Experimental study on in-plane cyclic response of partially grouted reinforced concrete masonry shear walls

Ramírez, Pablo; Sandoval, Cristián; Almazán, José L.

doi:10.1016/j.engstruct.2016.08.010

Cited by 64 publications

(27 citation statements)

References 11 publications

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“…Nonetheless, Figure 10 shows that CMW-2 and PWM-2 with an axial compression of σ n / f m ≈ 0.15 experienced slightly more distinct strength degradation from the peak point, which proved that axial compression had a detrimental effect on the ductile behavior of the specimens. In addition, the curves of both traditional and precast RMSWs showed obvious pinching behavior and the phenomenon concurs with the report of Ramírez [24]. Furthermore, abrupt step-like decline of lateral load was observed in the hysteretic curves of test walls due to steel rupture and seriously compressive toe crushing under high loading displacements.…”

Section: Hysteretic Curvesupporting

confidence: 89%

“…The experimental and theoretical load capacity versus the axial compression ratio of each specimen are presented in Figure 11. curves of both traditional and precast RMSWs showed obvious pinching behavior and the phenomenon concurs with the report of Ramírez [24]. Furthermore, abrupt step-like decline of lateral load was observed in the hysteretic curves of test walls due to steel rupture and seriously compressive toe crushing under high loading displacements.…”

Section: Lateral Load Capacitysupporting

confidence: 88%

“…Displacement ductility is a measurement of the ability of the shear wall to deform in the elasto-plastic stage without significant degradation of strength. The appropriate definition of the shear wall's ductility has been discussed in the literature [23][24][25][26]. In this study, ductility is defined as the ratio between the top displacement corresponding to 0.85 F p in the post-peak stage and the yield displacement of the specimen.…”

Section: Displacement Ductilitymentioning

confidence: 99%

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Experimental Investigation on the Seismic Behavior of Newly-Developed Precast Reinforced Concrete Block Masonry Shear Walls

Wang

2018

Applied Sciences

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Typically, a special type of concrete block with cleaning holes is used in the bottom layer of traditional reinforced masonry shear walls (RMSWs) for mortar cleaning and vertical rebar connection, which results in reduced integrity and weakened structural behavior. In this paper, a precast construction technology was introduced to overcome these shortcomings. The cleaning-hole blocks were eliminated in the newly-developed precast RMSWs. Quasi-static tests on two traditional and two precast fully grouted RMSWs were conducted. The results showed that the flexural capacity of precast walls exhibited about a 10% increase when compared to traditional RMSWs under the same axial compression. Precast RMSWs that failed in flexural mode showed favorable deformation capacity and the displacement ductility value corresponding to 15% strength degradation reached 4.9. The wall stiffness degraded rapidly to 50% of the initial stiffness, K 0 , at 0.2% drift and, at 0.5% drift, the corresponding stiffness decreased to about 21% K 0 at a more gradual rate. Furthermore, precast RMSWs exhibited significant energy dissipation capacity. The experiment suggests that precast RMSWs have a satisfactory seismic performance.

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Section: Hysteretic Curvesupporting

confidence: 89%

Section: Lateral Load Capacitysupporting

confidence: 88%

Section: Displacement Ductilitymentioning

confidence: 99%

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Experimental Investigation on the Seismic Behavior of Newly-Developed Precast Reinforced Concrete Block Masonry Shear Walls

Wang

2018

Applied Sciences

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“…e results showed that the low vertical stresses reduced the lateral capacity of walls, and the fabricated columns could improve the seismic performance of walls. Grouted reinforced masonry walls could also show good seismic performance [28][29][30]. Concrete blocks are also widely used in recent years, Liu et al [31] used recycled concrete hollow blocks to construct five masonry shear walls, and the seismic performance of specimens was carried out by cyclic loading tests.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Masonry Walls Built with New Type of Fired Shale Hollow Blocks

Zeng

Wang

2020

Advances in Civil Engineering

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This paper presents the cyclic loading test results of a new type of fired shale hollow block masonry walls. Six specimens were designed including two specimens without reinforcements (bare walls) and four specimens constrained by structural columns (reinforced walls). The influences of aspect ratio, vertical compressive stress, and structural column on the seismic performance of the specimens were investigated. The failure mode, bearing capacity, ductility, stiffness degradation, and energy dissipation of specimens were analyzed. The results showed that the crack patterns of specimens changed from the horizontal straight shape (bare walls) to “X” shape (reinforced walls), and the corresponding bearing capacity, ductility, stiffness degradation, and energy dissipation of the specimens were improved. With the increase of the vertical compressive stress, the ductility and the secant stiffness of the specimens increased. Moreover, with the decrease of aspect ratio, the bearing capacity and secant stiffness of the masonry walls increased, while the energy dissipation capacity decreased. This paper confirms that fired shale hollow block walls could meet the seismic requirements through appropriate design, which could promote the application of this new type of block in civil engineering.

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“…This new stiffened masonry wall structure has excellent seismic resisting capacity and low construction cost (Zhao and Astaneh-Asl 2004). But the inflexible space arrangement restricts its application in practical engineering equally (Ramirez et al 2016). However, this new stiffened masonry wall is an alternative to enhance the overall seismic resistance of RC moment frames and none of those references focused on the experimental behavior of hybrid RC frame structures with stiffened masonry wall.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation on Seismic Performance of a Hybrid RC Frame System with Stiffened Masonry Wall

Yue

2018

ACT

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This paper presents an experimental and numerical study on a new hybrid structural system with RC frame and stiffened masonry wall. Summarily, four different connection types between frames and reinforced masonry walls were divided in this investigation. Firstly, construction for different connecting modes were described in detail and then tests of four specimens under reciprocating load were carried out to study the influence of connection modes on failure modes and hysteretic response. Results reveal that all these specimens have higher ductility and lower stiffness degradation than RC frame structure and frame-shear wall structure. Furthermore, the specimen of type Ⅳ shows lower ductility and higher ultimate bearing capacity and energy dissipation than the other three because of the more effective connection mode to avoid weak load-bearing point and unsatisfied failure mode. Finally, FE models were established to simulate the seismic behavior of testing specimens. Numerical results can accurately predict the failure modes and cyclic response except for failing to fully replicate the pinching response due to ignorance of bond slip effect. Study results will provide solid support and reference for the further nonlinear seismic response analysis and for the application in practical engineering for this new proposed hybrid structural system.

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Experimental study on in-plane cyclic response of partially grouted reinforced concrete masonry shear walls

Cited by 64 publications

References 11 publications

Experimental Investigation on the Seismic Behavior of Newly-Developed Precast Reinforced Concrete Block Masonry Shear Walls

Experimental Investigation on the Seismic Behavior of Newly-Developed Precast Reinforced Concrete Block Masonry Shear Walls

Seismic Performance of Masonry Walls Built with New Type of Fired Shale Hollow Blocks

Experimental and Numerical Investigation on Seismic Performance of a Hybrid RC Frame System with Stiffened Masonry Wall

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