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Acta Mechanica Solida Sinica 2023年第3期36卷 457-468页

作者： Zailin Yang Jinlai Bian Huanan Xu Yong Yang College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China School of Resource Engineering Longyan UniversityLongyan 364012China Key Laboratory of Advanced Material of Ship and Mechanics Ministry of Industry and Information TechnologyHarbin Engineering UniversityHarbin 150001China

The task of thiswork is to study the scattering of SHwaves by homogeneous tunnel structures in an unbounded inhomogeneous *** shear modulus is assumed to be a function of coordinates(x,y).Atwo-dimensional scattering model is *** different inhomogeneous parameters,the medium has different properties,expressed as a rigid *** stress concentration phenomenon of the structure is analyzed for material *** on the complex function theory,the expressions of wave field in the tunnel are *** stress concentration phenomenon on the tunnel is discussed with numerical *** distribution of dynamic stress concentration factor on the inner and outer boundaries is analyzed under different influencing ***,it is found that the distribution of dynamic stress concentration factor is significantly affected by the inhomogeneous parameters and reference wave numbers of the medium.

关键词： Inhomogeneous media Shear modulus Complex function theory SH wave Dynamic stress concentration factor(DSCF)

Seismic Vulnerability Analysis of Single-Story Reinforced Concrete Industrial Buildings with Seismic Fortification

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Structural Durability & Health Monitoring 2019年第2期13卷 123-142页

作者： Jieping Liu Lingxin Zhang Haohao Zhang Tao Liu Key Laboratory of earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationNangang DistrictHarbin150080China School of Civil Engineering Southeast UniversityXuanwu DistrictNanjing211189China

As there is a lack of earthquake damage data for factory buildings with seismic fortifications in china,seismic vulnerability analysis was performed by numerical simulation in this *** earthquake-structure analysis model was developed with considering the influence of uncertainties of the ground motion and structural model *** small-size sampling was conducted based on the Latin hypercube sampling and orthogonal design *** nonlinear analysis,the seismic vulnerability curves and damage probability matrix with various seismic fortification intensities(SFI)were *** seismic capacity of the factory building was then *** results showed that,with different designs at different SFIs,the factory building could consistently achieve the three seismic fortification *** the studied factory buildings with the SFI of 6,they satisfied the seismic fortification requirements of“no damage in moderate earthquakes,mendable in strong earthquakes”;for those buildings with SFIs of 7 and 8,the requirement of“no collapsing in super strong earthquakes”was generally met;while for those with SFIs of 9,the requirement of“mendable in moderate earthquakes”was almost *** results showed factory buildings designed with low SFIs are better at achieving the seismic fortification objectives than those designed with high SFIs.

关键词： Seismic vulnerability analysis uncertainty latin hypercube sampling orthogonal design nonlinear time history analysis factory buildings

Theory and application of equivalent transformation relationships between plane wave and spherical wave

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earthquake Engineering and Engineering Vibration 2017年第4期16卷 773-782页

作者： Wang Yao Yang Zailin Zhang Jianwei Yang Yong College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China

Based on the governing equations and the equivalent models, we propose an equivalent transformation relationships between a plane wave in a one-dimensional medium and a spherical wave in globular geometry with radially inhomogeneous properties. These equivalent relationships can help us to obtain the analytical solutions of the elastodynamic issues in an inhomogeneous medium. The physical essence of the presented equivalent transformations is the equivalent relationships between the geometry and the material properties. It indicates that the spherical wave problem in globular geometry can be transformed into the plane wave problem in the bar with variable property fields, and its inverse transformation is valid as well. Four different examples of wave motion problems in the inhomogeneous media are solved based on the presented equivalent relationships. We obtain two basic analytical solution forms in Examples I and II, investigate the reflection behavior of inhomogeneous half-space in Example III, and exhibit a special inhomogeneity in Example IV, which can keep the traveling spherical wave in constant amplitude. This study implies that our idea makes solving the associated problem easier.

