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shaking table test on a tunnel-group metro station in rock site under harmonic excitation

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Frontiers of Structural and Civil Engineering 2024年第9期18卷 1362-1377页

作者： Ruozhou LI Weiguo HE Xupeng YAO Qingfei LI Dingli ZHANG Yong YUAN Department of Geotechnical Engineering Tongji UniversityShanghai 200092China China Railway Liuyuan Group Co. Ltd.Tianjin 300308China Key Laboratory of Urban Underground Engineering of Ministry of Education Beijing Jiaotong UniversityBeijing 100044China

A tunnel-group metro station built in rock site is composed of a group of *** tunnels and their interconnections can show inconsistent responses during an *** study investigates the dynamic responses of such a metro station in a rock site,by shaking table *** lining structures of each tunnel and surrounding rock are modeled based on the similitude law;foam concrete and gypsum are used to model the ground-structure system,keeping relative stiffness consistent with that of the prototype.A series of harmonic waves are employed as excitations,input along the transverse and longitudinal direction of the shaking *** discrepant responses caused by the structural irregularities are revealed by measurement of acceleration and strain of the *** characteristics are identified by the transfer function method in white noise *** test results show that the acceleration response and strain response of the structure are controlled by the *** particular,the acceleration amplification effect at the opening section of the station hall is more significant than that at the standard section under transverse excitation;the amplification effect of the structural opening is insignificant under longitudinal excitation.

关键词： metro station tunnel-group shaking table test harmonic excitation dynamic response

shaking table test and numerical analysis of a 1:12 scale model of a special concentrically braced steel frame with pinned connections

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Earthquake Engineering and Engineering Vibration 2010年第1期9卷 51-63页

作者： Yu Haifeng Zhang Wenyuan Zhang Yaochun Sun Yusong School of Civil Engineering Harbin Institute of Technology Harbin 150090 China Northeast Electric Power Design Institute Changchun 130021 China

This paper describes shaking table tests of a 1：12 scale model of a special concentrically braced steel frame with pinned connections, which was fabricated according to a one-bay braced frame selected from a typical main factory building of a large thermal power plant. In order to investigate the seismic performance of this type of structure, several ground motion accelerations with different levels for seismic intensity Ⅷ, based on the Chinese Code for Seismic Design of Buildings, were selected to excite the model. The results show that the design methods of the members and the connections are adequate and that the structural system will perform well in regions of high seismicity. In addition to the tests, numerical simulations were also conducted and the results showed good agreement with the test results. Thus, the numerical model is shown to be accurate and the beam element can be used to model this structural system.

关键词： concentrically braced steel frame pinned connections shaking table test numerical analysis seismic performance

shaking table test and numerical analysis of offshore wind turbine tower systems controlled by TLCD

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Earthquake Engineering and Engineering Vibration 2015年第1期14卷 55-75页

作者： Chen Jianbing Liu Youkun Bai Xueyuan State Key Laboratory of Disaster Reduction in Civil Engineering & School of Civil Engineering Tongji University Shanghai Electric Power Design Institute Co. Ltd Jiang Architects & Engineers

A wind turbine system equipped with a tuned liquid column damper （TLCD） is comprehensively studied via shaking table tests using a 1/13-scaled model. The effects of wind and wave actions are considered by inputting response- equivalent accelerations on the shaking table. The test results show that the control effect of the TLCD system is significant in reducing the responses under both wind-wave equivalent loads and ground motions, but obviously varies for different inputs, Further, a blade-hub-tower integrated numerical model for the wind turbine system is established. The model is capable of considering the rotational effect of blades by combining Kane＇s equation with the finite element method. The responses of the wind tower equipped with TLCD devices are numerically obtained and compared to the test results, showing that under both controlled and uncontrolled conditions with and without blades＇ rotation, the corresponding responses exhibit good agreement. This demonstrates that the proposed numerical model performs well in capturing the wind-wave coupled response of the offshore wind turbine systems under control. Both numerical and experimental results show that the TLCD system can significantly reduce the structural response and thus improve the safety and serviceability of the offshore wind turbine tower systems. Additional issues that require further study are discussed.

