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学者姓名：陈永健
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Abstract ：
Cracking in concrete box girder bridges will have a significant impact on the safety and durability of the structure, and many box girder bridges which are in service have undergone varying degrees of cracking. Currently, the safety design of actual bridge projects place an emphasis on the stress or the load value of a cross section at the limit value specified in the code for safety control. This design method assumes that the member itself is of uniform and continuous material and is internally undamaged. However, the bridge structure is more or less cracked to varying degrees during the period from casting to construction to operation of the concrete members. In this paper, a finite element computational model of a three-span prestressed concrete box girder bridge with existing cracks is established based on the fracture mechanics theory, and the critical parameters of crack extension are introduced to evaluate the extension state of cracks. At the same time, the extended stability of the existing cracks of the box girder bridge is analyzed by considering the temperature effect, vehicle loading, and prestressing loss, and the sensitivity of crack extension under each working condition is investigated. The results show that, with the increase in crack length and depth, the crack expansion is promoted, but the effect is relatively small, and the maximum stress intensity factor is only 6.48 MPa mm1/2. Under the multi-factor coupling effect, the cracks show a composite crack expansion dominated by type I cracks, the longitudinal cracks of the existing base plate are in a stable state, the maximum value of the crack expansion critical parameter of the vertical cracks of the webs reaches 1.087, and there is a tendency to expand locally. The maximum value of the critical parameter for crack extension of the vertical crack in the web plate reaches 1.087, and there is a tendency towards local expansion. The crack extension evaluation criteria proposed in this paper have a certain reference value for crack extension research on similar concrete box girder bridges and provide a scientific basis for the optimized design of similar bridges. © 2024 by the authors.
Keyword ：
Box girder bridges Box girder bridges Bridge decks Bridge decks Concrete beams and girders Concrete beams and girders Concrete bridges Concrete bridges Continuous casting Continuous casting Crack propagation Crack propagation Plate girder bridges Plate girder bridges Prestressed beams and girders Prestressed beams and girders Prestressed concrete Prestressed concrete Steel bridges Steel bridges Stress intensity factors Stress intensity factors
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| GB/T 7714 | Chen, Yong-Jian , Huang, Xian-Cheng , Chen, Shi-Zheng et al. Propagation Effect Analysis of Existing Cracks in Box Girder Bridges Based on the Criterion of Compound Crack Propagation [J]. | Buildings , 2024 , 14 (9) . |
| MLA | Chen, Yong-Jian et al. "Propagation Effect Analysis of Existing Cracks in Box Girder Bridges Based on the Criterion of Compound Crack Propagation" . | Buildings 14 . 9 (2024) . |
| APA | Chen, Yong-Jian , Huang, Xian-Cheng , Chen, Shi-Zheng , Wang, Li-Yuan , Zhong, Ji-Wei , Cheng, Hui . Propagation Effect Analysis of Existing Cracks in Box Girder Bridges Based on the Criterion of Compound Crack Propagation . | Buildings , 2024 , 14 (9) . |
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Aiming at the problem of cable breakage of an asymmetric single-tower cable-stayed bridge by taking a single-tower cable-stayed bridge that has been in operation for more than 20 years as an engineering example, a spatial finite element model that reflected the actual stress state of the structure was established and a method for solving the time point of cable breakage was proposed. The results show that the strength of the main girder, pylon and cable could meet the stress requirements of the vibration caused by successive cable breaks, and the maximum dynamic displacement of the main girder did not exceed the stiffness limit. Although the breakage of the stay cable caused the stress in the adjacent position and the corresponding position on the opposite side of the tower to increase sharply, the stress fluctuation in other positions was small. The fluctuation of the dynamic stress of the cable tower was relatively small, but the displacement of the tower top changed greatly. The dynamic response of the cables breaking in succession was less than that of simultaneous breaking, and the structural vibration caused by cable breaking was not as severe as that caused by simultaneous breaking.
