scholarly journals Structural Design and Modelling Method for the Post-tensioned CLT Shear Wall Structures

2019 ◽  
pp. 84-91
Author(s):  
Minjuan He ◽  
Xiaofeng Sun ◽  
Zheng Li
Keyword(s):  
Numerical Models ◽  
Shear Walls ◽  
Shear Wall ◽  
Cumulative Distribution ◽  
Structural Performance ◽  
Base Shear ◽  
Modelling Method ◽  
Wall Structures ◽  
Study Results ◽  
Post Tensioned

This paper presents the direct displacement-based design (DDD) procedure, structural modelling method, and structural performance calibration for post-tensioned CLT shear wall structures (PT-CLTstrs). Numerical models of the post-tensioned (PT) CLT shear walls were developed and calibrated with the experimental results. Based on the developed shear wall models, parametric analysis were conducted to investigate the lateral performance influencing factors. Then, a DDD procedure was developed and demonstrated by the design examples of a set of 8-, 12-, and 16-storey PT-CLTStrs. The corresponding simplified structural models were developed, and then a series of pushover and time-history dynamic analysis were conducted to calibrate the calculated structural performance objectives with the design targets of the DDD procedure. Finally, the empirical cumulative distribution functions (CDFs) of the maximum inter-storey drift (MaxISDR) were constructed. It is found that when the width of the PT CLT shear walls increases from 1.8 m to 3.0 m, the base shear at the drift of 2.0 % increases by twice accordingly. When the diameter of the PT strand increases from 15.2 mm to 34.6 mm, the base shear at the drift of 2.0 % increases by up to five times. Additionally, the MaxISDR limitation of the PT-CLTStrs is recommended as 2.2 % under the collapse prevention (CP) hazard level. The study results can serve as guidelines for the development of engineering design methods for the PT-CLTStrs.

scholarly journals Effect of Location of Shear wall on Torsional Performance of Symmetric and Asymmetric High Rise Building

2021 ◽  
Vol 9 (VI) ◽  
pp. 5237-5243
Author(s):  
Hridya. K
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Lateral Loads ◽  
Base Shear ◽  
Flat Slab ◽  
High Rise ◽  
High Rise Building ◽  
Wide Range ◽  
The Cost ◽  
Post Tensioned

Torsion force is a load that is a applied to a building through torque. The torque applied creates a shear stress. If a torsion force is large enough, it can cause a building to undergo a twisting action. The main aim of the project is to study the effect of location of shear wall on torsional performance of symmetric and asymmetric high-rise building ,post tensioned slabs are being used in the construction of building hence the thesis also analyze these post tensioned slab structures by changing shear wall configuration. Post tensioned slab structures have weak resistance to lateral loads. so to provide stiffness to structures against lateral forces shear walls are used. A study of 30 storey building in zone III, is considered and determine various parameters like base shear, storey drift, and storey displacement.post-tensioning is a mature technology as it provide efficient, economic and elegant structural solutions for a wide range of applications. Post-tensioned flat slab could be a better option compared to RCC flat slab, in respect of the cost of project and time of construction. ETABS 2017 software is used for the analysis.

Study on the shear wall structure with combined form of replaceable devices

2017 ◽  
Vol 21 (9) ◽  
pp. 1327-1348
Author(s):  
Cong Chen ◽  
Renjie Xiao ◽  
Xilin Lu ◽  
Yun Chen
Keyword(s):  
Shear Walls ◽  
Shear Wall ◽  
Performance Comparison ◽  
Wall Structure ◽  
Structural Part ◽  
Coupled Shear Wall ◽  
Wall Structures ◽  
Strength And Stiffness ◽  
Energy Dissipated ◽  
Resilient Structure

Structure with replaceable devices is a type of earthquake resilient structure developed to restore the structure immediately after strong earthquakes. Current researches focus on one type of the replaceable device located in the structural part that is most likely to be damaged; however, plastic deformation would not be limited in a specific part but expand to other parts. To concentrate possible damage in shear wall structures, combined form of replaceable devices was introduced in this article. Based on previous studies, combined form of replaceable coupling beam and replaceable wall foot was used in a coupled shear wall. Influences of the dimension and location of the replaceable devices to the strength and stiffness of the shear wall were investigated through numerical modeling, which was verified by experimental data. Performance comparison between the shear walls with one type and combined form of replaceable devices and the conventional coupled shear wall was performed. In general, the shear wall with combined form of replaceable devices is shown to be better energy dissipated, and proper dimensions and locations of the replaceable devices should be determined.

