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Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 843-857 doi: 10.1007/s11709-022-0834-0

Abstract: compressive strength of concrete, stiffness ratio between ETS bars and steel stirrups, and use of ETS strengtheningA promising method based on the bond mechanism between ETS strengthening and concrete is then proposed

Keywords： embedded through-section     strengthening     fiber-reinforced polymer     finite element     shear strength model     bond mechanism    

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Mechanism and control of the long-term performance evolution of structures

Zhiqiang DONG, Gang WU, Hong ZHU, Haitao WANG, Yihua ZENG

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1039-1048 doi: 10.1007/s11709-020-0667-7

Abstract: It is well known that structural properties degrade under long-term environmental exposure and loading and that the degradation rate is controlled by inherent physical and chemical degradation mechanisms. The elucidation of the degradation mechanisms and the realization of effective long-term performance degradation control have been a research frontier in the field of civil engineering in recent years. Currently, the major topics that concern this research frontier include revealing the physical and chemical mechanisms of structural performance evolution under long-term environmental exposure and loading and developing structural performance degradation control technologies based on fiber-reinforced materials, for example, fiber-reinforced polymers (FRPs) and fabric-reinforced cementitious matrix (FRCM). In addition, there are novel structural performance control technologies, such as using a shape memory alloy (SMA) and self-healing concrete. This paper presents a brief state-of-the-art review of this topic, and it is expected to provide a reference for subsequent research.

Keywords： degradation mechanism     performance evaluation strengthening     FRP     FRCM    

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Comprehensive strengthening mechanism of steel based on nano scale cementite precipitates

Fu Jie,Li Guangqiang,Yu Yueguang,Mao Xinping,Fang Keming

Strategic Study of CAE 2011, Volume 13, Issue 1,   Pages 31-42

Abstract:

This paper summarized the status of comprehensive strengthening mechanismTiC, which can not be ignored.The precipitation strengthening contributions of nano-scale precipitatesand grain refinement strengthening.A formula for calculate the yield strength of low carbon steel isof nano-scale precipitates and the comprehensive strengthening mechanism of steels matches the experimentalThe reason for grain refinement strengthening can not directly plus dislocation strengthening and the

Keywords： yield strength     nano-scale cementite     nano-scale titanium carbide     precipitation strengthening     comprehensivestrengthening of steel    

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Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated

Frontiers of Structural and Civil Engineering   Pages 1100-1116 doi: 10.1007/s11709-023-0967-9

Abstract: The behavior of this system is evaluated in terms of both the flexural and shear strengthening of reinforcedEight beams are designed to assess the effectiveness of the FRCM system in terms of flexural strengtheningThe parameters investigated for flexural strengthening are the number of layers, span/depth ratio, andthe strengthening method.In the shear-strengthened specimens, the effects of the span/depth ratio and strengthening system type

Keywords： fiber-reinforced cementitious matrix     flexural strengthening     shear strengthening     carbon fiber-reinforced    

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Study on a kind of new strengthening buffer operators and numerical simulations

Cui Jie,Dang Yaoguo,Liu Sifeng,Xie Naiming

Strategic Study of CAE 2010, Volume 12, Issue 2,   Pages 108-112

Abstract: >According to the theory of prior using of new information,based on the research of already existed strengtheningbuffer operators, some new strengthening buffer operators are established.The flaw that the existing strengthening buffer operators can,t fully use new information of the dataAn example simulation shows, compared with the existing strengthening buffer operators, the kind of newstrengthening buffer operators increases the forecast precision of GM(1,1) remarkably.

