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学者姓名：赵秋
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Abstract ：
High-strength materials and corresponding composite members are gradually accepted in the bridge industry to achieve the purposes of large span and lightweight. Three simply supported I-shaped steel-concrete composite beams were tested to investigate their flexural behavior when different combinations of materials were used, i.e., high-strength steel-ultra high performance concrete (HS-UHPC), high-strength steel-conventional strength concrete (HS-CC), and conventional strength steel-ultra high performance concrete (CS-UHPC). The test finds that the HS-UHPC composite beam has the highest flexural strength and reasonable plastic deformation ability as compared to the other two beams. A finite element (FE) model was also constructed and benchmarked. Subsequently, the model was utilized to conduct parametric studies, aimed at exploring in-depth the flexural behavior of steel-concrete composite beams. The results from the tests and FE analyses were employed to assess the suitability of existing design specifications (i.e., AISC 360-22, GB 50017-2017, and Eurocode 4) in estimating the flexural strength of HS-UHPC composite beams. The evaluations indicated that GB 50017-2017 can reasonably estimate the flexural strength of HS-UHPC composite beams. This research provides valuable insights into the design and construction of HS-UHPC composite beams in bridges.
Keyword ：
Composite beam Composite beam Design Design Flexural behavior Flexural behavior High strength steel High strength steel UHPC UHPC
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| GB/T 7714 | Lai, Zhichao , Yao, Pengyu , Yang, Xiaoqiang et al. Flexural behavior and design of high-strength I-shaped steel-UHPC composite beams [J]. | ADVANCES IN STRUCTURAL ENGINEERING , 2025 . |
| MLA | Lai, Zhichao et al. "Flexural behavior and design of high-strength I-shaped steel-UHPC composite beams" . | ADVANCES IN STRUCTURAL ENGINEERING (2025) . |
| APA | Lai, Zhichao , Yao, Pengyu , Yang, Xiaoqiang , Li, Shihui , Zhao, Qiu . Flexural behavior and design of high-strength I-shaped steel-UHPC composite beams . | ADVANCES IN STRUCTURAL ENGINEERING , 2025 . |
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为建立适用于多晶金属钢疲劳裂纹萌生与短裂纹扩展的数值分析方法,基于Roe-Siegmund循环内聚力本构及Voronoi图法生成具有疲劳累计损伤特性的微观晶粒组织模型,同时考虑晶粒微观层面的力学特性,赋予各晶粒随机局部坐标系及各向异性线弹性常数,最后研究了气孔、夹杂等微观缺陷对裂纹萌生路径及寿命的影响.结果表明:上述方法在裂纹萌生路径上符合实际情况,存在穿晶及沿晶两种断裂模式并以后者为主,能够获取符合正态分布的裂纹萌生寿命范围值,并与文献试验结果相吻合;气孔及夹杂附件萌生出裂纹并与主裂纹汇合,影响裂纹萌生路径并改变裂纹萌生寿命.
Keyword ：
Cohesive单元 Cohesive单元 Voronoi图法 Voronoi图法 循环内聚力模型 循环内聚力模型 微观缺陷 微观缺陷 金属疲劳断裂 金属疲劳断裂
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| GB/T 7714 | 赵秋 , 唐琨 , 吴维青 et al. 疲劳裂纹萌生与短裂纹扩展仿真方法 [J]. | 机械科学与技术 , 2025 , 44 (2) : 361-372 . |
| MLA | 赵秋 et al. "疲劳裂纹萌生与短裂纹扩展仿真方法" . | 机械科学与技术 44 . 2 (2025) : 361-372 . |
| APA | 赵秋 , 唐琨 , 吴维青 , 李英豪 , 邓俊逸 , 陈鹏 . 疲劳裂纹萌生与短裂纹扩展仿真方法 . | 机械科学与技术 , 2025 , 44 (2) , 361-372 . |
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为了解波形钢腹板-平钢底板组合梁在偏载作用下的扭转畸变效应,对其应力偏载系数进行研究.对1片按相似比1∶5缩尺的三跨变截面连续波形钢腹板-平钢底板组合梁进行静力模型试验和有限元分析,计算其在偏载作用下的顶(底)板翘曲正应力、腹板扭转剪应力以及正应力偏载系数和腹板剪应力偏载系数,并与现有偏载系数计算方法的计算结果进行对比.结果表明:钢底板翘曲正应力相对混凝土顶板更加明显,腹板剪应力沿截面高度变化较小,中跨跨中设置横隔板能有效限制组合梁的畸变变形;取偏载系数试验值与有限元值中的大者作为偏载系数建议值,建议中支点负弯矩区截面、跨中截面和1/4跨截面正应力偏载系数分别不小于1.18、1.11和1.15,中支点负弯矩区截面、跨中截面和1/4跨截面腹板剪应力偏载系数分别不小于1.66、1.35和1.43;经验系数法对正应力偏载系数比较适用,对剪应力偏载系数不适用,偏心压力法计算过于保守,实际设计应用并不经济,修正偏心压力法对正应力与剪应力偏载系数均考虑不足.