关键词： elastodynamic issue equivalent transformation relationship governing equation inhomogeneous medium

Study on vulnerability matrices of masonry buildings of mainland of china

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earthquake Engineering and Engineering Vibration 2018年第2期17卷 251-259页

作者： Sun Baitao Zhang Guixin Institute of Engineering Mechanics China Earthquake AdministrationHarbin 150080China Key Laboratory of earthquake Engineering and Engineering Vibration of china earthquake administration Harbin 150080China

The degree and distribution of damage to buildings subjected to earthquakes is a concern of the Chinese Government and the *** damage data indicates that seismic capacities of different types of building structures in various regions throughout mainland of china are ***,the seismic capacities of the same type of structure in different regions may *** contributions of this research are summarized as follows：1）Vulnerability matrices and earthquake damage matrices of masonry structures in mainland of china were chosen as research *** aim was to analyze the differences in seismic capacities of sample matrices and to present general rules for categorizing seismic resistance.2）Curves relating the percentage of damaged masonry structures with different seismic resistances subjected to seismic demand in different regions of seismic intensity（VI to X）have been developed.3）A method has been proposed to build vulnerability matrices of masonry *** damage ratio for masonry structures under high-intensity events such as the Ms 6.1 Panzhihua earthquake in Sichuan province on 30 August2008,was calculated to verify the applicability of this *** research offers a significant theoretical basis for predicting seismic damage and direct loss assessment of groups of buildings,as well as for earthquake disaster insurance.

关键词： seismic capacity seismic intensity seismic resistances seismic damage matrix

Notch fatigue of Cu50Zr50 metallic glasses under cyclic loading:molecular dynamics simulations

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Communications in Theoretical Physics 2021年第6期73卷 119-125页

作者： Yong Yang Hairui Li Zailin Yang Jin Liu Evans Kabutey Kateye Jianwei Zhao College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Material of Ship and Mechanics Ministry of Industry and Information TechnologyHarbin Engineering UniversityHarbin 150001China College of Materials and Textile Engineering Jiaxing UniversityJiaxing 314000China

Molecular dynamics simulation is performed to simulate the tension–compression fatigue of notched metallic glasses(MGs),and the notch effect of MGs is *** notches will accelerate the accumulation of shear transition zones,leading to faster shear banding around the notches’root causing it to undergo severe plastic ***,a qualitative investigation of the notched MGs demonstrates that fatigue life gradually becomes shorter with the increase in sharpness until it reaches a critical *** fatigue performance of blunt notches is stronger than that of sharp *** the notches blunter can improve the fatigue life of MGs.

关键词： metallic glasses notches fatigue life molecular dynamics simulations

Scattering of SH waves by a scalene triangular hill with a shallow cavity in half-space

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earthquake Engineering and Engineering Vibration 2022年第4期21卷 877-897页

作者： Sun Yingchao Yang Zailin Yang Yong Wang Guangyi College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China AVIC-HONGDU Nanchang 330024China Key Laboratory of Advanced Material of Ship and Mechanics Ministry of Industry and Information TechnologyHarbin Engineering UniversityHarbin 150001China Engineering research Institute of Appraisal and Strengthening Shandong Jianzhu UniversityJinan 250101China Jiangxi Technology Innovation Center of Advanced Aviation Structure and System Integration Nanchang 330024China

In this study,a theoretical approach is used to investigate the scattering problem of circular holes under a scalene triangle on the *** wave displacement function is obtained by solving the Helmholtz equation that meets the zero-stress boundary conditions by adopting the method of separation of *** on the complex function,multi-polar coordinate method,and region-matching technique,algebraic equations are established at auxiliary boundaries and free boundaries conditions in a complex *** auxiliary circle is used to solve the singularity of the reflex angle at the triangle ***,according to sample statistics,the least squares method is used instead of the Fourier expansion method to solve the undetermined coefficient of the algebraic equations by discrete *** results show that the continuity of the auxiliary boundaries and the accuracy of the zero-stress boundaries are adequate,and the displacement of the free surface and the stress of the circular hole are related to the shape of the triangle,the position of the circular hole,the direction of the incident wave,and the frequency content of the ***,time-domain responses are calculated by FFT based on the frequency domain theory,and the results reveal the wave propagation mechanism in a complicated structure.