关键词： offshore wind turbine shaking table test TLCD numerical model vibration control

shaking table test for reinforcement of soil slope with multiple sliding surfaces by reinforced double-row anti-slide piles

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Journal of Mountain Science 2022年第5期19卷 1419-1436页

作者： WU Hong-gang PAI Li-fang Northwest Research Institute Co. Ltd of China Railway Engineering CorporationLanzhou 730000China China Academy of Railway Sciences Beijing 100081China

Despite the continuous advancements of engineering construction in high-intensity areas,many engineering landslides are still manufactured with huge thrust force,and double-row piles are effective to control such large *** this study,large shaking table test were performed to test and obtain multi-attribute seismic data such as feature image,acceleration,and dynamic soil *** the feature image processing analysis,the deformation characteristics for the slope reinforced by double-row piles were *** analyzing the acceleration and the dynamic soil pressure time domain,the spatial dynamic response characteristics were *** Fast Fourier Transform and half-power bandwidth,the damping ratio of acceleration and dynamic soil pressure was *** that,the Seism Signal was used to calculate the spectral displacement of the accelerations to obtain the regional differences of spectral *** results showed that the overall deformation mechanism of the slope originates from tension failure in the soil *** platform at the back of the slope was caused by seismic subsidence,and the peak acceleration ratio was positively correlated with the relative pile *** dynamic soil pressure of the front row piles showed an inverted"K"-shaped distribution,but that of the back row piles showed an"S"-shaped *** predominant frequency of acceleration was 2.16 Hz,and the main frequency band was 0.7-6.87 Hz;for dynamic soil pressure,the two parameters became 1.15 Hz and 0.5-6.59 Hz,*** conclusion,dynamic soil pressure was more sensitive to dampening effects than ***,compared to acceleration,dynamic soil pressure exhibited larger loss factors and lower resonance ***,back row pile heads were highly sensitive to spectral displacement compared to front row pile *** findings may be of reference value for future seismic designs of double-row piles.

关键词： Double row anti-slide piles multislide surface landslide shaking table test Acceleration Dynamic soil pressure Dynamic response characteristic

shaking table test of seismic responses of anchor cable and lattice beam reinforced slope

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Journal of Mountain Science 2020年第5期17卷 1251-1268页

作者： ZHANG Jian-jing NIU Jia-yong FU Xiao CAO Li-cong XIE Qiang School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Chengdu City Construction Investment&Management Group Co.Ltd. Chengdu 610036China

As a combined supporting structure,the anchor cable and lattice beam have a complex interaction with the slope *** order to investigate the seismic behaviors of the slope reinforced by anchor cable and lattice beam,a largescale shaking table test was carried out on a slope model(geometric scale of 1:20)by applying recorded and artificial seismic waves with different *** acceleration and displacement of the slope,the displacement of lattice beam and the axial force of anchor cable were obtained to study the interaction between the slope and the supporting *** test results show that:(1)the acceleration responses of the slope at different relative elevations display obvious nonlinear characteristics with increasing of the peak ground acceleration(PGA)of the inputted seismic waves,and the weak intercalated layer has a stronger effect on acceleration amplification at the upper part of the slope than that at the lower part of the slope;(2)the frequency component near the second dominant frequency is significantly magnified by the interaction between the slope and the supporting structure;(3)the anchor cables at the upper part of the slope have larger peak and residual axial forces than that at the lower part of the slope,and the prestress loss of the anchor cable first occurs at the top of the slope and then passes down;(4)the peak and residual displacements inside the slope and on the lattice beam increase with the increase of relative *** the inputted PGA is not greater than 0.5 g,the combined effect of anchor cable and lattice beam is remarkable for stabilizing the middle and lower parts of the potential sliding *** research results can provide a reference for the seismic design of such slope and the optimization of supporting structure.

关键词： Earthquake engineering shaking table test Anchor cable Lattice beam Dynamic response

shaking table test and dynamic response prediction on an earthquake-damaged RC building

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Earthquake Engineering and Engineering Vibration 2004年第2期3卷 205-214页

作者：叶献国钱稼茹李康宁 Hefei University of Technology Hefei 230009China Professor Tsinghua University Beijing 100084China Professor CANNY Consultants Pte.Ltd. 261 Waterloo StreetSingapore 180261 Doctor

This paper presents the results from shaking table tests of a one-tenth-scale reinforced concrete (RC) building *** test model is a protype of a building that was seriously damaged during the 1985 Mexico *** input ground excitation used during the test was from the records obtained near the site of the prototype building during the 1985 and 1995 Mexico *** tests showed that the damage pattern of the test model agreed well with that of the prototype *** prediction of earthquake response has been conducted for the prototype building using a sophisticated 3-D frame *** input motion used for the dynamic analysis was the shaking table test measurements with similarity *** comparison of the analytical results and the shaking table test results indicates that the response of the RC building to minor and the moderate earthquakes can be predicated ***,there is difference between the predication and the actual response to the major earthquake.