Keyword ：
应力 应力 应力偏载系数 应力偏载系数 有限元法 有限元法 模型试验 模型试验 波形钢腹板-平钢底板组合梁 波形钢腹板-平钢底板组合梁
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| GB/T 7714 | 陈宏彬 , 黄光铃 , 陈宜言 et al. 变截面连续波形钢腹板-平钢底板组合梁桥应力偏载系数研究 [J]. | 世界桥梁 , 2025 , 53 (2) : 111-118 . |
| MLA | 陈宏彬 et al. "变截面连续波形钢腹板-平钢底板组合梁桥应力偏载系数研究" . | 世界桥梁 53 . 2 (2025) : 111-118 . |
| APA | 陈宏彬 , 黄光铃 , 陈宜言 , 解冰 , 赵秋 . 变截面连续波形钢腹板-平钢底板组合梁桥应力偏载系数研究 . | 世界桥梁 , 2025 , 53 (2) , 111-118 . |
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Composite box girders with corrugated steel webs (CBGCSWs) offer the advantages of light weight and non-cracking webs and therefore tend to develop into super-span bridges. However, the torsional behavior of the composite box girders under eccentric loading is more prominent, due to the smaller torsional stiffness. Studies on the torsional behavior of super-span CBGCSWs are limited. Therefore, three super-span specimens of CBGCSWs with different cross-sectional forms were designed, and both experimental and numerical studies were carried out in this paper. The performance of finite element analysis (FEA) models was verified by comparing the experimental results, which included the torque-twist curves, cracking modes of concrete slabs, and shear strains of concrete slabs and corrugated steel webs (CSWs). A parametric analysis was also conducted, and a method for calculating the torsional bearing capacity of composite box girders was established based on the three probable failure modes of super-span CBGCSWs. Results indicated that the torsional bearing capacity of the high-web and wide-cell specimens was better than that of the standard specimen. Global buckling of the standard and wide-cell specimens occurred at almost all wavelengths, whereas that of the high-web specimen was concentrated in the middle of the span. The failure modes of CBGCSWs were influenced by the concrete strength and reinforcement ratio. The calculation method can effectively predict the failure modes and ultimate torques of CBGCSWs. © 2024 Institution of Structural Engineers
Keyword ：
Corrugated steel webs Corrugated steel webs Different cross-sectional forms Different cross-sectional forms Failure modes Failure modes Finite element analysis Finite element analysis Torsional bearing capacity Torsional bearing capacity
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| GB/T 7714 | Zhang, H. , Chen, Y. , Pan, J. et al. Torsional behavior of super-span composite box girder with corrugated steel webs [J]. | Structures , 2024 , 68 . |
| MLA | Zhang, H. et al. "Torsional behavior of super-span composite box girder with corrugated steel webs" . | Structures 68 (2024) . |
| APA | Zhang, H. , Chen, Y. , Pan, J. , Dong, J. , Zhao, Q. . Torsional behavior of super-span composite box girder with corrugated steel webs . | Structures , 2024 , 68 . |
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This study investigated the flexural performance of corrugated top flange steel-concrete composite beams in the negative moment region by tests and numerical analysis. A total of three static loading tests were conducted, including two specimens with corrugated top flange and one specimen with normal top flange. Test parameters were the type of the top flange and the longitudinal reinforcement ratio. The failure mode, crack pattern, and capacity of the specimens were discussed. The results showed that the failure mode of all three specimens was flexural failure. The capacity and ductility increased using the corrugated top flange, and the improvement in crack resistance by the corrugated top flange was much greater than reinforcement ratio. A calculation method for flexural capacity was proposed according to the tests and analysis. The calculated flexural capacity was in good agreement with the test results with a relative error of less than 10 %. The test results were also used for calibrate numerical models for further parametric study. It was found that the flexural capacity increased with increasing corrugation angle or decreasing the corrugation height, while the effect of corrugation height was higher on the structural performance. Data availability: Data will be made available on request © 2024 Institution of Structural Engineers
Keyword ：
Composite beam Composite beam Corrugated top flange Corrugated top flange Failure mechanism Failure mechanism Flexural capacity Flexural capacity Negative moment Negative moment
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| GB/T 7714 | Zhao, Q. , Xiao, F. , Zhang, H. et al. Flexural performance of corrugated top flange steel-concrete composite beams under the negative moment region [J]. | Structures , 2024 , 67 . |
| MLA | Zhao, Q. et al. "Flexural performance of corrugated top flange steel-concrete composite beams under the negative moment region" . | Structures 67 (2024) . |
