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学者姓名：陈伟宏
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采用水泥基复合材料(engineering cementitious composite,ECC)替代混凝土可以提高结构在偶然荷载作用下的抗连续倒塌性能,但在悬链线大变形阶段钢筋与ECC间可能会出现黏结滑移破坏.基于分离式霍普金森压杆(SHPB)试验装置,进行了钢筋与ECC的动态黏结滑移性能试验,分析了 ECC强度等级、应变率、钢筋直径对极限黏结强度、刚度和滑移量的影响规律,获得了高应变率下钢筋与ECC的平均黏结滑移曲线,得到其黏结滑移破坏模式.并与静态黏结滑移试验进行对比,得到了动态黏结强度增强因子.进一步,通过钢筋开槽内贴应变片法,获得不同锚固位置的黏结应力及相对滑移的分布规律,提出黏结位置函数.最后,根据试验结果得到钢筋与ECC平均黏结滑移本构,进而乘以黏结位置函数得到考虑锚固位置影响的动态黏结滑移本构,为ECC结构构件设计及有限元分析提供试验依据和理论参考.
Keyword ：
ECC) ECC) 位置函数 位置函数 分离式霍普金森压杆(SHPB)试验 分离式霍普金森压杆(SHPB)试验 水泥基复合材料(engineering cementitious composite 水泥基复合材料(engineering cementitious composite 钢筋-ECC黏结滑移 钢筋-ECC黏结滑移 高应变率荷载 高应变率荷载 黏结滑移本构关系 黏结滑移本构关系
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| GB/T 7714 | 崔双双 , 孟瑶 , 陈伟宏 et al. 高应变率荷载作用下钢筋与ECC的黏结滑移关系研究 [J]. | 振动与冲击 , 2024 , 43 (1) : 71-82 . |
| MLA | 崔双双 et al. "高应变率荷载作用下钢筋与ECC的黏结滑移关系研究" . | 振动与冲击 43 . 1 (2024) : 71-82 . |
| APA | 崔双双 , 孟瑶 , 陈伟宏 , 孙浩 . 高应变率荷载作用下钢筋与ECC的黏结滑移关系研究 . | 振动与冲击 , 2024 , 43 (1) , 71-82 . |
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The authors regret that there was an error in the acknowledgments section of the published version. The correct version of Acknowledgement section is as follows with the correct project funding numbers: © 2023
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| GB/T 7714 | Chen, W. , Han, C. , Xie, Y. et al. Corrigendum to “Evaluation of compression self-healing performance of a smart cementitious composite SMA-ECC” [Constr. Build. Mater. vol. 409(15) (2023) 133917] (Construction and Building Materials (2023) 409, (S0950061823036358), (10.1016/j.conbuildmat.2023.133917)) [未知]. |
| MLA | Chen, W. et al. "Corrigendum to “Evaluation of compression self-healing performance of a smart cementitious composite SMA-ECC” [Constr. Build. Mater. vol. 409(15) (2023) 133917] (Construction and Building Materials (2023) 409, (S0950061823036358), (10.1016/j.conbuildmat.2023.133917))" [未知]. |
| APA | Chen, W. , Han, C. , Xie, Y. , Lin, B. , Cui, S. . Corrigendum to “Evaluation of compression self-healing performance of a smart cementitious composite SMA-ECC” [Constr. Build. Mater. vol. 409(15) (2023) 133917] (Construction and Building Materials (2023) 409, (S0950061823036358), (10.1016/j.conbuildmat.2023.133917)) [未知]. |
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Replacing concrete with engineering cementitious composite (ECC) can improve continuous collapse resistance of structure under accidental load, but bond-slip failure may occur between rebars and ECC during catenary large deformation stage. Here, based on split Hopkinson pressure bar (SHPB) testing device, dynamic bond-slip performance tests between rebars and ECC were conducted. Effects of ECC strength grade, strain rate, and rebar diameter on the ultimate bond strength, stiffness and slip amount were analyzed to obtain the average bond-slip curve between rebars and ECC under high strain rate load and their bond-slip failure mode. Compared with static bond-slip tests, the dynamic bond dynamic increase factor (DIF) was obtained. Furthermore, using the method of sticking strain gauges inside rebar groove, distribution laws of bond stress and relative slip at different anchoring positions were obtained and the bond position function was proposed. Finally, based on test results, the average bond-slip constitutive relation between rebars and ECC was obtained, this relation was then multiplied by the bond position function to obtain the dynamic bond-slip constitutive relation considering effects of anchor position, and provide test basis and theoretical reference for design and finite element analysis of ECC structural components. © 2024 Chinese Vibration Engineering Society. All rights reserved.
