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Experimental monitoring of the strengthening construction of a segmental box girder bridge and fieldtesting of external prestressing tendons anchorage

Ali Fadhil NASER, Zonglin WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 308-320 doi: 10.1007/s11709-012-0140-3

Abstract: construction process of the external prestressing tendons to strengthen the bridge structure and perform a fieldA field load test is performed to the anchorage beam, the steel deviation block devices, and the steelThe field load test results of the anchorage devices show that the values of the strains, the stresses

Keywords： prestressed concrete box girder monitoring external tendons strain deflection

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Field testing of geosynthetic-reinforced and column-supported earth platforms constructed on soft soil

Qiangong CHENG,Jiujiang WU,Dongxue ZHANG,Fengping MA

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2, Pages 124-139 doi: 10.1007/s11709-014-0255-9

Abstract: By analyzing the data of a 15-month long field monitoring project, the bearing behavior and effectiveness

Keywords： geosynthetic-reinforced and column-supported (GRCS) earth platforms soft soil bearing behavior settlement and deformation fieldtesting

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Progress in terahertz nondestructive testing: A review

Shuncong ZHONG

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 3, Pages 273-281 doi: 10.1007/s11465-018-0495-9

Abstract: Recently, THz nondestructive testing (NDT) technology has become an interesting topic.

Keywords： terahertz pulsed imaging (TPI) nondestructive testing (NDT) composite material thermal barrier coating

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Sonic General Non-destructive Testing Technique

Chen Jimao

Strategic Study of CAE 2000, Volume 2, Issue 4, Pages 64-69

Abstract:

This paper describes new general multi-mode non-destructive testing (NDT) of composite materials andThis technique which is based on sonic and ultrasonic testing performs five different modes of testing

Keywords： sonic general testing general non-destructive testing (NDT) non-destructive testing of composite materials mechanical impedance analysis (MIA) vibration analysis (VA) resonance testing

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Novel sensing techniques for full-scale testing of civil structures

Kaoshan DAI, Zhenhua HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 240-256 doi: 10.1007/s11709-012-0172-8

Abstract: Performing full-scale structural testing is an important methodology for researchers and engineers inFull scale testing helps the researchers understand civil infrastructures’ loading scenarios, behaviorsTo conduct a full-scale structural testing, sensors are used for data acquisitions.effective sensors, this study reviewed and categorized new sensing techniques for full-scale structural testingThe researchers of this study categorized sensors used for civil-infrastructure testing into traditional

Keywords： sensing technique full-scale testing wireless sensor remote sensing LiDAR laser vibrometer

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Permeability testing of drilling core sample from pavement

WANG Suda, TANG Zhengguang, NING Xiaojun, WU Peiguan, XING Pingyi

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4, Pages 391-394 doi: 10.1007/s11709-008-0045-3

Abstract: equipment is used to measure the permeability coefficient of the pavement drilling core sample and relevant testingTesting drilling core samples from a certain highway of Yunnan province has been proven to be feasible

Keywords： province material feasible permeability coefficient equipment

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Shaking table testing of hard layered soil-pile-structure interaction system

LI Peizhen, REN Hongmei, LU Xilin, SONG Heping, CHEN Yueqing

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3, Pages 346-352 doi: 10.1007/s11709-007-0046-7

Abstract: Shaking table tests on a dynamic interaction system of hard layered soil, pile foundation and frame structure were carried out. The earthquake damage of the superstructure and foundation was reproduced. Based on these tests, several key issues about the seismic response of the dynamic soil-structure interaction (SSI) system were studied. The natural frequency of the system was less than that of the structure on rigid foundation if the SSI is not taken into account, while its damping ratio was larger than that of the structure. The mode shape of the system was different from that of the structure on the fixed base in that there were rocking and swinging at the foundation. Magnification or reduction of vibration transferred by soil was related to soil characteristic, excitation magnitude, and so on. Generally, sand magnifies vibration, while viscous powder soil dampens vibration. The components of the acceleration response at the top of the superstructure were based on the relative magnitude of the rocking stiffness, the swing stiffness of the foundation and the stiffness of the super-structure. The multi-direction excitations have little effect on the key issues of the horizontal SSI.

Keywords： super-structure Generally Magnification frequency different

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Sulfidation/regeneration multicycle testing of nickel-modified ZnFe

Wei LI, Jinju GUO, Jiejie HUANG, Jiaotao ZHAO

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4, Pages 435-440 doi: 10.1007/s11705-010-0506-9

Abstract: indicate that the nickel-modified ZnFe O keeps high reactivity and structural stability in the multicycle testing

Keywords： hot gas desulphurization nickel-modified ZnFe₂O₄ sulfidation/regeneration

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Steam turbine governor modeling and parameters testing for power system simulation

Ying LI, Chufeng PENG, Zenghui YANG

Frontiers in Energy 2009, Volume 3, Issue 2, Pages 198-203 doi: 10.1007/s11708-009-0004-2

Abstract: The theoretical modeling, parameters test and model correction for a steam turbine (ST) governor are discussed. A set of ST Governor system model for power system simulation is created based on this research. A power system simulation for an actual power grid accident is conducted using this new model and the comparison between the simulation and actual data show that the results are satisfactory.