Keywords： operator     strengthening buffer operator     geometry average strengthening operator     GM(1     1)    

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STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 503-509 doi: 10.15302/J-FASE-2023528

Abstract:

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Keywords： GREEN     AGRICULTURAL     PROMOTE     POLLUTION     SOURCE     DEVELOPMENT     POINT     STRENGTHENING     CONTROL    

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Experimental monitoring of the strengthening construction of a segmental box girder bridge and field

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: Prestressed concrete segmental box girder bridges are composed of short concrete segments that are either precast or cast in situ and then joined together by longitudinally post-tensioning internal, external, or mixed tendons. The objectives of this study are to monitor the construction process of the external prestressing tendons to strengthen the bridge structure and perform a field load test to measure the strain and the deflection of the anchorage devices of the external prestressing tendons to determine the state of these devices after tension forces are applied. The monitoring process of the external prestressing tendons construction includes inspecting the cracks in the diaphragm anchorage and the deviation block devices before the tension forces are applied to the external tendons; measuring the deformation of the steel deviation cross beam during the tension process; measuring the deformation of the box girder after different levels of tension forces are applied; measuring the elongation of the external tendons in each level of the tension; and measuring the natural frequency of the external tendons after the tension process is complete. The results of the monitoring process show that the measured values of the deformation, the elongation, and the natural frequency meet the requirements. Therefore, there is no damage during the construction and the tensioning of the external prestressing tendons. A field load test is performed to the anchorage beam, the steel deviation block devices, and the steel deviation cross beam. The field load test results of the anchorage devices show that the values of the strains, the stresses, and the deflection are less than the respective allowable limit values in the requirements. Therefore, the anchorage devices have sufficient strength, and the working state is good after the tension forces are applied to the external prestressing tendons.

Keywords： prestressed concrete     box girder     monitoring     external tendons     strain     deflection    

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Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 145-160 doi: 10.1007/s11709-022-0806-4

Abstract: The findings of this study indicate that the sprayable strain-hardening FRCC has a good potential for strengthening

Keywords： strain-hardening cementitious composites     engineered cementitious composites     sprayable     shotcrete     strengthening    

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New progress in study of the technology of strengthening structures with prestressed fiber reinforced

Lu Yiyan,Chen Juan,Huang Yinshen,Wu Tao

Strategic Study of CAE 2008, Volume 10, Issue 8,   Pages 40-44

Abstract:

The application of fiber reinforced plastics (FRP) in strengthening projectsPractices and theories have testified that the technology of strengthening structures with prestressedA concise state-of-the-art survey and new progress of the technology of strengthening structures withprestressed FRP are presented, including studies in terms of concrete structures strengthening withprestressed FRP, steel structures strengthening with prestressed FRP and the key problems in its practical

Keywords： fiber reinforced plastics     strengthening technology     concrete structures     steel structures     research    

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Calculation of diagonal section and cross-section bending capacity for strengthening RC structure using

Shouping SHANG , Fangyuan ZHOU , Wei LIU ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3,   Pages 330-338 doi: 10.1007/s11709-009-0046-x

Abstract: structures nationwide, as well as the rapid development of innovative building materials, the adoption of strengtheningHigh-performance ferrocement laminate (HPFL) is an effective method of strengthening concrete structureThis paper introduces the formula of cross-section bending capacity for strengthening concrete beams

Keywords： RC beams     high-performance ferrocement laminate (HPFL)     inorganic material     reinforcement    

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A Nitride-Reinforced NbMoTaWHfN Refractory High-Entropy Alloy with Potential Ultra-High-Temperature Engineering Applications Article

Yixing Wan,Yanhai Cheng,Yongxiong Chen,Zhibin Zhang,Yanan Liu,Haijun Gong,Baolong Shen,Xiubing Liang

Engineering 2023, Volume 30, Issue 11,   Pages 110-120 doi: 10.1016/j.eng.2023.06.008

Abstract: The HfN phase has a significant effect on strengthening due to its high structural stability and sluggish

Keywords： Refractory high-entropy alloy     High temperature     Mechanical property     Microstructure     Strengthening mechanism    

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Strengthening and Softening of Ferrite+Pearlite Steels Produced by Thin Slab Casting and Rolling

Fu Jie,Wu Huajie,Liu Yangchun

Strategic Study of CAE 2008, Volume 10, Issue 4,   Pages 65-72

Abstract:

Based on the principle of the integrated strengthening of steel, thestrengthening and the softening of HSLC steel have been studied by controlling the precipitation of carbon

Keywords： HSLC steel     strengthening     softening     basal plate for cold rolling     super steel    

