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Pretest analysis of shake table response of a two-span steel girder bridge incorporating accelerated bridge construction connections

Elmira SHOUSHTARI, M. Saiid SAIIDI, Ahmad ITANI, Mohamed A. MOUSTAFA

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 169-184 doi: 10.1007/s11709-019-0590-y

Abstract: This paper presents pretest analysis of a shake table test model of a 0.35-scale, two-span, steel plate girder bridge. The objective of pretest analysis was to obtain an insight on the seismic response of the bridge model during the shake table tests. The bridge included seat type abutments, full-depth precast deck panels, and a two-column bent in which columns were pinned to the footing and integral with superstructure. Six accelerated bridge construction connections were incorporated in the bridge model. An analytical model was developed in OpenSees and was subjected to ten input bi-directional earthquake motions including near-fault and far-field records. The overall seismic response of the bridge was satisfactory for all the earthquake records at 100%, 150%, and 200% design level. All connections and capacity-protected components remained elastic, and the average ductility capacity surpassed the ductility demand even at 200% design level. Using experimental fragility curves developed for RC bridge columns, it was predicted that there was a probability of 45% that columns would undergo the imminent failure in the last run and a probability of 30% for their failure.

Keywords： shake table test     accelerated bridge construction     steel girder bridge     OpenSEES     UHPC     simple for dead continuousfor live    

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A simple method for evaluating liquefaction potential from shear wave velocity

Lianyang ZHANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 178-195 doi: 10.1007/s11709-010-0023-4

Abstract: This paper develops a simple method for evaluating the liquefaction potential of soils from shear waveThe developed method uses the measured data directly and in a very simple way.Comparisons indicate that the developed simple method has a higher success rate for evaluating liquefactionA case study is presented to illustrate the application of the developed simple method and further confirms

Keywords： liquefaction     earthquake     simple method     shear wave velocity     case history introduction    

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Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Frontiers of Structural and Civil Engineering   Pages 981-993 doi: 10.1007/s11709-023-0979-5

Abstract: bridge as a multiple frequency-multiplication harmonic load on the modal coordinates of a linear elastic simpleverify the occurrence of high-harmonic forced resonance, numerical tests were conducted on single-span simpleFor the investigated single-span simple beams, the moving vehicle carriage heaving oscillation modulates

Keywords： forced vibration     linear Euler beam     moving load     harmonic structure     frequency modulation     end restraints    

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Construction engineering management culture shift: Is the lowest tender offer dead?

Eric SCHEEPBOUWER, Douglas D. GRANSBERG, Carla Lopez del PUERTO

Frontiers of Engineering Management 2017, Volume 4, Issue 1,   Pages 49-57 doi: 10.15302/J-FEM-2017014

Abstract: The procurement of public construction projects must walk a fine line between the corruption of state officials and collusion of contractors. The method of awarding projects to the lowest responsible tenderer was originally implemented to guard against corruption of state officials. However, an investigation of the construction industry in the Canadian province of Quebec showed that lowest-tender-offer procurement gave rise to collusion of companies tendering for the contracts. Alternatively, best-value procurement has been used for decades, but here problems arise owing to the necessity of subjective judging of measures other than price to compare bids, giving rise to time- and money-consuming protests. The paper proposes a compelling argument that the construction engineering management (CEM) culture should refocus its efforts on enhancing project cost certainty rather than merely searching for means to design a project in a manner that produces the lowest initial cost, and awards the construction to the lowest tender offer that focuses on cost savings during the project development and delivery process. The difference in the two approaches is subtle but extremely important. To make the transition, the engineering management tools must be advanced to the next level. This means that all project control tools for managing cost, schedule, and technical scope must be transformed from working in the deterministic mode to the stochastic mode, thus making the probability of completing the project within or below its official budget the primary decision criterion. To do so, CEMs must accept that there is a benefit in paying more for an alternative that increases cost certainty for the entire project. The authors of this paper hope that it will provide the grist for a more general dialog across all industry sectors where engineering management is practiced.

