scholarly journals Simplified Analytical Model and Shaking Table Test Validation for Seismic Analysis of Mid-Rise Cold-Formed Steel Composite Shear Wall Building

2018 ◽  
Vol 10 (9) ◽  
pp. 3188 ◽  
Author(s):  
Jihong Ye ◽  
Liqiang Jiang
Keyword(s):  
Energy Dissipation ◽  
Shaking Table Test ◽  
Time History ◽  
Shear Wall ◽  
Shaking Table ◽  
Simplified Model ◽  
Composite Shear Wall ◽  
New Material ◽  
Composite Shear ◽  
Floor System

To develop the cold-formed steel (CFS) building from low-rise to mid-rise, this paper proposes a new type of CFS composite shear wall building system. The continuous placed CFS concrete-filled tube (CFRST) column is used as the end stud, and the CFS-ALC wall casing concrete composite floor is used as the floor system. In order to predict the seismic behavior of this new structural system, a simplified analytical model is proposed in this paper, which includes the following. (1) A build-up section with “new material” is used to model the CFS tube and infilled concrete of CFRST columns; the section parameters are determined by the equivalent stiffness principle, and the “new material” is modeled by an elastic-perfect plastic model. (2) Two crossed nonlinear springs with hysteretic parameters are used to model a composite CFS shear wall; the Pinching04 material is used to input the hysteretic parameters for these springs, and two crossed rigid trusses are used to model the CFS beams. (3) A linear spring is used to model the uplift behavior of a hold-down connection, and the contribution of these connections for CFRST columns are considered and individually modeled. (4) The rigid diaphragm is used to model the composite floor system, and it is demonstrated by example analyses. Finally, a shaking table test is conducted on a five-story 1:2-scaled CFS composite shear wall building to valid the simplified model. The results are as follows. The errors on peak drift of the first story, the energy dissipation of the first story, the peak drift of the roof story, and the energy dissipation of the whole structure’s displacement time–history curves between the test and simplified models are about 10%, and the largest one of these errors is 20.8%. Both the time–history drift curves and cumulative energy curves obtained from the simplified model accurately track the deformation and energy dissipation processes of the test model. Such comparisons demonstrate the accuracy and applicability of the simplified model, and the proposed simplified model would provide the basis for the theoretical analysis and seismic design of CFS composite shear wall systems.

Shaking Table Test Study of Reinforced Concrete Shear Wall Structure

2017 ◽  
Vol 865 ◽  
pp. 306-312
Author(s):  
Zheng Li ◽  
Heng Zhou ◽  
Li Qin
Keyword(s):  
Numerical Analysis ◽  
Dynamic Characteristics ◽  
Shaking Table Test ◽  
Time History ◽  
Shear Wall ◽  
Shaking Table ◽  
Wall Structure ◽  
Model Structure ◽  
Fixed Base ◽  
Time History Response

A reduced-scale model of 7-story reinforced concrete shear wall structure is made. Shaking-table test of the model is carried out. Two test conditions are considered. In the first condition, fixed base is used. In another condition, soil structure interaction is considered. According to the experimental results, the dynamic characteristic and seismic performance of shear wall structure is studied. The acceleration time history response of model structure is obtained. Based on the time-history response, the dynamic characteristics of model structure are studied by spectrum analysis. The Finite Element Model of actural structure is established by ANSYS. The dynamic characteristics and seismic performance of actural structure are studied. By comparing the experiment results and numerical analysis results under the fixed-base condition, the rationality of the ANSYS model and numerical analysis method of are verified.

scholarly journals BEHAVIOR OF STEEL PLATE-CONCRETE COMPOSITE SHEAR WALL UNDER CYCLIC LOADING

2021 ◽  
Vol 11 (4) ◽  
pp. 292-310
Author(s):  
Tadele Ergete Tadesse ◽  
Temesgen Wondimu Aure
Keyword(s):  
Energy Dissipation ◽  
Steel Plate ◽  
Load Capacity ◽  
Concrete Strength ◽  
Shear Wall ◽  
Steel Grade ◽  
Composite Shear Wall ◽  
Ductility Factor ◽  
Energy Dissipation Capacity ◽  
Composite Shear

Steel-Concrete composite shear wall has become popular recently as it compensates for the disadvantages of concrete and steel plate shear walls and combine the advantage of both. However, there is no detail study that identifies the most critical parameters. This study aims at investigation of steel plate-concrete composite shear wall behavior under cyclic loading with variables such as concrete strength, grade of steel plate, total number of tie constraints and thickness of steel plate. ABAQUS/Standard is used for numerical modeling in this study. As the concrete strength decreases from 86.1Mpa to 45Mpa, the load capacity declined by 11.76% and higher stiffness was recorded in specimen with higher grade of concrete. The ductility factor is inversely proportional to grade of concrete from 86.1Mpa to 60Mpa which increases from 4.26 to 4.68 and the ductility factor of specimen with 45Mpa strength is recorded as 3.81. The energy dissipation capacity is directly proportional to the grade of concrete used. Using high grade steel plate increases the lateral load capacity significantly and exhibited more ductile behavior. Specimen with S355 steel grade exhibited 14.01% increment of the average load capacity while the specimen with S245 steel grade has shown reduction by 9.21%. Similarly, the ductility factor and energy dissipation capacity of specimen with variable grade of steel are directly proportional. Reduction of tie constraints has no significant effect on the behavior in this study due to high confinement effect of concrete by surrounding steel plate. Specimens with thicker steel plate exhibited good energy dissipation capacity.