关键词： earthquake ground motions theoretical seismology wave scattering and diffraction wave propagation

A benchmark city for seismic resilience assessment

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earthquake Engineering and Engineering Vibration 2020年第4期19卷 811-826页

作者： Shang Qingxue Guo Xiaodong Li Quanwang Xu Zhen Xie Linlin Liu Chaofeng Li Jichao Wang Tao Key Laboratory of earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China earthquake Resistance and Disaster Mitigation Institute Beijing University of TechnologyBeijing 100022China Department of Civil Engineering Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Urban Underground Space Engineering School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijing 100083China School of Civil and Transportation Engineering Beijing University of Civil Engineering and ArchitectureBeijing 100044China School of Civil Engineering and Transportation Hebei University of TechnologyTianjin 300401China

The concept of seismic resilience has received significant attention from academia and industry during the last two decades. Different frameworks have been proposed for seismic resilience assessment of engineering systems at different scales(e.g., buildings, bridges, communities, and cities). Testbeds including Centerville virtual community(CVC), Memphis testbed(MTB), and the virtual city of Turin, Italy(VC-TI) have been developed during the last decade. However, the resilience assessment results of Chinese cities still require calibration based on a unified evaluation model. Therefore, a geographic information system(GIS)-based benchmark model of a medium-sized city located in the southeastern coastal region of china was developed. The benchmark city can be used to compare existing assessment frameworks and calibrate the assessment results. The demographics, site conditions, and potential hazard exposure of the benchmark city, as well as land use and building inventory are described in this paper. Data of lifeline systems are provided, including power, transportation, water, drainage, and natural gas distribution networks, as well as the locations of hospitals, emergency shelters, and schools. Data from past earthquakes and the literature were obtained to develop seismic fragility models, consequence models, and recovery models, which can be used as basic data or calibration data in the resilience assessment process. To demonstrate the completeness of the data included in the benchmark city, a case study on the accessibility of emergency rescue after earthquakes was conducted, and the preliminary results were discussed. The ultimate goal of this benchmark city is to provide a platform for calibrating resilience assessment results and to facilitate the development of resilient cities in china.

关键词： seismic resilience resilience assessment benchmark model lifeline systems fragility models

Electrical conductivities of two granite samples in southern Tibet and their geophysical implications

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Science china Earth Sciences 2017年第8期60卷 1522-1532页

作者： GUO YingXing WANG DuoJun ZHOU YongSheng LIU ZaiYang YU YingJie LI DanYang ZHANG DongNing ZHU AiYu Institute of Geophysics China Earthquake Administration College of Earth Sciences University of Chinese Academy of Sciences The State Key Laboratory of earthquake Dynamics Institute of GeologyChina Earthquake Administration

There are clear differences in the electrical conductivities of the crustal granites of the Qinghai-Tibet *** these granites are among the major rock types on the Qinghai-Tibet Plateau, it is very important to detect the electrical conductivity of granites under high temperatures and pressures to study the electrical conductivity structure of this area. Using impedance spectroscopy at a frequency range of 10.1–106 Hz, the electrical conductivity of the muscovite-granite collected from Yadong was investigated at a confining pressure of 1.0 GPa and temperatures ranging from 577 to 996 K, while the electrical conductivity of the biotite-granite collected from Lhasa was investigated at a pressure of 1.0 GPa and temperatures ranging from587 to 1382 K. The calculated activation enthalpies of the Yadong muscovite-granite sample is 0.92 eV in the low-temperature range(577–919 K) and 2.16 eV in the high-temperature range(919–996 K). The activation enthalpies of the Lhasa biotite-granite sample is 0.48 eV in the low-temperature range(587–990 K) and 2.06 eV in the high-temperature range(990–1382 K). The change in the activation enthalpies of the granites at different temperature ranges may be associated with the dehydration of the two samples. The electrical conductivities of the granite samples obtained in the laboratory using impedance spectroscopy correspond well with field observations conducted near the sampling points, both in terms of the actual conductivity values and the observed variations between the low-temperature and high-temperature regimes. This correlation of laboratory and field conductivities indicates that the conductivities of the crustal rocks in the two regions closely correspond to granite *** calculated the electrical conductivities of muscovite-granite and biotite-granite samples using the effective medium and HS boundary models. When applied to the crustal rocks of southern Tibet, the results of the geophysical conductivity