Keywords： cost certainty     lowest responsible bid     best value     public procurement     construction engineering management culture    

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Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria

Hong’en QUAN, He BAI, Yang HAN, Yong KANG, Jiao SUN

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 177-184 doi: 10.1007/s11705-013-1324-7

Abstract: The biosorption properties of dead sulfate reducing bacteria (SRB) for the removal of Cu(II) and Fe(III

Keywords： sulfate reducing bacteria     biosorption     Cu(II)     Fe(III)    

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Experiments on channel columns with inclined simple edge stiffeners under compression loading

WANG Chungang, ZHANG Yaochun, ZHANG Zhuangnan

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 312-321 doi: 10.1007/s11709-007-0041-z

Abstract: order to investigate the compression behavior of pin-ended cold-formed channel columns with inclined simple

Keywords： different     post-buckling strength     capacity     distortional buckling     Furthermore    

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A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities

WANG Zheng, ZHANG Bingru, LI Fengting

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 454-458 doi: 10.1007/s11783-007-0072-7

Abstract: Coupled ZrO/ZnO photocatalyst was prepared with a simple precipitation method with cheap raw

Keywords： objective     ZrO/ZnO photocatalyst     photocatalyst     precipitation     degradation    

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A simple multi-wave algorithm for the uncapacitated facility location problem

Fred GLOVER, Saïd HANAFI, Oualid GUEMRI, Igor CREVITS

Frontiers of Engineering Management 2018, Volume 5, Issue 4,   Pages 451-465 doi: 10.15302/J-FEM-2018038

Abstract: We propose a simple multi-wave algorithm for solving the Uncapacitated Facility Location Problem (UFLP

Keywords： discrete optimization     UFLP     multi-wave optimization     strategic oscillation     tabu search    

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Complete set technologies and equipment for 900 t simple-supported box beam construction in high-speed

Wang Qingming,Liu Linsheng

Strategic Study of CAE 2011, Volume 13, Issue 4,   Pages 75-80

Abstract:

Complete set technologies and equipment for 900 t simple supported boxare introduced in this paper, including the pre fabrication technologies and equipment of the 900 t simplelaying and erection technologies and equipment, construction technologies and equipment of the 900 t simple

Keywords： high speed railway     simple supported box beam     construction technology    

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advances in small molecule fluorescent probes for simultaneous imaging of two bioactive molecules in live

Yongqing Zhou, Xin Wang, Wei Zhang, Bo Tang, Ping Li

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 4-33 doi: 10.1007/s11705-021-2041-2

Abstract: The interrelationships and synergistic regulations of bioactive molecules play pivotal roles in physiological and pathological processes involved in the initiation and development of some diseases, such as cancer and neurodegenerative and cardiovascular diseases. Therefore, the simultaneous, accurate and timely detection of two bioactive molecules is crucial to explore their roles and pathological mechanisms in related diseases. Fluorescence imaging associated with small molecular probes has been widely used in the imaging of bioactive molecules in living cells and due to its excellent performances, including high sensitivity and selectivity, noninvasive properties, real-time and high spatial temporal resolution. Single organic molecule fluorescent probes have been successively developed to simultaneously monitor two biomolecules to uncover their synergistic relationships in living systems. Hence, in this review, we focus on summarizing the design strategies, classifications, and bioimaging applications of dual-response fluorescent probes over the past decade. Furthermore, future research directions in this field are proposed.

Keywords： bioactive molecules     fluorescent probes     in living cells and in vivo     review    

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First Pig-to-Live Human Xenotransplant Produces Mixed Results

Sarah C.P. Williams

Engineering 2022, Volume 16, Issue 9,   Pages 6-8 doi: 10.1016/j.eng.2022.07.006

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Three-dimensional composite Li metal anode by simple mechanical modification for high-energy batteries

Frontiers in Energy 2023, Volume 17, Issue 5,   Pages 569-584 doi: 10.1007/s11708-023-0875-7

Abstract: Under this condition, a novel method to construct 3D composite anode via simple mechanical modification

Keywords： lithium (Li)-ion battery (LIB)     Li metal battery     three-dimensional (3D) composite Li metal anode     mechanical modification     reducing local current density    

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A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

Frontiers in Energy 2014, Volume 8, Issue 1,   Pages 119-128 doi: 10.1007/s11708-013-0288-0