Keyword ：
3D index 3D index cable-stayed bridge cable-stayed bridge dynamic response dynamic response single tower single tower successive cable breaking successive cable breaking
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| GB/T 7714 | Chen, Yongjian , Wang, Song , Huang, Kai et al. Research on Dynamic Response of a Single-Tower Cable-Stayed Bridge with Successive Cable Breaks Based on a 3D Index [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (16) . |
| MLA | Chen, Yongjian et al. "Research on Dynamic Response of a Single-Tower Cable-Stayed Bridge with Successive Cable Breaks Based on a 3D Index" . | APPLIED SCIENCES-BASEL 13 . 16 (2023) . |
| APA | Chen, Yongjian , Wang, Song , Huang, Kai , Zhong, Jiwei , Cheng, Hui . Research on Dynamic Response of a Single-Tower Cable-Stayed Bridge with Successive Cable Breaks Based on a 3D Index . | APPLIED SCIENCES-BASEL , 2023 , 13 (16) . |
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Currently, the shear pin connection (SPC) is a structural measure in the double spherical seismic isolation bearing (DSSIB). However, there is no unified design methodology for the SPC. In addition, the existing shear constitutive model is the linear elastic model (LEM). Its drawback is the inability to capture the gap in the bearing and the plasticity, damage, as well as fracture behavior of the SPC. Therefore, based on the performance requirements for two-level seismic fortification, a detailed design methodology for the SPC is proposed. With the SPC in the Fuzhou Daoqingzhou Bridge as a prototype, the finite element model of the SPC is developed in order to discuss the applicability of the LEM for predicating the shear behavior of SPC. The results showed that the fracture displacement and absorbed energy obtained by the finite element analysis were significantly larger than those predicted by the LEM. Then, to compensate the drawback of the LEM, a tri-linear model (TLM) is proposed as the modified shear constitutive model of the SPC. Finally, the effects of TLM and LEM of the SPC on seismic performance of the isolated bridge were investigated. Obviously, the maximum displacement of the bearing calculated by the TLM is up to 1.38 times that calculated by the LEM. This suggests that the TLM has accurate predictions of mechanical property of the SPC.
Keyword ：
Design methodology Design methodology Double spherical seismic isolation bearing Double spherical seismic isolation bearing Modified shear constitutive model Modified shear constitutive model Seismic performance Seismic performance Shear pin connection Shear pin connection
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| GB/T 7714 | Yang, Mianyue , Qi, Ai , Zhang, Jiayu et al. Design methodology and modified shear constitutive model of the shear pin connection [J]. | STRUCTURES , 2023 , 47 : 1225-1240 . |
| MLA | Yang, Mianyue et al. "Design methodology and modified shear constitutive model of the shear pin connection" . | STRUCTURES 47 (2023) : 1225-1240 . |
| APA | Yang, Mianyue , Qi, Ai , Zhang, Jiayu , Chen, Yongjian . Design methodology and modified shear constitutive model of the shear pin connection . | STRUCTURES , 2023 , 47 , 1225-1240 . |
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In order to improve the seismic performance of long-span double deck steel truss continuous girder bridge, taking Dao Qing Chau Bridge in Fuzhou as an engineering background, the isolation scheme of friction pendulum bearing (FPB) and friction pendulum bearing combined with viscous dampers is applied to study seismic performance. A three-dimensional dynamic model of the bridge is established using SAP2000. Taking three artificial seismic waves as seismic excitation, the seismic response of the seismic structure is calculated by nonlinear time history integration, and is then compared with the seismic response of the seismic reduction and isolation structure. The results show that the friction pendulum bearing (FPB) scheme and combined seismic dissipation and isolation (CSDI) scheme show a good seismic dissipation and isolation effect and ensure the safety of the bridge structure. However, for whole-bridge isolation, friction pendulum bearing (FPB) will produce certain residual deformations and additional stress of the bearing under the conditions of temperature and external load. For the purpose of protecting the bearing, it is recommended to use the combined seismic dissipation and isolation (CSDI) scheme.
Keyword ：
combined seismic dissipation and isolation combined seismic dissipation and isolation continuous girder bridge continuous girder bridge double deck steel truss double deck steel truss friction pendulum bearing friction pendulum bearing viscous damper viscous damper
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| GB/T 7714 | Chen, Yongjian , Sun, Honglie , Feng, Zhenfa . Study on Seismic Isolation of Long Span Double Deck Steel Truss Continuous Girder Bridge [J]. | APPLIED SCIENCES-BASEL , 2022 , 12 (5) . |
| MLA | Chen, Yongjian et al. "Study on Seismic Isolation of Long Span Double Deck Steel Truss Continuous Girder Bridge" . | APPLIED SCIENCES-BASEL 12 . 5 (2022) . |
| APA | Chen, Yongjian , Sun, Honglie , Feng, Zhenfa . Study on Seismic Isolation of Long Span Double Deck Steel Truss Continuous Girder Bridge . | APPLIED SCIENCES-BASEL , 2022 , 12 (5) . |
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Based on the deflection theory and the characteristics of multi-tower self-anchored suspension bridges, considering the influence of longitudinal stiffness of main tower and bending effect of stiffening beam, the equilibrium differential equation and deformation coordination equation of multi-tower self-anchored suspension bridges are established. By "replacing beam" method, the practical calculation formula of internal force and deformation of multi-tower self-anchored suspension bridge was deduced, and the corresponding calculation program was implemented. The correctness of the analytical method and calculation program was verified by an example. The analytical method of static analysis of multi-tower self-anchored suspension bridges established in this paper can theoretically explain the mechanical characteristics of the structure, and the calculation method has a clear calculation flow. The internal force and deformation of the structure under live load can be approximately calculated only by inputting the main design parameters of the structure, which is suitable for structural design and parameter analysis of multi-tower self-anchored suspension bridge.