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.

Nonlinear Dynamic Analysis of Prefabricated Concrete Shear Wall Structure under Seismic Excitation

2017 ◽  
Vol 873 ◽  
pp. 259-263
Author(s):  
Hao Zhang ◽  
Zi Hang Zhang ◽  
Yong Qiang Li
Keyword(s):  
Finite Element ◽  
Kinematic Hardening ◽  
Nonlinear Dynamic Analysis ◽  
Shear Wall ◽  
Seismic Excitation ◽  
Wall Structure ◽  
Base Shear ◽  
Wall Structures ◽  
Story Drift

The dynamic behavior of the prefabricated and cast in situ concrete shear wall structures subjected to seismic loading is investigated by finite element method. This paper adopted a prefabricated concrete shear wall in a practical engineering. The Precise finite element models of prefabricated and cast in situ concrete shear wall were established respectively by ABAQUS. The damaged plasticity model of concrete and kinematic hardening model of reinforcing steel were used. The top displacement, top acceleration, story drift ratio and base shear forceof prefabricated and cast in situ concrete shear wall under different seismic excitation were compared and analyzed. The earthquake resistant behaviorsof the two kinds of structuresare analyzed and compared. Results show that the performances of PC structure were equal to the cast-in-situ ones.

Analogous frames for the analysis of tall shear wall structures

1981 ◽  
Vol 8 (2) ◽  
pp. 179-185 ◽  
Author(s):  
B. Stafford Smith ◽  
A. M. Girgis ◽  
A. Abate
Keyword(s):  
Finite Elements ◽  
Detailed Analysis ◽  
Shear Walls ◽  
Shear Wall ◽  
Frame Model ◽  
Wall Structures ◽  
Single Column ◽  
Deflection Analysis

Three types of analogous frames for the stress and deflection analysis of tall shear walls are presented. They are similar to the wide column analogous frame in having horizontal flexurally rigid arms; however, they avoid the coupling of the shear and contraflexural behaviour inherent in the single column of the wide column analogy. The new analogous frames are suitable for the detailed analysis of individual shear walls or of walls connected by beams to other components. In such combined structures a frame model may be more convenient than a mixture of finite elements and frame elements.

Research on Deformation Index Limits of RC Shear Walls Based on Material Damage

2014 ◽  
Vol 507 ◽  
pp. 322-327
Author(s):  
Yong Le Qi ◽  
Xin Xian Zhou ◽  
Can Dong Xie
Keyword(s):  
Seismic Performance ◽  
Shear Walls ◽  
Shear Wall ◽  
Mathematical Statistic ◽  
Material Damage ◽  
Seismic Evaluation ◽  
Deformation Index ◽  
Wall Structures ◽  
Displacement Angle ◽  
Seismic Deformation

This paper divides the seismic performance of shear wall into five levels: integrity, slight damage, slight ~ moderate damage and serious damage which are defined based on material damage. And physical and mechanical description of shear walls in each performance level is given. The displacement angle is selected as the seismic performance index limit. The numerical analysis of 524 pieces of shear walls has been made to discuss the influence on seismic deformation index limits of component according to axial compression ratio, flexure shear ratio, the nominal shear stress level, the hoop characteristic value and the reinforcement ratio of longitudinal bars. With mathematical statistic method, the calculation formula for deformation index limits of components is obtained, which can be used as the basis in the performance-based seismic evaluation of shear wall structures.

