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Study on anti crack design method for laminating crack at bottom slab in closure segment

Lin Haifeng,Zhang Dongdong and Zhao Qilin

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 106-112

Abstract: justify;">According to the phenomenon of laminating crack while tensioning the pre-stressed cables at bottomslab in closure segment for prestressed concrete continuous box girder bridges constructed by hangingmethod)models are established and the transverse and vertical stress between pre-stressed tendons at bottomslab in closure segment are obtained; the stress state and security of bottom slab under different failure

Keywords： bridge engineering     bottom slab     finite element method     failure criterion     biaxial stress    

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BUEES: a bottom-up event extraction system

Xiao DING,Bing QIN,Ting LIU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 7,   Pages 541-552 doi: 10.1631/FITEE.1400405

Abstract: In this paper, we present BUEES, a bottom-up event extraction system, which extracts events from the

Keywords： Event extraction     Unsupervised learning     Bottom-up    

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Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 323-334 doi: 10.1007/s11709-011-0119-5

Abstract: However, the gaps are constrained by the columns and the slab in a real PT self-centering building frameMoreover, a sliding slab is proposed to minimize restraints on the expansion of the PT frame.

Keywords： post-tensioned frame     frame expansion     column restraint     sliding slab     frame test     shake table test    

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Analysis of catchment evapotranspiration at different scales using bottom-up and top-down approaches

Xiangyu XU, Dawen YANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 65-77 doi: 10.1007/s11709-010-0002-9

Abstract: ., bottom-up approach) and a simple water-energy balance model (i.e., top-down approach) are used toFrom the analysis at different time scales through comparison of the top-down and the bottom-up methods

Keywords： catchment evapotranspiration     distributed hydrological model     water-energy balance model     top-down and bottom-up    

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Punching of reinforced concrete slab without shear reinforcement: Standard models and new proposal

Luisa PANI, Flavio STOCHINO

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1196-1214 doi: 10.1007/s11709-020-0662-z

Abstract: Reinforced concrete (RC) slabs are characterized by reduced construction time, versatility, and easier space partitioning. Their structural behavior is not straightforward and, specifically, punching shear strength is a current research topic. In this study an experimental database of 113 RC slabs without shear reinforcement under punching loads was compiled using data available in the literature. A sensitivity analysis of the parameters involved in the punching shear strength assessment was conducted, which highlighted the importance of the flexural reinforcement that are not typically considered for punching shear strength. After a discussion of the current international standards, a new proposed model for punching shear strength and rotation of RC slabs without shear reinforcement was discussed. It was based on a simplified load-rotation curve and new failure criteria that takes into account the flexural reinforcement effects. This experimental database was used to validate the approaches of the current international standards as well as the new proposed model. The latter proved to be a potentially useful design tool.

Keywords： punching shear strength     reinforced concrete     slabs     reinforcement ratio    

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Investigation of Cu leaching from municipal solid waste incinerator bottom ash with a comprehensive approach

Jun YAO, Wenbing LI, Fangfang XIA, Jing WANG, Chengran FANG, Dongsheng SHEN

Frontiers in Energy 2011, Volume 5, Issue 3,   Pages 340-348 doi: 10.1007/s11708-010-0131-9

Abstract: Municipal solid waste incinerator (MSWI) bottom ash is often reused as a secondary construction materialstudy used a comprehensive approach to characterize the leaching behavior of copper (Cu) from the MSWI bottomThe sequential extraction procedure (SEP) was adopted to analyze the speciation of Cu in the MSWI bottomBased on the multi-analysis of the results, Cu would be significantly released from the MSWI bottom ashwas not only affected by dissolved organic carbon, it was also limited by its speciation in the MSWI bottom

Keywords： MSWI bottom ash     Cu leaching     batch titration procedure     SEP    

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Characterization of chlorine and heavy metals for the potential recycling of bottom ash from municipal

Boran WU, Dongyang WANG, Xiaoli CHAI, Fumitake TAKAHASHI, Takayuki SHIMAOKA

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0847-9

Abstract: Industrial waste mixed with MSW is the main source of heavy metal in bottom ash.Chlorine content in bottom ash is controlled both by plastic and kitchen waste.Insoluble chlorine in Chinese MSWI bottom ash exists primarily as AlOCl.Bottom ash is an inevitable by-product from municipal solid waste (MSW) incineration plants.The insoluble chlorine in the MSW incineration bottom ash existed primarily as AlOCl, which was produced

Keywords： Bottom ash     Chlorine     Heavy metals     Waste inputs     Synchrotron X-ray diffraction     AlOCl    

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Leaching toxicity characteristics of municipal solid waste incineration bottom ash

Khamphe PHOUNGTHONG,Yi XIA,Hua ZHANG,Liming SHAO,Pinjing HE

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 399-411 doi: 10.1007/s11783-015-0819-5

Abstract: The continuously increasing production of municipal solid waste incineration bottom ash (MSWIBA) has

Keywords： Municipal solid waste incineration     bottom ash     alternative material     leaching tests     toxicity     Vibrio    

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Key Technical Issues Related to Super-high Concrete Slab Dam

Ma Hongqi,Cao Keming

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 4-10

Abstract: text-align: justify;">This essay summarizes the main technical points related to 100-meter-high concrete slabdam and analyzes the main problems and their causes of 200-meter-high concrete slab dam during construction Based on the main experiences of the super-high concrete slab dam built after the year of 2000, key technical issues related to 300-meter-high concrete slab dam that need research have been

Keywords： concrete slab dam     super-high dam     technology    

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Parametric study on seismic performance of self-centering reinforced concrete column with bottom-placed

Frontiers of Structural and Civil Engineering   Pages 1145-1162 doi: 10.1007/s11709-023-0945-2