Keyword ：
Bridge decks Bridge decks Mechanical testing Mechanical testing Strain rate Strain rate
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| GB/T 7714 | Cui, Shuangshuang , Meng, Yao , Chen, Weihong et al. Bond-slip relation between rebars and ECC under high strain rate load [J]. | Journal of Vibration and Shock , 2024 , 43 (1) : 71-82 . |
| MLA | Cui, Shuangshuang et al. "Bond-slip relation between rebars and ECC under high strain rate load" . | Journal of Vibration and Shock 43 . 1 (2024) : 71-82 . |
| APA | Cui, Shuangshuang , Meng, Yao , Chen, Weihong , Sun, Hao . Bond-slip relation between rebars and ECC under high strain rate load . | Journal of Vibration and Shock , 2024 , 43 (1) , 71-82 . |
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A novel self-healing cementitious composite SMA-ECC is utilized to enhance corrosion resistance and maintain mechanical properties in chloride environment. The purpose of this study is to investigate the impact of the loading level on embedded steel rebar corrosion and the self-healing performance of SMA-ECC. The study examined the damage conditions, mechanical properties, and rebar corrosion resistance following a loading test. Chloride ingress depth and electrochemical tests were adopted to evaluate the corrosion resistance of the specimens. The findings reveal that SMA-ECC exhibits remarkable self-healing abilities in terms of damage recovery and restoration of mechanical properties. Cracks smaller than 50 mu m can achieve a 100 % closure rate in SMA-ECC. It was observed that specimens with less damage (50 %, 70 % damage conditions) displayed improved chloride resistance (SMA-ECC in 50 % damage condition has equivalent corrosion resistance in terms of corrosion current density compared to intact NC control specimens), leading to higher corrosion resistance for SMA-ECC according to the electrochemical test results.
Keyword ：
Corrosion resistance Corrosion resistance ECC ECC Loading level Loading level Self-healing Self-healing Shape memory alloy Shape memory alloy
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| GB/T 7714 | Chen, Weihong , Lin, Boxu , Zheng, Jianfeng et al. Effect of loading level on the corrosion resistance of a novel self-healing cementitious composite [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 90 . |
| MLA | Chen, Weihong et al. "Effect of loading level on the corrosion resistance of a novel self-healing cementitious composite" . | JOURNAL OF BUILDING ENGINEERING 90 (2024) . |
| APA | Chen, Weihong , Lin, Boxu , Zheng, Jianfeng , Cui, Shuangshuang , Zhuang, Shusen . Effect of loading level on the corrosion resistance of a novel self-healing cementitious composite . | JOURNAL OF BUILDING ENGINEERING , 2024 , 90 . |
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To evaluate the chloride ion corrosion resistance of proposed innovative self-healing concrete based on shape memory alloys (SMA) and engineering cementitious composites (ECC), a total of 2 kinds of 22 specimens were prepared. Chloride ion corrosion tests of self-healing SMA-ECC concrete under dry-wet cycles were carried out. It was found that the chloride ion erosion depths of SMA-ECC were significantly smaller than that of MC, and the growth rate of erosion depth of SMA-ECC was obviously smaller than that of MC after 15 dry-wet (dry and wet) corrosion cycles. The chloride ion content of SMA-ECC vanished at the erosion depth more than 10 mm, which was consistent with the test result of AgNO3 solution color-rendering test. Test results indicate that, compared to marine concrete (MC), SMA-ECC has a better chloride ion corrosion resistance behavior. Moreover, the chloride ion concentration of SMA-ECC at a chloride ion erosion depth of less than 10 mm decreased more significantly than that of MC, indicating that almost all chloride salt solution reacted in the outer layer of SMA-ECC, which is consistent with the conclusions of 4.1 and 4.2. Finally, based on the erosion distribution of chloride ions and Fick's second law, a calculation model describing the relationship between the apparent chloride ion diffusion coefficient and the boundary condition of the chloride ion content was proposed.