The Influence of Structural Damage on the Vibration Characteristics of Shear-Wall Buildings

2012 ◽  
Vol 193-194 ◽  
pp. 1216-1220 ◽  
Author(s):  
Kai Huang ◽  
Li Hua Zou ◽  
Jian Mei Chen
Keyword(s):  
Plastic Zone ◽  
Structural Damage ◽  
Pushover Analysis ◽  
Shear Walls ◽  
Shear Wall ◽  
Internal Force ◽  
Vibration Characteristics ◽  
Wall Structure ◽  
Wall Structures ◽  
The Continuum

To understand the higher modal effect on the accuracy of pushover analysis for shear wall structure, the influence of damage on the vibration characteristics of shear-wall structures is investigated. Employing the continuum technique, the shift of modal shapes and periods for the first three modes is obtained when the plastic zone exists in the bottom of the shear wall. It can be conclude that plastic zone may enhance the higher modal effect when the internal force responses of shear walls are considered. The higher modal contribution can not be neglected when computing the nonlinear earthquake responses of shear wall structures.

scholarly journals Nonlinear analysis of reinforced concrete shear wall structures

2004 ◽  
Vol 37 (4) ◽  
pp. 156-180 ◽  
Author(s):  
Trevor Kelly
Keyword(s):  
Nonlinear Analysis ◽  
Shear Walls ◽  
Nonlinear Effects ◽  
Practical Method ◽  
Shear Wall ◽  
Load Resistance ◽  
Analysis Model ◽  
Building Models ◽  
Wall Structures ◽  
Lateral Load Resistance

Although shear walls are a widely used system for providing lateral load resistance, nonlinear analysis procedures for this type of element are much less well developed than those for frame and truss elements. Equivalent flexural models do not include shear deformation and are only suited for symmetric, straight walls. This paper describes the development of an analysis model which includes nonlinear effects for both shear and flexure. The formulation is based on a "macro" modelling approach which is suitable for complete building models in a design office environment. An analysis methodology is developed using engineering mechanics and experimental results and implemented in an existing nonlinear analysis computer program. A model is developed and validated against test results of solid walls and walls with openings. This shows that the model can capture the general characteristics of hysteretic response and the maximum strength of the wall. Results can be evaluated using acceptance criteria derived from published guidelines. An example shear wall building is then evaluated using both the nonlinear static and the nonlinear dynamic procedures. The procedure is shown to be a practical method for implementing performance based design procedures for shear wall buildings.

scholarly journals Effect of Shear Wall on RC Building of Varying Heights

2019 ◽  
Vol 8 (12) ◽  
pp. 766-770
Keyword(s):  
Aspect Ratio ◽  
Response Spectrum ◽  
Shear Walls ◽  
Shear Wall ◽  
Seismic Zone ◽  
Lateral Loads ◽  
Base Shear ◽  
Aspect Ratios ◽  
Rc Building ◽  
The Comparative Study

Earthquake is an unexpected and expensive disaster for both livelihood and economy. In the modern day construction, there has been a lot of importance to make the structure resistant against lateral loads for multi storied building. Shear walls are an option of lateral load resisting system. The Concept of designing shear wall is to provide building structure with sufficient strength and deformation capacity to sustain the demands imposed by lateral loads with adequate margin of safety. The study focuses on effect of shear wall on R.C. building at different heights. For this purpose five models of different heights 15m, 30m, 45m, 60m and 75m and with different aspect ratios of 1.33, 0.66, 0.44, 0.33 and 0.26 respectively have been considered. All the models were designed for seismic zone V. For analysis purpose response spectrum method of analysis is considered as per IS: 1893-2002. The comparative study has been done for base shear, storey displacement, storey drift and storey stiffness. Utilization of shear walls when placed at corners of the building of low aspect ratio in high rise buildings is more effective compared to the low rise buildings of higher aspect ratio, as it gives the larger base shear and lesser displacement. The storey stiffness and storey drift is greatly improved when shear wall is placed at corners of the building

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