scholarly journals Behavior and Design of Transfer Slabs Subjected to Shear Wall Loads

2021 ◽  
Author(s):  
Alonso Gómez-Bernal ◽  
Eduardo Arellano Méndez ◽  
Luis Ángel Quiroz-Guzmán ◽  
Hugón Juárez-García ◽  
Oscar González Cuevas
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Models ◽  
Numerical Models ◽  
Masonry Wall ◽  
Concrete Wall ◽  
Concrete Girders ◽  
Fixed Base ◽  
Reinforced Concrete Wall ◽  
Numerical Finite Element ◽  
The One

This paper investigates the behavior of a transfer slab system used in medium rise building. For this purpose, two slab-wall full-scale specimens were designed, built, and tested to cyclic loads. The two slab-wall prototypes were exposed to three load stages: (a) vertical load, (b) horizontal load, and (c) vertical and horizontal combined load. The first specimen, SP1, includes a masonry wall situated on top of a squared two-way slab of 4.25 m by side, thickness of 12 cm, on four reinforced concrete girders, while the second specimen, SP2, consists of an identical slab but was constructed with a reinforced concrete wall. Some numerical finite element slab-wall models were built using linear and nonlinear models. The most important results presented herein are the change on lateral stiffness and resistance capacity of the load-bearing wall supported on a slab versus the wall supported on a fixed base and the effects that these walls cause on the slabs. During the experimental test process of horizontal loading, we detected that the stiffness of the two slab-wall systems decreased significantly compared to the one on the fixed base wall, a result supported by the numerical models. The models indicated suitable correlation and were used to conduct a detailed parametric study on various design configurations.

Anti-Seismic Analysis of Masonry-Reinforced Concrete Structure Based on LS-DYNA

2011 ◽  
Vol 99-100 ◽  
pp. 870-874
Author(s):  
Xiao Bin Liu ◽  
Guo Ping Chen
Keyword(s):  
Reinforced Concrete ◽  
Composite Structure ◽  
Seismic Analysis ◽  
Shear Wall ◽  
Masonry Wall ◽  
Reinforced Concrete Structure ◽  
Concrete Wall ◽  
Earthquake Load ◽  
Reinforced Concrete Wall ◽  
Combined Structure

composite structure of masonry wall and reinforced concrete wall as A new type of structure, With masonry structure is adopted for the subject, Proper Settings of reinforced concrete shear wall part of combined structure system, It mainly by shear deformation of masonry and bending deformation of reinforced concrete shear wall is mainly composed LS-DYNA, software of finite element, is used to study the structure, simulations of the response procedures of composite structure under earthquake load are made, as well as the destruction of composite structure. According to calculation and analysis, it can be known that this kind of composite structure can obviously improve seismic resistant capability, and the level of destruction is relative smaller, which can meet the requirements for fortification against earthquake that is "keeping intact in minor earthquakes, repairable in medium earthquakes, standing upright in major earthquakes"

Experimental Study on Thermal Conductivity of Concrete for Building Reinforced Concrete Composite Wall

2013 ◽  
Vol 438-439 ◽  
pp. 329-332 ◽  
Author(s):  
Mei Jun Lu ◽  
Su Yang ◽  
Xue Zhen Feng ◽  
Shun Bo Zhao
Keyword(s):  
Thermal Conductivity ◽  
Reinforced Concrete ◽  
Volume Fraction ◽  
Volume Ratio ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Concrete Wall ◽  
Reinforced Concrete Wall ◽  
Composite Wall ◽  
The One

In order to determine the thermal conductivity of the concrete for building reinforced concrete composite wall, the fine-aggregate concrete for the thermal insulation layer and the composite concrete for the reinforced concrete wall were made from the ordinary concrete by in-situ wet-sieving techniques. The compositions of these three kinds of fresh concrete were determined, which expressed by the volume fraction of crushed stone and the volume ratio of crushed stone to mortar. The thermal conductivity of concrete was measured by the one-dimensional steady heat flow meter. Based on the tests, the changes of thermal conductivity of concrete affected by the volume fraction of crushed stone and the volume ratio of crushed stone to mortar were analyzed. The correlation analysis shows that the correlation of the thermal conductivity is better with the volume ratio of crushed stone to mortar. The formula for forecasting the thermal conductivity of concrete is proposed.

scholarly journals Experimental behavior of a masonry wall supported on a RC twoway slab