scholarly journals Experimental Study on Seismic Behavior of Composite Shear Wall with Inclined Bars

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Y. L. Wang ◽  
D. D. Hu ◽  
B. Fang
Keyword(s):  
Energy Dissipation ◽  
Thermal Insulation ◽  
Failure Modes ◽  
Shear Wall ◽  
Sound Insulation ◽  
Composite Shear Wall ◽  
Composite Wall ◽  
Energy Dissipation Capacity ◽  
Door Frame ◽  
Composite Shear

The composite shear wall is the core component of the thermal insulation integrated structure, which is a load-bearing shear wall with good thermal insulation, sound insulation, and seismic resistance. To improve the applicable height of the composite shear wall structure, a cohesive sandwich heat-insulation composite shear wall with door frame inclined tendon and diamond-shaped inclined tendon is proposed, and the quasistatic force of four 1/2-scale shear wall test specimens is carried out. Different specimens are analyzed, including failure modes, hysteresis curves, skeleton curves, stiffness degradation, ductility performance, and energy dissipation capacity. The following conclusions are drawn: the failure modes of the specimens are bending and shear failure; the ultimate strength and deformation performance of the composite wall close to the solid wall; the composite wall with the door frame inclined tendon can effectively delay the wall cracking and improve the bearing capacity and energy consumption capacity of the composite wall; the configuration of the diamond-shaped inclined tendon improves the ductility and energy dissipation capacity of the composite wall.

scholarly journals Seismic Behavior of the Low-rise Shear Wall with CFST Frame and Embedded Steel-plate

2015 ◽  
Vol 9 (1) ◽  
pp. 861-866 ◽  
Author(s):  
Wang Yaohong ◽  
Wu Dingyan ◽  
Cao Wanlin
Keyword(s):  
Seismic Behavior ◽  
Shaking Table Test ◽  
Steel Plate ◽  
Time History ◽  
Shear Wall ◽  
Shaking Table ◽  
History Analysis ◽  
Plastic Stage ◽  
Reduced Scale ◽  
Elastic Stage

In this paper, two low-rise shear wall specimens are tested on the shaking table, one is shear wall with CFST frame and embedded steel-plate, the other one is no concrete outside the steel-plate in comparison of the first one. The reduced scale of the two specimens is 1/12. The seismic wave “Taft” is input in the shaking table test. Based on the experiment, the author conducts the time history analysis (including elastic stage and plastic stage) of the specimens. The calculated results and measured results are compared.

Experimental study on seismic behaviors of the welded L-shaped double steel plate-concrete composite shear wall

2021 ◽  
Vol 187 ◽  
pp. 106944
Author(s):  
Wenhui He ◽  
Yikun Wan ◽  
Yuyu Li ◽  
JinBin Bu ◽  
Jianliang Deng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Steel Plate ◽  
Shear Wall ◽  
Composite Shear Wall ◽  
Composite Shear ◽  
Seismic Behaviors

Shear strength of steel plate reinforced concrete shear wall

2020 ◽  
Vol 23 (8) ◽  
pp. 1629-1643
Author(s):  
Zhi Zhou ◽  
Jiang Qian ◽  
Wei Huang
Keyword(s):  
Finite Element ◽  
Shear Strength ◽  
Reinforced Concrete ◽  
Steel Plate ◽  
Shear Wall ◽  
American Institute ◽  
Composite Shear Wall ◽  
Steel Construction ◽  
Composite Shear ◽  
Modified Formula

This article investigates the shear strength of steel plate reinforced concrete shear wall under cyclic loads. A nonlinear three-dimensional finite element model in ABAQUS was developed and validated against published experimental results. Then, a parametric study was conducted to evaluate the effects of the parameters on the lateral capacity of composite shear wall, including shear span ratio, concrete strength, axial load ratio, steel plate ratio and transverse reinforcement ratio of the web. Furthermore, a modified formula of shear strength of composite shear wall was proposed. Regression analyses were used to obtain the contribution coefficients of different parts from 720 finite element models. Finally, the shear strengths of specimens from published tests were compared with design strengths calculated using the proposed formula, American Institute of Steel Construction Provisions and Chinese Code. It was found that the Chinese Code well predicts the shear strength of composite shear wall of a steel plate ratio of less than 5%, while unsafely predicting that of a higher steel plate ratio. The American Institute of Steel Construction Provisions predictions are quite conservative because the contribution of the reinforced concrete is neglected. The modified formula safely predicts the shear strength of composite shear wall.

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