFS shear walls are then established and analysed. Based on simulated results that have been fully validated by previous test results, an equivalent method for perforated RCFS shear walls is proposed. Finally, the application of the improved fastener-based modelling method to mid-rise RCFS shear walls is verified. The following results were obtained. (1) The simulated load-displacement curves can fully reflect shear wall hysteretic characteristics; moreover, the relative errors between the simulated and test results are within 14.2%. (2) The equivalent method that simplifies the wall segment over an opening as a linear elastic beam is applicable in the case of 1.5 < b/d (i.e., the ratio of the opening width to the depth of the wall segment over the opening) ≤5.0. (3) The improved fastener-based modelling method can be used to effectively predict the lateral performance of mid-rise RCFS shear walls.

scholarly journals Automated Structural Design of Shear Wall Residential Buildings Using GAN-Based Machine Learning Algorithm

2020 ◽  
Author(s):  
Xinzheng Lu ◽  
Wenjie Liao ◽  
Yuli Huang ◽  
Zhe Zheng ◽  
Yuanqing Lin
Keyword(s):  
Structural Design ◽  
Learning Algorithm ◽  
Design Method ◽  
Residential Buildings ◽  
Confusion Matrix ◽  
Building Design ◽  
Shear Wall ◽  
Generative Adversarial Network ◽  
Adversarial Network ◽  
Design Documents

Abstract Artificial intelligence is transforming many industries and reshaping building design processes to be smarter and automated. While a large number of studies on automated building design have been carried out recently, they focused on architectural aspects, leaving a gap in its application to structural design. Considering the increasingly wide application of shear wall systems in high-rise buildings and envisioning the massive benefit of automated structural design, this paper proposes a shear-wall design automation model based on a generative adversarial network (GAN). Its goal is to learn from existing shear wall design documents and then perform structural design intelligently and swiftly. To this end, a database of representative architectural and structural design documents was developed. Then, datasets were prepared via abstraction, semanticization, classification, and parameterization in terms of building height and seismic design category. The GAN model improved its shear wall design proficiency through adversarial training supported by data and hyper-parametric analytics. The performance of the trained GAN model was appraised against the metrics based on the confusion matrix and the intersection-over-union approach. Finally, case studies were conducted to evaluate the applicability, effectiveness, and appropriateness of the innovative GAN-based structural design method.

scholarly journals COMPUTATIONAL ASSESSMENT FOR SEISMOLOGICAL PERFORMANCE OF MULTISTOREY FLAT SLAB STRUCTURES WITH (AT SPECIFIC POSITIONS) AND WITHOUT SHEAR WALLS

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Shaikh Jafar Shaikh Ismail ◽  
L. G. Patil
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Lateral Stiffness ◽  
Lateral Loads ◽  
Dead Load ◽  
Flat Slab ◽  
Variable Parameters ◽  
High Rise ◽  
Main Factors ◽  
Seismic Investigation

In present era, there is a huge scarcity of vacant land led to the development of the high rise structures. For the construction of high rise buildings, normal R.C.C. system is not suitable. These problems can overcome by using flat slab system along with shear wall arrangements. It is very essential that the shear wall position should be appropriate in structure so as to achieve the lateral stiffness and solid structure against lateral loads. In this work, two main factors i.e. with drop panels and without drop panels have been considered for 12 storey structures. In each factor 5 models of various locations of shear wall is taken for consideration. For stabilization of variable parameters such as storey displacement, storey stiffness and storey shear etc the seismic investigation & design of structures had carried out in software ETABS. After performing seismic investigation & design of all the structures, result shows that if we provide shear wall at incorrect or inappropriate locations then it will only increase the dead load and cost of the structure. So the final outcomes we have achieved is to provide shear walls at desired position where lateral loads are more predominantly acting on the structures

Seismic Performance of Precast Concrete Composite Shear Walls with Multiple Boundary Elements