Abstract: moment-resisting frame structures, a novel self-centering RC column with a rubber layer placed at the bottom

Keywords： seismic resilience     self-centering     rubber layer     flag-shaped hysteresis loop     parametric study    

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Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 4,   Pages 570-579 doi: 10.1007/s11783-013-0604-2

Abstract: constraint optimization method to establish the potential of crop residue recycling in China (CRRC) using a bottom-up

Keywords： China     crop residue     recycling potential     technology options    

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Bottom sealing construction technology for extralarge onland caisson

Du Hongchi and Yang Ning

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 19-22

Abstract: for the north anchor caisson of Taizhou Bridge, which is the largest quantity underwater concrete for bottomThis article presents the bottom sealing construction technology for the caisson of north anchor of TaizhouBridge mainly in the aspects of base cleaning, bottom sealing equipment arrangement and sealing concrete

Keywords： extra large on land caisson     bottom sealilng construction technology for caisson     Taizhou Bridge    

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Effect of eccentricity in reinforced concrete beam-column-slab connection under cyclic loading

Rooh ULLAH, Amjad NASEER, Muhammad FAHIM, Mohammad ASHRAF, Eid BADSHAH

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 390-398 doi: 10.1007/s11709-021-0690-3

Abstract: This study presents the experimental results of two half-scale eccentric beam-column-slab connections

Keywords： corner connection     eccentricity     strength degradation     stiffness degradation     energy dissipation     performance levels    

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Dynamics simulation of bottom high-sediment sea water movement under waves

Xueyi YOU , Wei LIU , Houpeng XIAO ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 312-315 doi: 10.1007/s11709-009-0037-y

Abstract: The movement of bottom high-sediment sea water under water waves, especially that of the high-sedimentwater layer close to the sea bottom, is important to the resuspension and settlement of sediment.provides a solid basis for understanding the resuspension and settlement of sediment and the formation of bottom

Keywords： volume of fluid (VOF) method     high sediment sea water     numerical simulation     interface trace     Navier-Stokes (N-S) theory    

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Influence of loading ratio on flat slab connections at elevated temperature: A numerical study

Rwayda Kh. S. AL-HAMD, Martin GILLIE, Safaa Adnan MOHAMAD, Lee S. CUNNINGHAM

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 664-674 doi: 10.1007/s11709-020-0620-9

Abstract: For reinforced concrete members subjected to high temperature, the degree of in-service loading, commonly expressed as the loading ratio, can be highly influential on the structural behavior. In particular, the loading ratio may be pivotal in relation to the phenomenon of load-induced thermal strain. Despite its potentially pivotal role, to date, the influence of the loading ratio on both material and structural behavior has not been explored in detail. In practice, real structures experience variation in imposed loading during their service life and it is important to understand the likely response at elevated temperatures across the loading envelope. In this paper, the effect of the loading ratio is numerically investigated at both material and structural level using a validated finite element model. The model incorporates a proposed constitutive model accounting for load-induced thermal strain and this is shown to outperform the existing Eurocode 2 model in terms of accuracy. Using the validated model, the specific case of flats slabs and the associated connections to supporting columns at various loading ratios are explored. For the cases examined, a marked difference in the structural behavior including displacement direction was captured from low to high loading ratios consistent with experimental observations.

Keywords： concrete     finite elements     fire     load-induced thermal strain     punching shear    

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Title Author Date Type Operation

Study on anti crack design method for laminating crack at bottom slab in closure segment

Lin Haifeng,Zhang Dongdong and Zhao Qilin

Journal Article

BUEES: a bottom-up event extraction system

Xiao DING,Bing QIN,Ting LIU

Journal Article

Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

Journal Article

Analysis of catchment evapotranspiration at different scales using bottom-up and top-down approaches

Xiangyu XU, Dawen YANG,

Journal Article

Punching of reinforced concrete slab without shear reinforcement: Standard models and new proposal

Luisa PANI, Flavio STOCHINO

Journal Article

Investigation of Cu leaching from municipal solid waste incinerator bottom ash with a comprehensive approach

Jun YAO, Wenbing LI, Fangfang XIA, Jing WANG, Chengran FANG, Dongsheng SHEN

Journal Article

Characterization of chlorine and heavy metals for the potential recycling of bottom ash from municipal

Boran WU, Dongyang WANG, Xiaoli CHAI, Fumitake TAKAHASHI, Takayuki SHIMAOKA

Journal Article

Leaching toxicity characteristics of municipal solid waste incineration bottom ash

Khamphe PHOUNGTHONG,Yi XIA,Hua ZHANG,Liming SHAO,Pinjing HE

Journal Article

Key Technical Issues Related to Super-high Concrete Slab Dam

Ma Hongqi,Cao Keming

Journal Article

Parametric study on seismic performance of self-centering reinforced concrete column with bottom-placed

Journal Article

Assessing the potential of crop residue recycling in China and technology options based on a bottom-up

Lili QU,Tianzhu ZHANG,Wei LU

Journal Article

Bottom sealing construction technology for extralarge onland caisson

Du Hongchi and Yang Ning

Journal Article

Effect of eccentricity in reinforced concrete beam-column-slab connection under cyclic loading

Rooh ULLAH, Amjad NASEER, Muhammad FAHIM, Mohammad ASHRAF, Eid BADSHAH

Journal Article

Dynamics simulation of bottom high-sediment sea water movement under waves

Xueyi YOU , Wei LIU , Houpeng XIAO ,

Journal Article

Influence of loading ratio on flat slab connections at elevated temperature: A numerical study

Rwayda Kh. S. AL-HAMD, Martin GILLIE, Safaa Adnan MOHAMAD, Lee S. CUNNINGHAM

Journal Article