关键词： Electrical conductivity High temperature and pressure Granite Southern Tibet Plateau

Lessons from the seismic behavior of a steel grid roof structure heavily damaged in Lushan earthquake

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earthquake Engineering and Engineering Vibration 2019年第1期18卷 95-111页

作者： Li Jichao Qu Zhe Wang Tao Key Laboratory of earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake Administration

The seismic behavior of a school gymnasium, whose steel grid roof was heavily damaged during the Mw6.6 Lushan earthquake in 2013, is simulated through nonlinear dynamic analysis. The simulated damage is compared with field observations to validate the numerical model, based on which a parametric study was performed to provide insight into the failure process and damage patterns of steel grids. The results suggest that the grid damage is strongly related to roofsubstructure interactions. These include not only the substructure's amplification of the vibration, but the uncoordinated displacement of the substructure's columns which support the grid also play an equally important role. In particular, the latter effect may significantly alter the internal force distribution in the steel grid and lead to unexpected buckling of members that are proportioned as tension-only members. While such interactions are generally not accounted for in the design practice for grid structures in china, similar seismic damage may be expected for other existing grid roofs in future earthquakes. As is also demonstrated in this study, seismic isolation of the roof is a promising solution to protect grid roof structures by mitigating the detrimental effects of roof-substructure interactions.

关键词： Lushan earthquake steel space structure roof-substructure interaction nonlinear dynamic analysis seismic isolation vertical ground motion

Study on the effect of ground motion direction on the response of engineering structure

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earthquake Engineering and Engineering Vibration 2016年第4期15卷 649-656页

作者： Sun Menghan Fan Feng Sun Baitao Zhi Xudong Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology School of Civil Engineering Harbin Institute of Technology Key Laboratory of earthquake Engineering and Engineering Vibration Institute of Engineering Mechanics China Earthquake Administration

Due to the randomness of earthquake wave magnitude and direction, and the uncertain direction of strong axis and weak axis in the construction of engineering structures, the effect of the direction of ground motion on a structure are studied herein. Ground motion records usually contain three vertical ground motion data, which are obtained by sensors arranged in accordance with the EW （East -West） direction, NS （South- North） direction and perpendicular to the surface （z） direction, referring to the construction standard of seismic stations. The seismic records in the EW and NS directions are converted to Cartesian coordinates in accordance with the rotation of θ = 0°-180°, and consequently, a countless group of new ground motion time histories are obtained. Then, the characteristics of the ground motion time history and response spectrum of each group were studied, resulting in the following observations：（1） the peak and phase of ground motion are changed with the rotation of direction θ, so that the direction θ of the maximum peak ground motion can be determined; （2） response spectrum values of each group of ground motions change along with the direction θ, and their peak, predominant period and declining curve are also different as the changes occur; then, the angle θ in the direction of the maximum peak value or the widest predominant period can be determined; and （3） the seismic response of structures with different directions of ground motion inputs has been analyzed under the same earthquake record, and the results show the difference. For some ground motion records, such as the Taft seismic wave, these differences are significant. Next, the Lushan middle school gymnasium structure was analyzed and the calculation was checked using the proposed method, where the internal force of the upper space truss varied from 25% to 28%. The research results presented herein can be used for reference in choosing the ground motion when checking the actual damage to struct

关键词： direction of grotmd motion structure effect coordinate transformation response spectrum