2019 ◽  
Vol 13 (03n04) ◽  
pp. 1940006
Author(s):  
W. C. Xue ◽  
Y. Li ◽  
L. Cai ◽  
X. Hu
Keyword(s):  
Precast Concrete ◽  
Shear Walls ◽  
Boundary Elements ◽  
Shear Wall ◽  
Control Specimen ◽  
Test Results ◽  
Out Of Plane ◽  
Loading Tests ◽  
Composite Shear ◽  
Scale Shear

Compared with traditional precast concrete composite shear walls (PCCSWs) with two boundary elements adjacent to edges, the PCCSWs with multiple boundary elements investigated in this paper have extra boundary elements at the intersections with other shear walls. In this paper, low reversed cyclic loading tests were conducted on three full-scale shear wall specimens with multiple boundary elements under in-plane loading and two full-scale shear wall specimens under out-of-plane loading. The in-plane loaded specimens included a PCCSW with double precast layers (i.e. precast concrete double skin shear wall, PCDSSW), a PCCSW with single precast layer, and a cast-in-pace (CIP) control specimen, whereas the out-of-plane loaded specimens included a PCDSSW and a CIP control specimen. Test results revealed that all specimens failed in bending. The hysteresis loops of the precast composite specimens were stable but slightly pinching, which were similar to those of the corresponding CIP control specimen. Compared with the CIP specimens, the PCDSSWs showed similar energy dissipation. The loading capacity of the precast composite specimens was generally a little lower than that of the corresponding CIP specimen with difference not more than 15%. In the in-plane loading tests, the PCDSSW reached higher displacement ductility (2.45) than the CIP specimen (1.88), whereas the ductility of the PCCSW with single precast layer was relatively low. Regarding the specimens under out-of-plane loading, the ductility of the PCDSSW (3.83) was close to that of the CIP specimen (3.02). Moreover, the stiffness degradation of the precast composite specimens was found to be comparable to that of the control specimens. Based on the test results, a restoring force model was developed.

Calculation on the Vertical Cracking Load of Adaptive-Slit Shear Walls

2012 ◽  
Vol 166-169 ◽  
pp. 2924-2928
Author(s):  
Ming Jin Chu ◽  
Yufeng Zhang ◽  
Zhi Juan Sun
Keyword(s):  
Seismic Behavior ◽  
Steel Sheet ◽  
Mechanical Characteristics ◽  
Experimental Studies ◽  
Shear Walls ◽  
Shear Wall ◽  
Experimental Results ◽  
Loading Process ◽  
Cold Formed Steel ◽  
Good Agreement

Experimental studies showed that vertical cracks appeared along the cold-formed steel or the steel sheet on the adaptive-slit shear walls when the wall was subjected to horizontal earthquake loading, and the adaptive-slit shear wall experienced the loading process from the whole wall section to the slitted wall section. So the appearance and development of the vertical cracks can reflect the seismic behavior of adaptive-slit shear walls. According to the mechanical characteristics of the adaptive-slit shear walls, this paper proposed a method to calculate the cracking load. It is found that the calculated results has a good agreement with the experimental results.

Research on Defect and Adjustment of Complex Shear Wall Partitioned Design Method

2011 ◽  
Vol 243-249 ◽  
pp. 980-984
Author(s):  
Xue Yi Fu ◽  
Jia Xin Qu
Keyword(s):  
Axial Compression ◽  
Compression Ratio ◽  
Design Method ◽  
Concrete Strength ◽  
Shear Walls ◽  
Shear Wall ◽  
Axial Compression Ratio ◽  
Complex Shear ◽  
Section Design ◽  
Effective Flange Width

Both reference [1~2] method and partitioned design method (GB 50010-2002) were adopted to design complex shear walls, and some factors such as axial compression ratio, reinforcing ratio, section dimension, concrete strength grade and effective flange width were considered, then their limited loading capacity would be compared with each other when axial force was considered as a fixed value. It was found that there were some defects of complex shear wall partitioned design method. And its applied conditions were suggested, which included section restricted condition and limited value of axial compression ratio. When these conditions couldn’t be satisfied, the adjusted reinforcement partitioned design method of reference [3] was suggested. If the uneconomical problem of partitioned design method could not be accepted, whole section design method of reference [1~2] would be suggested.

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