关键词： RC building shaking table test seismic response inelastic dynamic analysis

shaking table test and numerical simulation on the effect of reinforcement on the seismic safety of dam slopes

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Journal of Harbin Institute of Technology(New Series) 2011年第4期18卷 132-138页

作者：朱亚林孔宪京邹德高李永胜 School of Civil and Hydraulic Engineering Dalian University of Technology School of Civil and Hydraulic Engineering Hefei University of Technology

The seismic safety of the reinforcement dam slope is studied through shaking table test and numerical *** dynamic characteristics of dam slopes,failure mechanism,seismic stability,as well as the effect of reinforcement during earthquakes are *** elasto-plastic analysis method (FLAC) is used to simulate the dynamic failure process of the reinforcement dam *** change law of permanent displacement of dam slope is *** effect of the length and the space of reinforcement on the depth of slip surface and the slope stability are *** agreement is obtained between the numerical results and those from shaking table *** results show that the dynamic failure is a gradual process not at a particular *** the increase of the reinforcement length or the decreasing reinforcement spacing,the slip surface becomes deeper and thus the slope stability is *** reinforcement can obviously enhance the overall stability of slope *** can also effectively control the shallow sliding of *** researches provide basic data for reinforcement measures design of earth-rockfill dam.

关键词： dam slope shaking table test reinforcement numerical simulation slip surface

shaking table test and cumulative deformation evaluation analysis of a tunnel across the hauling sliding surface

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Deep Underground Science and Engineering 2023年第4期2卷 371-393页

作者： Lifang Pai Honggang Wu Xu Wang Department of Civil Engineering Lanzhou Jiaotong UniversityLanzhouChina Geological Disaster Prevention and Control Science and Technology Innovation Center Department Northwest Research Institute Co.Ltd of C.R.E.C.LanzhouChina

To explore the cumulative deformation effect of the dynamic response of a tunnel crossing the hauling sliding surface under earthquakes,the shaking table test was conducted in this *** with the numerical calculations,this study proposed magniﬁcation of the Arias intensity(MIa)to characterize the overall local deformation damage of the tunnel lining in terms of the deformation characteristics,frequency domain,and *** the time‐domain analysis method,the plastic effect coefﬁcient(PEC)was proposed to characterize the degree of plastic deformation,and the applicability of the seismic cumulative failure effect(SCFE)was *** results show that the low‐frequency component(f1 and f2≤10 Hz)and the high‐frequency component(f3 and f4>10 Hz)acceleration mainly cause global and local deformation of the tunnel *** local deformation caused by the high‐frequency wave has an important effect on the seismic damage of the *** physical meaning of PEC is more clearly deﬁned than that of the residual strain,and the SCFE of the tunnel lining can also be deﬁ*** SCFE of the tunnel lining includes the elastic deformation effect stage(<0.15g),the elastic–plastic deformation effect stage(0.15g–0.30g),and the plastic deformation effect stage(0.30g–0.40g).This study can provide valuable theoretical and technical support for the construction of trafﬁc tunnels in high‐intensity earthquake areas.

关键词： magnification of Arias intensity plastic effect coefficient seismic action seismic cumulative failure effect shaking table test tunnel engineering

Seismic performance evaluation of water supply pipes installed in a full-scale RC frame structure based on a shaking table test

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 163-178页

作者： Wu Houli Guo Endong Wang Jingyi Dai Xin Dai Chenxi Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China

As an important part of nonstructural components,the seismic response of indoor water supply pipes deserves much *** paper presents shaking table test research on water supply pipes installed in a full-scale reinforced concrete(RC)frame *** material pipes and different methods for penetrating the reinforced concrete floors are combined to evaluate the difference in seismic *** response spectra and pipe acceleration amplification factors based on test data are discussed and compared with code provisions.A seismic fragility study of displacement demand is conducted based on numerical *** acceleration response and displacement response of different combinations are *** results show that the combination of different pipe materials and different passing-through methods can cause obvious differences in the seismic response of indoor riser pipes.

关键词： water supply pipe different materials shaking table test amplification factor seismic fragility