Keyword ：
chloride ion corrosion resistance chloride ion corrosion resistance dry-wet cycles dry-wet cycles marine concrete marine concrete non-destructive non-destructive self-healing self-healing
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| GB/T 7714 | Chen, Weihong , Liu, Yi , Qian, Hui et al. Chloride Ion Corrosion Resistance of Innovative Self-Healing SMA Fiber-Reinforced Engineering Cementitious Composites under Dry-Wet Cycles for Ocean Structures [J]. | BUILDINGS , 2023 , 13 (2) . |
| MLA | Chen, Weihong et al. "Chloride Ion Corrosion Resistance of Innovative Self-Healing SMA Fiber-Reinforced Engineering Cementitious Composites under Dry-Wet Cycles for Ocean Structures" . | BUILDINGS 13 . 2 (2023) . |
| APA | Chen, Weihong , Liu, Yi , Qian, Hui , Wu, Peng , Wu, Yingxiong , Liu, Fanghao . Chloride Ion Corrosion Resistance of Innovative Self-Healing SMA Fiber-Reinforced Engineering Cementitious Composites under Dry-Wet Cycles for Ocean Structures . | BUILDINGS , 2023 , 13 (2) . |
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The seismic performance of the innovative steel-reinforced reactive powder concrete (SRRPC) composite columns was evaluated via the cyclic experiments considering the steel shape ratio, axial compression ratio and the stirrup ratio. The SRRPC columns generally exhibited appreciable seismic behavior, great crack-resistance and excellent anti-spalling property. It was found that increasing the steel shape ratio from 4.20% to 5.35% can significantly enhance the ductility and the energy dissipation capacity. As the axial compression ratio increased from 0.1 to 0.3, the peak lateral load increased but the ductility significantly decreased. Increasing the stirrup ratio from 1.57% to 2.52% was not helpful for seismic performance in the pre-peak zone but was beneficial to the strength and ductility in the post-peak zone. Moreover, the average strength loss of the SRRPC columns with low axial compression ratio at the 4.5% drift ratio was less than 12.5%, satisfying the modern seismic drift criteria. Two coefficients, & beta;tu and k, for predicting the equivalent tensile strength were identified and compared to the suggested values from the specifications JGJ/T 465-2019 and T/CCPA 35-2022, respectively. An analytical model was successfully developed to predict the lateral load-bearing capacity. Good agreements were found between the experimental and analytical results.
Keyword ：
Composite column Composite column Hysteretic behavior Hysteretic behavior Lateral load -bearing capacity Lateral load -bearing capacity Reactive powder concrete Reactive powder concrete Steel -reinforced concrete Steel -reinforced concrete
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| GB/T 7714 | Zhang, Lingfeng , Wang, Kun , Zhang, Ming et al. Seismic performance of steel-reinforced reactive powder concrete columns [J]. | STRUCTURES , 2023 , 54 : 1788-1802 . |
| MLA | Zhang, Lingfeng et al. "Seismic performance of steel-reinforced reactive powder concrete columns" . | STRUCTURES 54 (2023) : 1788-1802 . |
| APA | Zhang, Lingfeng , Wang, Kun , Zhang, Ming , Yang, Yang , Liu, Fengcheng , Yang, Dongdong et al. Seismic performance of steel-reinforced reactive powder concrete columns . | STRUCTURES , 2023 , 54 , 1788-1802 . |
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An innovative bolt-connected precast concrete (PC) shear wall structural system has recently been proposed for middle and high-rise buildings in seismic regions. As a further research step, this paper aims to investigate the seismic behavior of PC coupled shear wall with different types of dissipative coupling beams. The quasi-static cyclic tests on two PC coupled shear wall specimens with friction-based coupling beam (FCB) and yielding-based coupling beam (YCB) were conducted. Moreover, nonlinear finite element models of the specimens were established and validated with the experimental results. The results demonstrated that the proposed dissipative coupling beams can effectively couple the wall panels in elastic field, whilst they can sustain large plastic deformation adding to the structural assembly a relevant source of energy dissipation under thresholded actions. Whilst the specimen with YCB exhibited large overstrength in plastic field, the specimen with FCB provided a more stable plateau capacity associated to enhanced deformation capacity, ductility and energy dissipation. Moreover, the FCB resulted practically undamaged and immediately reusable at the end of the test, whilst the YCB was found highly plasticized and locally torn. In addition, the detailed finite element models of the test specimens accurately predicted the experimental behavior.
