Seismic behavior of confined masonry walls subjected to freeze-thaw cycles

This paper presents the results of a study on the out-of-plane seismic behavior of confined masonry walls. Five confined walls were tested under reverse cyclic loads. The variables studied were the axial stress and the wall aspect ratio. Analytical out-of-plane strength of walls was calculated considering the strengths of the wall panel and the concrete confining elements. The former was determined using the unidirectional strut method and the latter using a plastic analysis. It was observed that for walls with the same aspect ratio, as the axial stress increases, the out-of-plane strength increases. For walls with the same axial stress, as the aspect ratio increases, the strength decreases. Based on comparisons between analytical and experimental results, it was concluded that the models developed in this work predict accurately the out-of-plane strength of the walls.

Download Full-text

Experimental Study on Seismic Failure Modes of Confined Masonry Structures with Different Enhancements

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.747.594 ◽

2017 ◽

Vol 747 ◽

pp. 594-603 ◽

Cited By ~ 1

Author(s):

Hu Xu ◽

Hao Wu ◽

Cristina Gentilini ◽

Qi Wang Su ◽

Shi Chun Zhao

Keyword(s):

Experimental Study ◽

Failure Mode ◽

Seismic Behavior ◽

Failure Modes ◽

Experimental Results ◽

Masonry Walls ◽

Masonry Structures ◽

Structural Collapse ◽

Static Loads ◽

Confined Masonry

In this study, confined masonry specimens with regular arranged openings are tested in order to study the influence of different enhancements of the columns on seismic failure modes. In particular, five brick masonry walls and three half-scale two-storey masonry structures are tested under quasi-static loads. The experimental results show that increasing column ratio improves the seismic behavior of the wall specimens to some extent, but an excessive reinforcement ratio of the columns decreases the ductility. The global failure mode of the two-storey masonry structures is modified by inserting iron wires in the mortar bed joints, improving the structural collapse resistant capacity effectively.

Download Full-text

Seismic behavior of unreinforced and confined masonry walls using innovative sintered insulation shale blocks under cyclic in-plane loading

Construction and Building Materials ◽

10.1016/j.conbuildmat.2020.121063 ◽

2021 ◽

Vol 268 ◽

pp. 121063

Author(s):

Chaogang Qin ◽

Guoliang Bai ◽

Tao Wu ◽

Bo Wang ◽

Guangming Fu

Keyword(s):

Seismic Behavior ◽

Masonry Walls ◽

Confined Masonry

Download Full-text

Seismic Behavior of Brick Masonry Walls Strengthened with Different Types of Fiber Nets

Structural Engineering International ◽

10.1080/10168664.2021.1916419 ◽

2021 ◽

pp. 1-10

Author(s):

Zongcai Deng ◽

Minghua Chen ◽

Minggao Gong

Keyword(s):

Seismic Behavior ◽

Brick Masonry ◽

Masonry Walls ◽

Different Types

Download Full-text

Seismic behavior of masonry walls strengthened by precast reinforced concrete panels with different connection details

Engineering Structures ◽

10.1016/j.engstruct.2021.112597 ◽

2021 ◽

Vol 242 ◽

pp. 112597

Author(s):

Yongqun Zhang ◽

Xuchuan Lin ◽

Tao Wang ◽

Konstantinos Skalomenos

Keyword(s):

Reinforced Concrete ◽

Seismic Behavior ◽

Masonry Walls ◽

Concrete Panels

Download Full-text

In-plane response of unreinforced masonry walls confined by reinforced concrete tie-columns and tie-beams

Advances in Structural Engineering ◽

10.1177/1369433216689569 ◽

2017 ◽

Vol 20 (11) ◽

pp. 1632-1643 ◽

Cited By ~ 4

Author(s):

Masoud Amouzadeh Tabrizi ◽

Masoud Soltani

Keyword(s):

Numerical Study ◽

Nonlinear Behavior ◽

Numerical Approach ◽

Masonry Wall ◽

Masonry Walls ◽

Lateral Loads ◽

Confined Masonry ◽

Smeared Crack ◽

Modeling Strategy ◽

Reversed Cyclic

This article focuses on the experimental and analytical investigations of masonry walls surrounded by tie-elements under in-plane loads. The experimental results of an unconfined and a confined masonry wall, tested under reversed cyclic lateral loads, are presented. For numerical study, a micro-modeling strategy, using smeared-crack-based approach, is adopted. In order to validate the numerical approach, experimental test results and data obtained from the literature are used, and through a systematic parametric study, the influence of adjoining walls and number of tie-columns on the seismic behavior of confined masonry panels is numerically assessed and a simple but rational method for predicting the nonlinear behavior of these structures is proposed.

Download Full-text