DYNA ◽  
2015 ◽  
Vol 82 (194) ◽  
pp. 96-103 ◽  
Author(s):  
Alonso Gómez Bernal ◽  
Daniel A. Manzanares-Ponce ◽  
Omar Vargas-Arguello ◽  
Eduardo Arellano-Méndez ◽  
Hugón Juárez-García ◽  
...  
Keyword(s):  
Numerical Models ◽  
Shear Walls ◽  
Masonry Wall ◽  
Concrete Slabs ◽  
Lateral Stiffness ◽  
Fixed Base ◽  
The One ◽  
Key Aspects ◽  
Wall System ◽  
Test Process

This paper discusses the experimental results of a prototype slab-wall that is subjected to vertical and horizontal cyclic loading. The key aspects under discussion are: (a) the differences between the capacity resistance of a wall supported on a slab vs. a wall supported on a fixed base, (b) the implications when shear walls are placed directly on transfer concrete slabs, and (c) the effects that these walls cause on the slabs. The most important results presented herein are the change on lateral stiffness and resistance capacity of the load-bearing wall supported on a slab versus the wall supported on a fixed base. Analytical finite element slab-wall models were built using ANSYS. During the experimental test process of horizontal loading, we detected that the stiffness of the slab-wall system decreased by a third compared to the one on the fixed base wall; a result that supported by the numerical models.

Performance of Masonry Walls Strengthened with RC Wall Jacket Subjected to Simulated Blast Loads

2017 ◽  
Vol 755 ◽  
pp. 8-17
Author(s):  
Mohamed Abdel-Mooty ◽  
Sayed Alhayawei ◽  
Mohamed Issa
Keyword(s):  
Reinforced Concrete ◽  
Critical Infrastructure ◽  
Blast Loading ◽  
Masonry Wall ◽  
Design Parameters ◽  
Masonry Walls ◽  
Blast Loads ◽  
Concrete Wall ◽  
Blast Effect ◽  
Reinforced Concrete Wall

Mitigation of the blast risk associated with terrorist attacks and accidental explosions threatening critical infrastructure has become a topic of great interest in the civil engineering community, all over the world. One method of mitigating blast risk is to retrofit vulnerable structures to resist the impulsive effects of blast loading. Masonry is one of the most commonly used materials particular in heritage buildings. An effective way to enhance the ability of unreinforced masonry walls to withstand blast loads and consequently to limit the amount of wall damage is strengthening it with reinforced concrete wall. In this research, the assembly of masonry wall with RC wall jacket from one side is simulated using nonlinear finite element method and ANSYS WORKBENCH V14.5 program to study its behavior under blast loading. A parametric study is performed where the influence of variation of some design parameters on the wall performance under blast effect is studied. The design parameters include masonry wall and RC wall thickness, interface between the two wall layers, stand-off distance, boundary condition, and reinforced concrete compressive strength. The performance of the strengthened walls is evaluated in terms of wall damage, maximum lateral deflection, and end rotation at the support.

scholarly journals Displacement-Based Seismic Assessment of the Likelihood of Failure of Reinforced Concrete Wall Buildings

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 295
Author(s):  
Amirhossein Orumiyehei ◽  
Timothy J. Sullivan
Keyword(s):  
Reinforced Concrete ◽  
Seismic Risk ◽  
Concrete Wall ◽  
Limit States ◽  
Simplified Approach ◽  
Performance Based Assessment ◽  
Assessment Approach ◽  
Reinforced Concrete Wall ◽  
Displacement Based ◽  
Assessment Procedures

To strengthen the resilience of our built environment, a good understanding of seismic risk is required. Probabilistic performance-based assessment is able to rigorously compute seismic risk and the advent of numerical computer-based analyses has helped with this. However, it is still a challenging process and as such, this study presents a simplified probabilistic displacement-based assessment approach for reinforced concrete wall buildings. The proposed approach is trialed by applying the methodology to 4-, 8-, and 12-story case study buildings, and results are compared with those obtained via multi-stripe analyses, with allowance for uncertainty in demand and capacity, including some allowance for modeling uncertainty. The results indicate that the proposed approach enables practitioners to practically estimate the median intensity associated with exceeding a given mechanism and the annual probability of exceeding assessment limit states. Further research to extend the simplified approach to other structural systems is recommended. Moreover, the research highlights the need for more information on the uncertainty in our strength and deformation estimates, to improve the accuracy of risk assessment procedures.

Performance of a reinforced concrete wall building subjected to sequential earthquake and tsunami loading

2021 ◽  
Vol 238 ◽  
pp. 111995
Author(s):  
S.J. Tagle ◽  
R. Jünemann ◽  
J. Vásquez ◽  
J.C. de la Llera ◽  
M. Baiguera
Keyword(s):  
Reinforced Concrete ◽  
Concrete Wall ◽  
Reinforced Concrete Wall
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