Keyword ：
deflection theory deflection theory multi-tower multi-tower self-anchored suspension bridge self-anchored suspension bridge static analysis static analysis substitution beam substitution beam
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| GB/T 7714 | Chen, Yong-jian , Wang, Song , Zhong, Ji-wei et al. Study on Static Analytical Method of Multi-Tower Self-Anchored Suspension Bridge [J]. | APPLIED SCIENCES-BASEL , 2022 , 12 (17) . |
| MLA | Chen, Yong-jian et al. "Study on Static Analytical Method of Multi-Tower Self-Anchored Suspension Bridge" . | APPLIED SCIENCES-BASEL 12 . 17 (2022) . |
| APA | Chen, Yong-jian , Wang, Song , Zhong, Ji-wei , Lian, Fei . Study on Static Analytical Method of Multi-Tower Self-Anchored Suspension Bridge . | APPLIED SCIENCES-BASEL , 2022 , 12 (17) . |
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双曲面球形减隔震（DSSI）支座是一种具有2个曲面摩擦副的球形滑动支座，能有效减小结构地震响应。在强地震区，竖向地震荷载将引起支座接触压应力的明显变化，而摩擦系数及恢复力与支座接触压应力相关，忽略这种相关性会明显影响支座的滞回性能，进而影响结构振动反应的分析结果。为此，文中针对摩擦材料为改性超高分子聚乙烯（MSM）的DSSI(MSM-DSSI)支座，首先开展不同接触压应力下干摩擦支座的压剪试验，确定摩擦系数及水平恢复力与支座接触压应力相关性。然后，根据试验结果，拟合得到干摩擦支座的摩擦系数关于变接触压应力的计算公式。最后，建立支座的有限元模型，验证有限元模型的正确性，进而分析变接触压应力的波动...
Keyword ：
DSSI支座 DSSI支座 压剪试验 压剪试验 变接触压应力 变接触压应力 拟合计算公式 拟合计算公式 改性超高分子聚乙烯(MSM) 改性超高分子聚乙烯(MSM) 有限元分析 有限元分析 滞回性能 滞回性能
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| GB/T 7714 | 祁皑 , 杨绵越 , 王立志 et al. 变接触压应力下MSM-DSSI支座滞回性能研究 [J]. | 地震工程与工程振动 , 2022 , 42 (02) : 32-41 . |
| MLA | 祁皑 et al. "变接触压应力下MSM-DSSI支座滞回性能研究" . | 地震工程与工程振动 42 . 02 (2022) : 32-41 . |
| APA | 祁皑 , 杨绵越 , 王立志 , 陈永健 . 变接触压应力下MSM-DSSI支座滞回性能研究 . | 地震工程与工程振动 , 2022 , 42 (02) , 32-41 . |
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本发明涉及一种墩柱竖向预应力筋加固结构，所述墩柱外周设置有加固区，加固区上顶部、底部均开设有环槽，环槽内设置有环形锚板，环槽外周固定安装有环形锚具，下端的环形锚具上圆周均布有若干螺纹孔，螺纹孔内安装有螺栓，螺栓的上端设置有下连接环，上端的环形锚具下表面圆周均布有若干上连接环，上连接环与对应的下连接环经预应力钢筋相连接，墩柱于加固区外周浇筑有普通凝土层，环形锚具、预应力钢筋位于膨胀混凝土层内，普通凝土层外包裹有FRP布层，FRP布层与普通凝土层之间浇筑有膨胀混凝土层，本结构施工方便，空间较小，减小了桥墩的抗震易损性，能起到良好的加固作用，该结构亦可为震后的桥墩进行加固。
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| GB/T 7714 | 王黎园 , 沈圣 , 颜学渊 et al. 墩柱竖向预应力筋加固结构 : CN202020431505.4[P]. | 2020/3/30 . |
| MLA | 王黎园 et al. "墩柱竖向预应力筋加固结构" : CN202020431505.4. | 2020/3/30 . |
| APA | 王黎园 , 沈圣 , 颜学渊 , 陈永健 , 叶时轮 . 墩柱竖向预应力筋加固结构 : CN202020431505.4. | 2020/3/30 . |
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To investigate the seismic performance of double-column bridge piers with headed reinforcement anchorage and conventional hooked bar anchorage, two reinforced concrete test models were fabricated at a scale of 1:5. Pseudostatic tests were conducted to investigate the effect of anchorage detailing on the hysteretic performance of the bridge pier models and to analyze the ductility, energy dissipation capacity, and residual displacement of the two models through comparison. By comparing two models, the following results were obtained: (1) The two models exhibit similar failure phenomena, however, the spalling and crushing of concrete under the ultimate load are more significant in the latter case than in the former case; (2) For the double-column pier with headed reinforcement anchorage, the ductility decreased slightly, whereas the bearing capacity was improved. Thus, headed reinforcement anchoring can be used in the joints of bridge piers to reduce the anchoring length and other advantages. © 2020 IEEE.
