Showing papers in "Soil Dynamics and Earthquake Engineering in 2021"

TL;DR: In this article, the failure process of gas-bearing coal at complex mining environment, the dynamics experiments were conducted through Split Hopkinson Pressure Bar of gasbearing coal (SHPB-GAS) experimental system, which showed that the filtered stress waveform presented to be sine-like.

TL;DR: Analyzing the nonlinear BIS-TMDI system subjected to the near-fault pulse-like ground motions, the superiority of the system in reducing the displacement of isolation layer, the responses of superstructure and the stroke performance of TMDI are further verified.

TL;DR: In this paper, the authors performed an extended numerical parametric study involving two-dimensional time history analyses of selected soil-tunnel configurations to evaluate the response of the selected tunnels under transverse seismic shaking.

TL;DR: In this paper, the historical development and practical implementation of structural base isolation systems that work on the principle of friction are discussed in the light of analytical, numerical, and experimental studies carried out by researchers.

TL;DR: The results showed promising performance of the proposed parameter, called Fault Density, calculated using Kernel Density Estimation and Bivariate Moran's I, for the earthquakes of high magnitudes, especially using SVM and DNN models.

TL;DR: In this article, an improved base isolation device is proposed to achieve seismic resilient design of structures during earthquakes, which is composed of conventional friction pendulum bearing (FPB) and viscous damper (VD) and named as FPB-VD.

TL;DR: In this article, an efficient framework is presented to evaluate the stability of the rock slope with weak layers considering spatial variability of rock mass strength properties under seismic loading, and the Latin Hypercube Sampling (LHS) is adopted to calculate the failure probability of rock slope.

TL;DR: In this paper, the effects of rubber size, rubber content, and shear strain amplitude on strength, volumetric strain, damping ratio, and modulus of a clay-rubber mixture (CRM) were investigated through strain-controlled monotonic and cyclic triaxial tests.

TL;DR: In this paper, a probabilistic approach is applied to evaluate the effects of soil structure interaction on the fragility assessment of two selected benchmark buildings: a Reinforced Concrete with Infill Masonry Walls (RCIMW) and a reinforced concrete (RC).

TL;DR: In this article, a low-cost fiber reinforced elastomeric isolators (FREIs) developed with recycled rubber (RR) were used to improve the response of typical URM buildings in developing countries.

TL;DR: The results collected were able to assess the effective response of CSS devices, when design geometrical characteristics are overcome within specific defined limits, and to formulate suitable numerical models to deal with extra-stroke response of DCSS in dynamic analysis.

TL;DR: In this paper, the energy release rate of the blast-induced crack was analyzed using the model experiment method, combined with the fractal damage theory and the energy-release rate theory.

TL;DR: In this article, the impact of ground motion duration on the seismic performance of a multi-layer earth slope is quantitatively investigated, using two pairs of ground-motion suites selected matching a scenario-based response spectrum and a design spectrum, respectively.

TL;DR: The results demonstrate that the PVC sand-wich isolation mechanism can be a promising alternative to more expensive damage mitigating solutions.

TL;DR: This paper compares three different seismic response analysis approaches, each characterised by a different refinement, and shows that non-linear time-history analysis of equivalent SDoF systems is not substantially superior with respect to a non- linear static analysis coupled with the capacity spectrum method.

TL;DR: In this paper, a probabilistic seismic hazard assessment (PSHA) study along the DSTF is presented, where an earthquake catalogue including the paleo-seismological studies, historical records and instrumental seismicity is compiled.

TL;DR: A novel soil liquefaction potential evaluation system using cone penetration test (CPT) and shear wave velocity test (Vs) measurements and a new probabilistic model is developed by considering the model uncertainty and sampling bias based on weighted maximum likelihood estimation.

TL;DR: In this article, a multi-Tuned Liquid Column Damper-Inerter (MTLCDI) is developed to control the seismic response of adjacent high-rise buildings.

TL;DR: In this paper, a fully coupled dynamic effective-stress finite element procedure is used to investigate the effects of the frequency content of input motion and the amplitude of both horizontal and vertical components of both input motion on the settlement of the pile group in saturated sand deposits, and a modified generalized plasticity model is employed to characterize the dynamic behavior of various density of sands.

TL;DR: In this article, an energy dissipation system consisting of floating roof and external dampers that are utilized to control liquid vibration by augmenting the level of damping was evaluated at design-level earthquakes, and compared with floating roofed steel cylindrical tanks equipped with supplemental devices and counterparts without them.

TL;DR: In this article, the viscous-spring artificial boundary (VSAB) is used at the bottom boundary of the SSI model to consider the radiation damping effect and to improve the calculation accuracy of the model.

TL;DR: In this paper, a support vector machine (SVM) is introduced to improve the computational efficiency of estimating structural response of high concrete faced rockfill dams in the intensity earthquake region in southwest China.

TL;DR: In this article, the influence of freeze-thaw weathering on dynamic tensile properties and damage mechanism of rock material, the porosity and T2 spectrum distribution of rock samples underwent different freeze-thyaw cycles were obtained by nuclear magnetic resonance (NMR), and the variation of micropores and macropore that caused by freezethaw cycles was calculated by T 2 spectrum, and the dynamic splitting tensile test was carried out on rock samples by using split Hopkins pressure bar (SHPB).

TL;DR: In this article, the effect of loading frequency on the sand liquefaction response was investigated by performing cyclic triaxial tests in both stress-controlled and strain-controlled modes.

TL;DR: This study assesses the performance of the Capacity Spectrum Method with real (i.e. recorded) ground motions to explicitly account for record-to-record variability in fragility analysis and proposes a cloud-based approach (Cloud-CSM) to derive fragility relationships.

TL;DR: In this paper, the authors investigated the seismic responses of a 5MW offshore wind turbine considering nonlinear pile-soil dynamic interaction, where the pile is assumed to be rest on the rigid bedrock and soil nonlinearity is accounted for approximately using an inhomogeneous boundary zone around the pile and a homogeneous zone outside the boundary zone.

TL;DR: In this paper, the authors investigated the benefit of steel buildings using the Self-centering Energy-absorbing Dual Rocking Core (SEDRC) system compared to that using other emerging smart lateral force-resisting system (e.g., shape memory alloy braced frame (SMABF)) and conventional one.

TL;DR: In this paper, the authors used 2-D finite element models that account for soil nonlinearity and structural plastic damage to derive the fragility curves of a subway station structure and derived the vulnerability curves utilizing the inter-story drift ratio as the damage measure and the peaks of ground acceleration as the intensity measure.

TL;DR: In this article, a multi-stage repeated load triaxial (RLT) testing procedure was proposed and utilized for evaluating the permanent deformation behavior of RCA/RG blends.

TL;DR: In this paper, the axial load transfer during seismic events for pile groups installed in loose and dense sand layers was investigated employing three-dimensional (3D) nonlinear finite element models (FEM).