Keywords： power system simulation ST governor system modeling parameters testing

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Vibration testing of a steel girder bridge using cabled and wireless sensors

Dapeng ZHU, Yang WANG, James BROWNJOHN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3, Pages 249-258 doi: 10.1007/s11709-011-0113-y

Abstract: This paper reports the field application of a wireless sensing system on a 4-span highway bridge locatedIn the next series of testing, 16 wireless accelerometers are installed under the deck of another bridge

Keywords： wireless sensing structural health monitoring (SHM) signal conditioning operating deflection analysis ambient vibration

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Standardization in testing methods for SOFC single cells

Tu Hengyong

Strategic Study of CAE 2013, Volume 15, Issue 2, Pages 33-38

Abstract:

Performance testing results of solid oxide fuel cell (SOFC) reveal complex relationship betweenStandardization in testing methods contributes to building of effective and sound connections betweenThe comparison can be made in regard to testing results from different institutions.construction, procedure formulation and standardized reporting of results for SOFC single cell testing

Keywords： solid oxide fuel cell performance testing testing routines standardization

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Gas testing technology for Puguang P302-2 well

Li Mingzhi,Nie Shirong,Zhang Wenchang,Cao Jiguang

Strategic Study of CAE 2010, Volume 12, Issue 10, Pages 61-64

Abstract:

On the basis of discussing the testing technology for high sulphur gasinterpretation in detail, we deeply researched and analyzed the blowout path, gas combustion technology, testingAnd storability in Puguang Gas Field has been further confirmed by the equation.It is also significant for developing new high sulphur gas field.

Keywords： cid gas field modified isochronal test technology incinerator gas test flowline

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The key technology of testing and commissioning of high-speed railway and the main testing achievements

Kang Xiong and Yao Jianwei

Strategic Study of CAE 2015, Volume 17, Issue 4, Pages 21-29

Abstract:

The connotation and necessity of testing and commissioning of high-speed railway is explained anddiscussed， combined with the engineering practice of testing and commissioning in China， the key technologyof testing and commissioning of high-speed railway are analyzed from the perspective of wheel/rail interactionThen the main achievements of testing and commissioning of high-speed railway in China are concluded，

Keywords： high-speed railway； system test； testing and commissioning； wheel/rail interaction； pantograph and ocs

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Transfer function solving, simulating and testing of thermal dynamics characteristics of a ballscrew

Junyong XIA, Bo WU, Youmin HU, Tielin SHI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2, Pages 233-241 doi: 10.1007/s11465-010-0014-0

Abstract: Based on the theory of heat transfer, the transfer function between the thermal deformation of any point on the lead screw and the temperature of heat sources of a ballscrew under the influence of multi-changeable heat sources is solved by using the Laplace transform method. By solving the amplitude-frequency characteristics and phase-frequency characteristics of the transfer function, the steady-state response of thermal deformation of the ballscrew is obtained, and the thermal dynamics characteristics of the lead screw under the influence of multi-heat sources are further studied. Comparing with the result of finite-element simulation, the theoretical analyzing result accords with the steady-state part of the finite-element simulating result. Through tests of the steady-state response of thermal deformation, the thermal dynamics characteristics are further studied. The curves of tests by and large accord with the theoretical analyzing result, which shows that the method of transfer function is correct and valid in solving the steady-state response of thermal deformation.

Keywords： ballscrew Laplace transform transfer function thermal dynamic characteristics

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Ambient vibration testing and updating of the finite element model of a simply supported beam bridge

Ivan Gomez ARAUJO, Esperanza MALDONADO, Gustavo Chio CHO

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3, Pages 344-354 doi: 10.1007/s11709-011-0124-8

Abstract: An ambient vibration test on a concrete bridge constructed in 1971 and calibration of its finite element model are presented. The bridge is characterized by a system of post-tensioned and simply supported beams. The dynamic characteristics of the bridge, i.e. natural frequencies, mode shapes and damping ratios were computed from the ambient vibration tests by using the Eigensystem Realization Algorithm (ERA). Then, these characteristics were used to update the finite element model of the bridge by formulating an optimization problem and then using Genetic Algorithms (GA) to solve it. From the results of the ambient vibration test of this type of bridge, it is concluded that two-dimensional mode shapes exist: in the longitudinal and transverse; and these experimentally obtained dynamic characteristics were also achieved in the analytical model through updating. The application of GAs as optimization techniques showed great versatility to optimize any number and type of variables in the model.

Keywords： modal analysis parameter identification ambient vibration test Eigensystem Realization Algorithm (ERA) method finite element method

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Title Author Date Type Operation

Experimental monitoring of the strengthening construction of a segmental box girder bridge and fieldtesting of external prestressing tendons anchorage

Ali Fadhil NASER, Zonglin WANG

Journal Article

Field testing of geosynthetic-reinforced and column-supported earth platforms constructed on soft soil

Qiangong CHENG,Jiujiang WU,Dongxue ZHANG,Fengping MA

Journal Article

Progress in terahertz nondestructive testing: A review

Shuncong ZHONG

Journal Article

Sonic General Non-destructive Testing Technique

Chen Jimao

Journal Article

Novel sensing techniques for full-scale testing of civil structures