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Molecular tailoring to improve polypyrrole hydrogels’ stiffness and electrochemical energy storage capacity

Evelyn Chalmers, Yi Li, Xuqing Liu

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 684-694 doi: 10.1007/s11705-019-1817-0

Abstract: This research looks at ways of tailoring and improving the stiffness of polypyrrole hydrogels for use as flexible supercapacitor electrodes. Molecules providing additional cross-linking between polypyrrole chains are added post-polymerisation but before gelation, and are found to increase gel stiffness by up to 600%, with the degree of change dependent on reactant type and proportion. It was also found that addition of phytic acid led to an increase in pseudocapacitive behaviour of the hydrogel, and thus a maximum specific capacitance of 217.07 F·g could be achieved. This is an increase of 140% compared to pristine polypyrrole hydrogels produced by this method.

Keywords： supercapacitor     polypyrrole     hydrogel     strengthening     electrochemical    

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Strengthening the R&D of Engineering Technology and Developing the Polyester Industry of China

Jiang Shicheng

Strategic Study of CAE 2001, Volume 3, Issue 3,   Pages 27-33

Abstract:

Due to the technology development and market demand, the PET industry has been developed very quickly in China, Asia and the whole world in the last twenty years. The focus of the PET industry has been moving to Asia and the Asia´s PET industry has been brought to a new stage. The technical development, market, production capacity and output of PET and polyester fibres industry at home and abroad are analyzed and forecasted to find out the gap between China and the developed countries in this field. The stress is placed on the development and research of the domestic PET engineering technology and the proven experiences. Some proposals are put forward.

Keywords： polyester     technology     development     market     suggestion    

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Title Author Date Type Operation

Shear strength model of the reinforced concrete beams with embedded through-section strengthening bars

Linh Van Hong BUI; Phuoc Trong NGUYEN

Journal Article

Mechanism and control of the long-term performance evolution of structures

Zhiqiang DONG, Gang WU, Hong ZHU, Haitao WANG, Yihua ZENG

Journal Article

Comprehensive strengthening mechanism of steel based on nano scale cementite precipitates

Fu Jie,Li Guangqiang,Yu Yueguang,Mao Xinping,Fang Keming

Journal Article

Strengthening of reinforced concrete beams using fiber-reinforced cementitious matrix systems fabricated

Journal Article

Study on a kind of new strengthening buffer operators and numerical simulations

Cui Jie,Dang Yaoguo,Liu Sifeng,Xie Naiming

Journal Article

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Journal Article

Experimental monitoring of the strengthening construction of a segmental box girder bridge and field

Ali Fadhil NASER, Zonglin WANG

Journal Article

Strengthening of the concrete face slabs of dams using sprayable strain-hardening fiber-reinforced cementitious

Journal Article

New progress in study of the technology of strengthening structures with prestressed fiber reinforced

Lu Yiyan,Chen Juan,Huang Yinshen,Wu Tao

Journal Article

Calculation of diagonal section and cross-section bending capacity for strengthening RC structure using

Shouping SHANG , Fangyuan ZHOU , Wei LIU ,

Journal Article

A Nitride-Reinforced NbMoTaWHfN Refractory High-Entropy Alloy with Potential Ultra-High-Temperature Engineering Applications

Yixing Wan,Yanhai Cheng,Yongxiong Chen,Zhibin Zhang,Yanan Liu,Haijun Gong,Baolong Shen,Xiubing Liang

Journal Article

Strengthening and Softening of Ferrite+Pearlite Steels Produced by Thin Slab Casting and Rolling

Fu Jie,Wu Huajie,Liu Yangchun

Journal Article

Strengthening Scientific and Technological Innovation-China Academy of Forestry Sciences

Journal Article

Molecular tailoring to improve polypyrrole hydrogels’ stiffness and electrochemical energy storage capacity

Evelyn Chalmers, Yi Li, Xuqing Liu

Journal Article

Strengthening the R&D of Engineering Technology and Developing the Polyester Industry of China

Jiang Shicheng

Journal Article