Keyword ：
Anchorages (foundations) Anchorages (foundations) Big data Big data Bridge piers Bridge piers Ductility Ductility Energy dissipation Energy dissipation Reinforced concrete Reinforced concrete Seismic waves Seismic waves Seismology Seismology Smart city Smart city
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| GB/T 7714 | Wang, Liyuan , Tang, Chaoyang , Chen, Yongjian et al. Influence of joint reinforcement anchorage detailing on the seismic performance of double-column bridge piers [C] . 2020 : 299-304 . |
| MLA | Wang, Liyuan et al. "Influence of joint reinforcement anchorage detailing on the seismic performance of double-column bridge piers" . (2020) : 299-304 . |
| APA | Wang, Liyuan , Tang, Chaoyang , Chen, Yongjian , Ma, Siyang , Zheng, Tianyu . Influence of joint reinforcement anchorage detailing on the seismic performance of double-column bridge piers . (2020) : 299-304 . |
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随着我国经济的发展,大跨度钢桁梁桥在我国铁路中得到广泛应用,我国很多学者对其进行了大量的研究并取得了一定的成果.普通的连续钢桁架桥静力分析经过多年的理论分析以及实际经验的研究,相关问题已然基本解决,但是对于公铁两用连续钢桁架桥静力分析的相关资料却不多见,特别对于公铁同面的连续钢桁架大桥,其静力特性研究相对较少.基于此,文章通过对模型试验的分析,充分掌握该主桁结构的静动力性能,而后在全面了解变高度双层钢桁结合梁这一创新结构形式的力学机理,为今后同类型的结构设计与施工提供理论依据.
Keyword ：
双层钢桁架桥梁 双层钢桁架桥梁 连续钢桁架桥 连续钢桁架桥 静力模拟试验 静力模拟试验
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| GB/T 7714 | 成浩嘉 , 陈永健 . 双层钢桁架梁桥静力模型试验研究 [J]. | 工程技术研究 , 2020 , 5 (13) : 30-31 . |
| MLA | 成浩嘉 et al. "双层钢桁架梁桥静力模型试验研究" . | 工程技术研究 5 . 13 (2020) : 30-31 . |
| APA | 成浩嘉 , 陈永健 . 双层钢桁架梁桥静力模型试验研究 . | 工程技术研究 , 2020 , 5 (13) , 30-31 . |
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针对目前预防预制空心板梁铰缝开裂的加固方法常存在施工复杂,造价较高的现象,提出了一种构造较为简单同时可为铰缝施工提供便捷的带锚固板连接钢筋的空心板铰缝构造.分别设计并制作了传统连接钢筋铰缝构造形式的空心板梁以及新型的带锚固板连接钢筋的铰缝构造形式的空心板梁模型.通过两者的静力试验,对比分析了两种模型的裂缝发展情况、钢筋应变、破坏形态和承载力等.试验结果表明:新型的带锚固板连接钢筋的铰缝构造形式可以延缓铰缝裂缝的出现,并且使空心板梁的极限承载力有所提高,从而改善铰缝的受力性能.
Keyword ：
空心板梁 空心板梁 连接钢筋 连接钢筋 铰缝 铰缝 锚固板 锚固板 静力试验 静力试验
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| GB/T 7714 | 王黎园 , 唐朝阳 , 陈永健 et al. 带锚固板连接钢筋的空心板梁铰缝试验研究 [J]. | 地震工程与工程振动 , 2020 , 40 (4) : 140-147 . |
| MLA | 王黎园 et al. "带锚固板连接钢筋的空心板梁铰缝试验研究" . | 地震工程与工程振动 40 . 4 (2020) : 140-147 . |
| APA | 王黎园 , 唐朝阳 , 陈永健 , 马思扬 . 带锚固板连接钢筋的空心板梁铰缝试验研究 . | 地震工程与工程振动 , 2020 , 40 (4) , 140-147 . |
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