Keyword ：
Dissipative coupling beams Dissipative coupling beams Numerical simulation Numerical simulation Precast concrete coupled walls Precast concrete coupled walls Quasi-static cyclic test Quasi-static cyclic test Seismic behavior Seismic behavior
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| GB/T 7714 | Fang, Qiang , Sun, Jian , Qiu, Hongxing et al. Seismic behavior of precast concrete coupled shear walls with yielding-based and friction-based coupling beams [J]. | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (2) . |
| MLA | Fang, Qiang et al. "Seismic behavior of precast concrete coupled shear walls with yielding-based and friction-based coupling beams" . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING 23 . 2 (2023) . |
| APA | Fang, Qiang , Sun, Jian , Qiu, Hongxing , Dal Lago, Bruno , Chen, Weihong . Seismic behavior of precast concrete coupled shear walls with yielding-based and friction-based coupling beams . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (2) . |
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This study investigated the effect of sustained loading on the cumulative damage of a newly developed smart cement-based self-healing composite material (SMA-ECC). SMA-ECC is composed of engineered cementitious composite (ECC) and shape memory alloy (SMA) fibers. A uniaxial compressive test with five predefined loading levels (0%, 30%, 40%, 50%, and 60% of compressive strength) was conducted on SMA-ECC hollow-cylindrical specimens and ECC control hollow-cylindrical specimens. The cumulative damage was mainly determined by changes in the total water absorption of different groups of specimens during three different periods (not loaded, at a predefined loading level, and after unloading). A normalized water content index was proposed to couple the effects of self-healing, sustained loading, and cumulative damage. The test results indicate that the cumulative water absorption of SMA-ECC was 35% lower than that of ECC, which may indicate less irreparable damage. In addition, the self-healing ability of SMA-ECC specimens under different compression load levels was evaluated through normalized water content analysis. SMA-ECC exhibited a 100% repair rate at load levels of 30% and 40%. At a higher load level of 60%, the repair rate of SMA-ECC was 76%. These results collectively emphasize the significant impermeability and self-healing performance of SMA-ECC after unloading.
Keyword ：
engineered cementitious composites engineered cementitious composites loading level loading level self-repairing self-repairing sustained compressive loading sustained compressive loading water absorption water absorption
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| GB/T 7714 | Chen, Weihong , Han, Chunhui , Liu, Yi et al. Experimental Investigation of Cumulative Damage and Self-Healing Properties of Smart Cementitious Composite under Continuous Compression Load [J]. | MATERIALS , 2023 , 16 (18) . |
| MLA | Chen, Weihong et al. "Experimental Investigation of Cumulative Damage and Self-Healing Properties of Smart Cementitious Composite under Continuous Compression Load" . | MATERIALS 16 . 18 (2023) . |
| APA | Chen, Weihong , Han, Chunhui , Liu, Yi , Feng, Kai , Zhuang, Shusen . Experimental Investigation of Cumulative Damage and Self-Healing Properties of Smart Cementitious Composite under Continuous Compression Load . | MATERIALS , 2023 , 16 (18) . |
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To study the seismic strengthening of damaged reinforced concrete (RC) frames using CFRP sheets, this study designed and tested the scaled 2-bay and 2-storey RC frame specimens. After applying a low cyclic horizontal load to simulate the initial damage to the specimen in an earthquake disaster, CFRP was used to strengthen the joints of the damaged RC frame. Pseudo-static tests of strengthened specimens and counterpart specimens were then carried out. Seismic performance, including stiffness, load capacity, ductility and energy dissipation were further analyzed. The failure mode of strengthened RC frame structures showed excellent ductility. The results demonstrated that the strengthening method involving wrapping CFRP can significantly improve the maximum horizontal bearing capacity, initial stiffness and energy dissipation capacity of the non-ductile reinforced concrete frame structure. The average displacement ductility coefficient of strengthened specimen can be enhanced to 3.41 compared with that of counterpart specimen (3.00). The pushover analysis based on the OpenSees model determined that the prototype frame with CFRP strengthening can maintain structural integrity and safety, with its maximum interstorey displacement angle below the limit of seismic specification (i.e., 1/50 in a severe earthquake). This study can contribute to the development of practical and efficient methods for restoring and improving the performance of damaged RC frames in seismic-prone regions.
