Shaking Table Testing of Adobe Masonry Structures

Blondet, Marcial; Tarque, Nicola; Ginocchio, Francisco; Villa-García, Gladys

doi:10.1007/978-3-030-74737-4_6

Cited by 4 publications

(8 citation statements)

References 14 publications

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“…Dynamic procedures typically use a sequence of ground motions incrementally scaled until the collapse of the specimen is observed. 39 In this case, the intensity measures are record-dependent parameters such as PGA or pseudo-acceleration 𝑆 𝑎 (𝑇 1 ) at the specimen's fundamental period 𝑇 1 , as well as seismic demands at critical stages such as maximum roof displacement and maximum absolute acceleration in one or more locations of the walls. Considering that the quasistatic tests facilitate the assessment of the incremental degradation of the walls, these were used herein to create the database for in-plane (IP) demands.…”

Section: Experimental Database Compilationmentioning

confidence: 99%

Empirical fragility assessment of adobe and rammed earth walls subjected to seismic actions

Rincón

Reyes

Carrillo

et al. 2022

Earthq Engng Struct Dyn

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In many Latin American countries, most constructions from the colonial period were built in earth masonry. During past earthquakes, some of these buildings collapsed even with moderate magnitude events resulting in significant loss of human lives. Nevertheless, empirical fragility functions at the component level (FFs) for these structures have not been comprehensively investigated in the literature. This paper presents the probabilistic characterization of the uncertain damage sustained by earthen vertical wall segments subjected to seismic actions. Drift-based FFs are constructed for in-plane (IP) actions using 48 test results from previous studies. Three damage states, corresponding to cracking, extensive cracking, and collapse, are proposed for this loading direction. Only the collapse state is analyzed for out-of-plane (OOP) forces and a total of 26 experimental results comprise the database for this case; peak ground acceleration is selected to represent the intensity measure for OOP demands. Analysis of variance (ANOVA) tests aided to confirm that, for in-plane demands, the compressive strength is one of the most influential parameters for the cracking limit state. ANOVA tests also helped to identify that only the slenderness and boundary conditions seem to have a slight influence in the FFs for the OOP demands.Finally, the derived FFs were used to recommend drift and acceleration-based limit states for earthquake-resistant assessment of earthen components. The developed fragility functions may be used to predict the probability of occurrence of a certain damage state at a component level which can be used in risk and resilience assessments of vernacular buildings.

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Section: Experimental Database Compilationmentioning

confidence: 99%

Empirical fragility assessment of adobe and rammed earth walls subjected to seismic actions

Rincón

Reyes

Carrillo

et al. 2022

Earthq Engng Struct Dyn

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“…Seismic performance has been a particular concern for unreinforced RE constructions due to their deficient structural behavior during past earthquakes. Events such as the Peru 2007 and the Chile 2010 earthquakes highlighted the vulnerability of historic earthen buildings to seismic forces [6,7]. The deficiencies in their seismic behavior can be attributed to factors such as poor material properties, irregular distribution of walls and openings, weak connections between walls, inadequate wall-floor-roof connections, heavy roofs and floors, and deficient out-of-plane strength [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Various countries, including Peru [16], Australia [17], Germany [18], and more recently, Colombia [19], have established regulations and guidelines for seismic rehabilitation of earthen structures. The current rehabilitation techniques include bonded fibers, mesh reinforcement, tensors, polyester fabric strips, straps, steel cables, concrete beams, mortar with textiles, and confining elements (wood and steel plates) [6][7][8][9][12][13][14][15][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance of a 1:4 Scale Two-Story Rammed Earth Model Reinforced with Steel Plates Tested on a Bi-Axial Shaking Table

Barrera,

Ruiz,

Reyes

et al. 2023

Buildings

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During the 16th and 17th centuries, Latin American cities adopted earthen construction techniques from European colonizers. As a result, rammed earth (RE) buildings now occupy an important place in Latin America’s cultural heritage. However, earthquakes around the world have shown that unreinforced earthen constructions are highly vulnerable. For several years, researchers in northern South America have been proposing a technique that consists of installing confining steel plates (or wooden elements) on both sides of the RE walls to form a grid. This system has shown excellent performance in controlling seismic damage and increasing strength and ductility capacity. Although researchers have tested full-scale one- and two-story earthen walls under pseudo-static loading in the laboratory, and one- and two-story earthen walls at 1:1 and 1:2 scales on uniaxial and biaxial shaking tables, the behavior of a complete reinforced module (one- or two-story) on a shaking table has never been assessed. The present study presents the results of shaking table tests performed on two-story RE modules at 1:4 scale. The experimental data indicate that the retrofit system with confining steel plates was effective in reducing the seismic damage of earthen constructions. In addition, the comparison of the results of the 1:4 scale tests with the 1:2 and 1:1 scale tests previously conducted by the researchers shows that the acceleration levels of the equivalent prototypes are in the same order of magnitude for the three scales.

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“…Electro-hydraulic shaking table is one of the most important pieces of equipment for replicating actual vibration conditions in various applications, including biomedical and geological researches 1 – 3 , engineering seismic research works 4 – 6 , aerospace vibration tests 7 , 8 , and vehicle road simulations 9 , 10 , etc. In the context of shaking table test, the control-structure interaction (CSI) 11 – 13 is the dynamic coupling between shaking table and load (that is the test structure model) (Fig.…”

Section: Introductionmentioning

confidence: 99%

Effect assessment for the interaction between shaking table and eccentric load

Wang

Liu

et al. 2022

Sci Rep

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Electro-hydraulic shaking table is an essential experimental apparatus to evaluate structural performance under actual vibration condition. The control-structure interaction (CSI) between shaking table and eccentric load has lately received considerable attention for causing the accuracy degradation of shaking table test. At present, the research gap of the influence of the eccentricity of load on the CSI makes it challenging to find the CSI effects. And an effect assessment is yet to be proposed to evaluate the CSI effects, which has impeded the development of test technology. To overcome those theoretical bottlenecks, in this research, an analytical transfer function matrix of shaking table and eccentric load is established to analyze the CSI effects. The analysis is conducted under such conditions as different mass ratio (MR), moment of inertia ratio (IR), and eccentric distance ratio (ER) conditions. Through the analysis, the role of the ER is identified, the sensitivities of the MR, IR, and ER to the transfer function matrix are revealed, and the CSI effects are found. Furthermore, a novelty effect assessment is proposed to appraise whether the CSI effects can be ignored in shaking table test. And the visualization expression of the effect assessment is obtained for convenient application.

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Shaking Table Testing of Adobe Masonry Structures

Cited by 4 publications

References 14 publications

Empirical fragility assessment of adobe and rammed earth walls subjected to seismic actions

Empirical fragility assessment of adobe and rammed earth walls subjected to seismic actions

Seismic Performance of a 1:4 Scale Two-Story Rammed Earth Model Reinforced with Steel Plates Tested on a Bi-Axial Shaking Table

Effect assessment for the interaction between shaking table and eccentric load

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