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Item type:Publication, Research developments and needs on seismic performance and strengthening of adobe masonry constructions(Springer Nature, 2021-01-01)The significant amount of studies on adobe masonry constructions, which have received growing interest from researchers and practitioners, allows preliminary conclusions on the state-of-the-art to be drawn. Besides, several research needs can be delineated to create the basis for knowledge development and implementation of seismic risk mitigation programmes. Past studies moved from material characterization to structural performance assessment through numerical simulation and experimental testing, as well as seismic strengthening. Future lines of research could focus on test standardisation, non-destructive and minor-destructive testing, full-scale testing to support structural modelling and strengthening, and numerical simulation through discrete element and equivalent frame methods. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Calibration of a total strain crack model for adobe masonry based on compression and diagonal compression tests(Elsevier Ltd, 2022-10-17)Although it has good compressive behavior, adobe masonry is classified as a quasi-brittle material mainly due to its relative low tensile strength and softening behavior after the peak tensile strength. The behavior, plus the high variability in the adobe mechanical properties, makes it difficult to evaluate the performance of entire adobe buildings. For such a purpose, the development of reliable and computationally efficient numerical approaches is required. This work shows a numerical methodology to calibrate the main mechanical parameters to be used in the numerical modeling of adobe samples following the finite element method (FEM) by using the Total-Strain Crack model. The present paper shows that this numerical model is able to represent the nonlinear behavior of the adobe masonry. The calibration process is based on preliminary experimental tests performed on masonry prisms (piles and wallets) subjected to axial compressive and diagonal compression loads, respectively. The main results show that it is possible to model adobe masonry in practice. A consistent reproduction of the cracking pattern from experimental tests is obtained. By using the calibrated properties, this work may be extended to evaluate the seismic vulnerability of complete adobe structures. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, KdV-like soliton gas: similarity and difference in integrable and non-integrable models(Elsevier BV, 2025-11-01)A comparison of the statistical characteristics of a rarefied soliton gas is carried out within the framework of integrable and non-integrable equations from the Korteweg-de Vries (KdV) hierarchy. As examples, multi-soliton solutions of the modified KdV equation, and the modular Schamel equation are considered. A common property of the dynamics of bipolar solitons is the formation of rogue waves, which do not occur in unipolar gases. The fourth moment of the wave field (kurtosis) increases compared to the initial value in the case of a bipolar gas, and decreases for a unipolar gas. In the case of integrable KdV equations, the characteristics of the soliton gas reach a stationary level, while in non-integrable equations they remain functions of time. The inelastic transfer of energy from small solitons to large ones occur, and large waves become “more extreme” against the background of small solitons. The tendency of the occurrence of an anomalously large wave (soliton - champion) in non-integrable systems are discussed.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Dynamics of Irregular Wave Fields in the Schamel Equation Framework(Pleiades Publishing, 2025-02-01)The present paper is devoted to the study of the dynamics of narrowband wave fields within the nonintegrable Schamel equation, which plays an important role in plasma physics, wave dynamics in metamaterials, and electrical circuits. A Monte Carlo approach is used to obtain a large number of random independent realizations of the wave fields, allowing for an investigation of the evolution of the following statistical characteristics: spectra, moments, and distribution functions. The simulations are conducted for different values of the Ursell number (the ratio of nonlinearity to dispersion) to study the impact of nonlinearity and dispersion on the processes under consideration. The features of freak waves appeared in the random wave fields are discussed.1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Seismic Performance Assessment of RC Wall Buildings with Low Boundary Confinement using a Nonlinear Beam-Based Model(Elsevier, 2026-07-12)The performance and safety of modern reinforced concrete (RC) wall buildings with limited boundary confinement remains uncertain in countries with evolving design practices and moderate-to-high seismicity. This paper presents a numerical assessment of their seismic response through nonlinear analyses conducted on 20 code-conforming prototype buildings, developed after examining typical design and detailing characteristics of RC wall buildings constructed in Peru between 2010 and 2023. The analyses employed an efficient beam-based modelling approach for walls that accounts for axial–shear–flexure interaction, previously validated with experimental data. The nonlinear static analyses show ultimate roof drift ratios with an average of 1.35% (ranging from 0.85% to 2.53%) and overstrength ratios with an average of 2.43 (ranging from 1.78 to 3.54), indicating moderate deformation capacity with significant variability across building heights, with failure primarily governed by concrete crushing at wall boundaries under flexural deformations. Their limited displacement capacity is attributed to high axial load ratios, slender wall geometries, low aspect ratios, reduced confinement zones, and low transverse reinforcement ratios. For the design basis earthquake (DBE), displacements obtained from nonlinear dynamic analyses exceeded code expectations by an average factor of 1.6, with displacement demand/capacity ratios ranging from 0.25 to 0.83. Under the maximum considered earthquake (MCE), an average displacement demand/capacity ratio of 0.90 was reached, and multiple buildings experienced global failure. These results suggest that code-based designs may underestimate seismic demands, leading to insufficient seismic joints, greater damage to structural and non-structural elements, and increased collapse risk. The findings provide insight into the vulnerability of RC wall buildings with low boundary confinement in Peru and across other Latin American countries with similar design practices and seismic hazard.