Abstract: A novel and simple control algorithm using digital signal processor (DSP) has been proposed and realized

Keywords： shunt active filter (SAF)     power quality     voltage source inverter (VSI)     digital signal processor (DSP)     total harmonic distortion (THD)     power factor improvement    

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A simple umbelliferone based fluorescent probe for the detection of nitroreductase

Adam C. Sedgwick, Alex Hayden, Barry Hill, Steven D. Bull, Robert B. P. Elmes, Tony D. James

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 311-314 doi: 10.1007/s11705-017-1697-0

Abstract: A simple nitrobenzyl-umbelliferone (NCOU1) was synthesised containing a nitroreductase (NTR) triggerThese results indicate that NCOU1 can be used as a simple assay for the detection of NTR.

Keywords： fragmentation     NCOU1     NTR     nitroreductase     nitrobenzyl-umbelliferone    

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A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 90-96 doi: 10.1007/s11705-019-1790-7

Abstract: We describe the synthesis and evaluation of an azulene-based chemodosimeter for nitrite. The probe was found to undergo two distinct color changes upon introduction aqueous nitrite ion. A near-instant formation of a grey color provides a qualitative indication of the presence of nitrite, followed by the formation of a deep-yellow/orange color, the endpoint from which quantitative data can be derived. The azulene probe exhibits 1:1 stoichiometry of reaction with nitrite in water, and is selective for nitrite over other anions. The azulene probe was applied to determine nitrite content in cured meat, and compared with the British Standard testing procedure (Griess test). The value obtained from the azulene-based probe agreed closely with the standard test. Our procedure only requires the preparation of one standard solution, instead of the three required for the standard Griess test.

Keywords： azulene     nitrite     diazoquinone    

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Title Author Date Type Operation

Pretest analysis of shake table response of a two-span steel girder bridge incorporating accelerated bridge construction connections

Elmira SHOUSHTARI, M. Saiid SAIIDI, Ahmad ITANI, Mohamed A. MOUSTAFA

Journal Article

A simple method for evaluating liquefaction potential from shear wave velocity

Lianyang ZHANG,

Journal Article

Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Journal Article

Construction engineering management culture shift: Is the lowest tender offer dead?

Eric SCHEEPBOUWER, Douglas D. GRANSBERG, Carla Lopez del PUERTO

Journal Article

Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria

Hong’en QUAN, He BAI, Yang HAN, Yong KANG, Jiao SUN

Journal Article

Experiments on channel columns with inclined simple edge stiffeners under compression loading

WANG Chungang, ZHANG Yaochun, ZHANG Zhuangnan

Journal Article

A simple and cheap method for preparation of coupled ZrO2/ZnO with high photocatalytic activities

WANG Zheng, ZHANG Bingru, LI Fengting

Journal Article

A simple multi-wave algorithm for the uncapacitated facility location problem

Fred GLOVER, Saïd HANAFI, Oualid GUEMRI, Igor CREVITS

Journal Article

Complete set technologies and equipment for 900 t simple-supported box beam construction in high-speed

Wang Qingming,Liu Linsheng

Journal Article

advances in small molecule fluorescent probes for simultaneous imaging of two bioactive molecules in live

Yongqing Zhou, Xin Wang, Wei Zhang, Bo Tang, Ping Li

Journal Article

First Pig-to-Live Human Xenotransplant Produces Mixed Results

Sarah C.P. Williams

Journal Article

Three-dimensional composite Li metal anode by simple mechanical modification for high-energy batteries

Journal Article

A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Subbaraman SRINATH, Chandan KUMAR, M. P. SELVAN

Journal Article

A simple umbelliferone based fluorescent probe for the detection of nitroreductase

Adam C. Sedgwick, Alex Hayden, Barry Hill, Steven D. Bull, Robert B. P. Elmes, Tony D. James

Journal Article

A simple, azulene-based colorimetric probe for the detection of nitrite in water

Lloyd C. Murfin, Carlos M. López-Alled, Adam C. Sedgwick, Jannis Wenk, Tony D. James, Simon E. Lewis

Journal Article