Keyword ：
CFRP CFRP earthquake-damaged RC frames earthquake-damaged RC frames initial damage initial damage pseudo-static test pseudo-static test seismic strengthening seismic strengthening
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| GB/T 7714 | Wang, Yao , Chen, Weihong , Li, Dong et al. Experimental and Numerical Investigations of the Seismic Performance of Reinforced Concrete Frames Strengthened with CFRP Sheets [J]. | BUILDINGS , 2023 , 13 (9) . |
| MLA | Wang, Yao et al. "Experimental and Numerical Investigations of the Seismic Performance of Reinforced Concrete Frames Strengthened with CFRP Sheets" . | BUILDINGS 13 . 9 (2023) . |
| APA | Wang, Yao , Chen, Weihong , Li, Dong , Xu, Hongguang , Zhang, Feng , Guo, Xiao . Experimental and Numerical Investigations of the Seismic Performance of Reinforced Concrete Frames Strengthened with CFRP Sheets . | BUILDINGS , 2023 , 13 (9) . |
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Several issues persist in the design and construction of conventional prestressed concrete encased steel (CES) frame structures. This includes the need to strengthen the steel flanges and webs during the passage of prestressed tendons and longitudinal reinforcements through the joint, and insufficient compaction of the concrete cast in the joint core. Therefore, a novel type of prestressed CES frame structure was developed using concrete-encased steel angle (CESA) columns to replace the conventional CES columns. To investigate the seismic shear performance of this new type of prestressed composite joints to propose a method for predicting the shear capacity of joint cores, this study performed tests and nonlinear analysis on three prestressed joints and one nonprestressed joint under low cyclic loading. The failure patterns, energy dissipation, stiffness degradation, deformation recovery performance, and ductility properties were examined for these joints. The effects of prestress level, axial compression ratio, web thickness, stirrup ratio, and steel angle ratio are also discussed. Two formulas are proposed to predict the shear capacity of joint cores based on the fitting of tests and finite element analysis. The results revealed that the oblique crushing of concrete occurred in the joint core at the peak load, resulting in shear failure. Increasing the thickness of the steel web effectively enhanced the horizontal peak load to increase the shear capacity in the joint core. However, an increase in the axial compression ratio may reduce ductility. The formulas developed to predict the shear capacity of the joint core exhibited much higher accuracy, where the simplified practical formula can facilitate convenient design implementation. Overall, these findings demonstrate excellent seismic shear behavior for prestressed composite joints while providing technical support for applications in such types of prestressed frame structures.
Keyword ：
Composite joint Composite joint Concrete-encased steel angle column Concrete-encased steel angle column Hysteretic behavior Hysteretic behavior Prestressing Prestressing Shear capacity Shear capacity
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| GB/T 7714 | Wang, Kun , Shi, Tianyu , Omar, Ahmed Ahmad et al. Study on seismic performance of prestressed composite joint with CESA columns [J]. | JOURNAL OF BUILDING ENGINEERING , 2023 , 82 . |
| MLA | Wang, Kun et al. "Study on seismic performance of prestressed composite joint with CESA columns" . | JOURNAL OF BUILDING ENGINEERING 82 (2023) . |
| APA | Wang, Kun , Shi, Tianyu , Omar, Ahmed Ahmad , Mohibullah, Mozumder , Luo, Huihui , Chen, Weihong et al. Study on seismic performance of prestressed composite joint with CESA columns . | JOURNAL OF BUILDING ENGINEERING , 2023 , 82 . |
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