scholarly journals Experimental Study on Precast Concrete Shear Walls with Different Hollow Slabs

2014 ◽  
Vol 8 (1) ◽  
pp. 166-171 ◽  
Author(s):  
Qinyan Zhao ◽  
Zhongyong Zhang ◽  
Jiliang Liu ◽  
Mingjin Chu
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Failure Mode ◽  
Shear Failure ◽  
Precast Concrete ◽  
Shear Walls ◽  
Test Results ◽  
Mechanical Behaviors ◽  
Low Cyclic Loading

To study mechanical behaviors of shear walls built with precast two-way hollow slabs, two shear walls with different details of hollow slabs were quasi-statically tested under low cyclic loading. The failure mode was analyzed, which vertical macro-cracks appeared on walls due to the details of hollow slabs. Brittle shear failure can be avoided in terms of the failure behaviors evolved from integral wall to the combination of wall and columns. Test results also show that that dimension of transverse holes can affect compressive capacity of the walls when it is larger than that of longitudinal holes in the hollow slab.

Experimental Study on Mechanical Behaviors of Precast Concrete Shear Wall with Vertical Joint

2014 ◽  
Vol 584-586 ◽  
pp. 1299-1303 ◽  
Author(s):  
Qin Yan Zhao ◽  
Zhong Yong Zhang ◽  
Guang Ming Qiu ◽  
Ji Liang Liu ◽  
Ming Jin Chu
Keyword(s):  
Shear Failure ◽  
Precast Concrete ◽  
Failure Process ◽  
Peak Load ◽  
Shear Walls ◽  
Shear Wall ◽  
Failure Behavior ◽  
Relative Deformation ◽  
Mechanical Behaviors ◽  
Vertical Joint

Precast two-way hollow slab concrete shear wall is a new structure adapted to housing industrialization. To study the effect of the vertical joint on mechanical behaviors of shear walls, one reinforced concrete shear wall and two precast concrete shear walls built with hollow slabs were quasi-statically tested under low cyclic loading. The study of failure mode and failure process of specimens shows that vertical macro-cracks occurred in precast walls under loading, which made failure behavior of walls evolve from integral wall into split wall. It also shows that relative deformation formed along the vertical joint before peak load, so the ductility of walls is increased. New type shear walls exhibit good ductility and brittle shear failure can be avoided effectively.

scholarly journals Experimental Study on Flexural Behavior of Precast Concrete Shear Walls with Vertical Joint

2017 ◽  
Vol 11 (1) ◽  
pp. 955-964
Author(s):  
Guangming Qiu ◽  
Jiliang Liu ◽  
Mingjin Chu ◽  
Gang Wang ◽  
Muhe Liu
Keyword(s):  
Experimental Study ◽  
Precast Concrete ◽  
Shear Walls ◽  
Shear Wall ◽  
Flexural Behavior ◽  
Good Ability ◽  
Earthquake Load ◽  
Low Cyclic Loading ◽  
Vertical Joint

Background: To study the flexural behaviors of the concrete shear walls with precast hollow slab, one cast in-situ reinforced concrete shear wall and two precast two-way hollow slab shear walls (PTHSWs) vertical joint were tested under low cyclic loading. Objective: The study showed that vertical joints of PTHSW are safe and reliable to ensure the effective connection between the assembly units. The ductility coefficient of shear wall is larger than 7, so this kind of shear wall has good ability of deformation especially under earthquake load. Results: The interface can effectively ensure the integral performance of PTHSWs and its effect on the flexural behaviors of PTHSWs could be ignored.

Machine learning-based failure mode identification of RCSPSW

2021 ◽  
Author(s):  
Dongqi Jiang ◽  
Shanquan Liu ◽  
Tao Chen ◽  
Gang Bi
Keyword(s):  
Machine Learning ◽  
Failure Mode ◽  
Failure Modes ◽  
Shear Failure ◽  
Tall Buildings ◽  
Shear Walls ◽  
Superior Performance ◽  
Ann Model ◽  
Mode Recognition ◽  
Wide Range

<p>Reinforced concrete – steel plate composite shear walls (RCSPSW) have attracted great interests in the construction of tall buildings. From the perspective of life-cycle maintenance, the failure mode recognition is critical in determining the post-earthquake recovery strategies. This paper presents a comprehensive study on a wide range of existing experimental tests and develops a unique library of 17 parameters that affects RCSPSW’s failure modes. A total of 127 specimens are compiled and three types of failure modes are considered: flexure, shear and flexure-shear failure modes. Various machine learning (ML) techniques such as decision trees, random forests (RF), <i>K</i>-nearest neighbours and artificial neural network (ANN) are adopted to identify the failure mode of RCSPSW. RF and ANN algorithm show superior performance as compared to other ML approaches. In Particular, ANN model with one hidden layer and 10 neurons is sufficient for failure mode recognition of RCSPSW.</p>

Experimental Study on the Structural Performance of Beam-Column Joints in Old Buildings without Designed Shear Reinforcement under Earthquake

2017 ◽  
Vol 902 ◽  
pp. 33-40
Author(s):  
Cong Thuat Dang ◽  
Ngoc Hieu Dinh
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Shear Failure ◽  
Test Results ◽  
Shear Reinforcement ◽  
Reinforcing Bars ◽  
Reinforced Concrete Buildings ◽  
Concrete Buildings ◽  
Gravity Load ◽  
Load Beam

Old reinforced concrete buildings constructed around 1980’s in many developing countries have been designed against mainly gravity load. Beam-column joints in these buildings contain slightly or no shear reinforcement inside the panel zones due to the construction convenience, and are vulnerable to shear failure in beam-column joints under the action of earthquake loads, especially for the exterior beam-column joints. This experimental study aimed to investigate the seismic performance of five half-scale exterior beam-column joints simulating the joints in existing reinforced-concrete buildings with non-shear hoop details. The test results showed that the structural performances of the beam-column joints under earthquake including failure mode, load-drift ratio relationship, shear strain of the joints and energy dissipation are strongly affected by the amount of longitudinal reinforcing bars of beams.

Stiffness degradation of shear walls under cyclic loading: experimental study and modelling

2019 ◽  
Vol 17 (9) ◽  
pp. 5183-5216 ◽  
Author(s):  
Xiangyong Ni ◽  
Shuangyin Cao ◽  
Yizhu Li ◽  
Shuai Liang
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Shear Walls ◽  
Stiffness Degradation

Experimental study on PVC-CFRP confined concrete columns under low cyclic loading

2018 ◽  
Vol 177 ◽  
pp. 287-302 ◽  
Author(s):  
Feng Yu ◽  
Guoshi Xu ◽  
Ditao Niu ◽  
Anchun Cheng ◽  
Ping Wu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Concrete Columns ◽  
Confined Concrete ◽  
Low Cyclic Loading

Experimental Investigations on the Seismic Behavior of Precast Concrete Columns with Novel Box Connections

2019 ◽  
Vol 14 (02) ◽  
pp. 2050007
Author(s):  
Xizhi Zhang ◽  
Shengbo Xu ◽  
Shaohua Zhang ◽  
Gaodong Xu
Keyword(s):  
Energy Dissipation ◽  
Bearing Capacity ◽  
Failure Mode ◽  
Seismic Behavior ◽  
Load Transfer ◽  
Precast Concrete ◽  
Hysteretic Behavior ◽  
Experimental Investigations ◽  
Test Results ◽  
Energy Dissipation Capacity

In this study, two types of novel box connections were developed to connect precast concrete (PC) columns and to ensure load transfer integrity. Cyclic loading tests were conducted to investigate the seismic behavior of the PC columns with proposed connections as well as the feasibility and reliability of novel box connections. The failure mode, hysteretic behavior, bearing capacity, ductility, stiffness degradation and energy dissipation were obtained and discussed. The test results indicated that the all PC columns exhibited the ductile flexural failure mode and that the proposed connections could transfer the force effectively. The adoption of novel box connections could improve the deformation capacity and energy dissipation capacity of PC columns. A higher axial compression ratio could enhance the bearing capacity of PC column with proposed connection but would significantly deteriorate the ductility and energy dissipation capacity. Finite element models were developed and the feasibility of the models was verified by the comparison with the test results.

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