| APA | Zhao, Q. , Xiao, F. , Zhang, H. , Fang, X. , Wang, Y. , Yang, Y. . Flexural performance of corrugated top flange steel-concrete composite beams under the negative moment region . | Structures , 2024 , 67 . |
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Prestressed corrugated steel-concrete (PCSC) composite girders are often subjected to combined bending and torsion in practice, but the existing theoretical models have mainly focused on pure torsional behavior. Thus, this paper proposed a modified combined action softened truss model (MCA-STM) to predict the flexural-torsional coupling behavior and failure modes of PCSC composite girders. The equivalent loading and nonlinear equations were modified, and the convergence criteria of flexural and torsional failure were established, considering the structural characteristics of PCSC composite girders. A new optimized algorithm was employed to solve the MCA-STM, providing a more efficient and numerically stable solution procedure. A 3D finite element analysis (FEA) model of the PCSC composite girder was established, which was verified by comparing the available test results. A parametric study was carried out based on the verified FEA model to get more datasets with various parameters, and the results were compared to the proposed analytical model. The curves obtained by the FEA and MCA-STM are in good agreement, indicating that the proposed analytical model can predict the full flexural-torsional coupling behavior and failure modes of the PCSC composite girders. © 2024 Elsevier Ltd
Keyword ：
Combined action softened truss model Combined action softened truss model Corrugated steel-concrete composite girders Corrugated steel-concrete composite girders Failure modes Failure modes Flexural-torsional coupling behavior Flexural-torsional coupling behavior Optimized algorithm Optimized algorithm
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| GB/T 7714 | Zhang, H. , Zhao, Q. , Chen, Y. et al. Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders [J]. | Engineering Structures , 2024 , 319 . |
| MLA | Zhang, H. et al. "Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders" . | Engineering Structures 319 (2024) . |
| APA | Zhang, H. , Zhao, Q. , Chen, Y. , Fang, X. , Yang, Z. , Yang, X. . Analytical model for flexural-torsional coupling behavior of prestressed corrugated steel-concrete composite girders . | Engineering Structures , 2024 , 319 . |
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The torsional effect of prestressed corrugated steel-concrete composite girders (PCSCCG) is more prominent due to its low torsional stiffness, which is therefore crucial to be clarified for safe design. This paper proposed a theoretical model based on the combined actions softened-membrane model (CA-SMM) to predict the torsional response of PCSCCG. The equilibrium, compatibility and constitutive equations were established to consider the characteristics of corrugated steel webs (CSW) and prestressing effect, where a reasonable shear strain assumption was presented to determine the force behavior of concrete slabs and CSW, and the thickness of shear flow in concrete slabs was corrected. An optimized algorithm using the gradient descent method was established to improve the insufficiency and stability. Based on this, a simplified design method was proposed to rapidly evaluate the torque and twist of PCSCCG. Finally, the feasibility of the proposed model and simplified design method was verified by available tests. The superiority of the analytical model in predicting the full torsional performance of PCSCCG was proved, and the reasonability and simplicity of the simplified method in capturing the cracking, yield, and ultimate torques and twists were observed.
Keyword ：
Combined actions softened-membrane model Combined actions softened-membrane model Composite girder Composite girder Corrugated steel webs Corrugated steel webs Optimized algorithm Optimized algorithm Simplified design method Simplified design method
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| GB/T 7714 | Zhang, Hao , Zhao, Qiu , Chen, Yiyan et al. Analytical model and design method of corrugated steel-concrete composite girders under torsion [J]. | STRUCTURES , 2024 , 70 . |
| MLA | Zhang, Hao et al. "Analytical model and design method of corrugated steel-concrete composite girders under torsion" . | STRUCTURES 70 (2024) . |
| APA | Zhang, Hao , Zhao, Qiu , Chen, Yiyan , Fang, Xiaojun , Yang, Zhaohui , Yang, Xiaoqiang . Analytical model and design method of corrugated steel-concrete composite girders under torsion . | STRUCTURES , 2024 , 70 . |
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高强钢丝作为桥梁拉索的核心受力构件,极易受到疲劳荷载和表面腐蚀的损伤,影响拉索的正常使用.本文通过研究影响高强钢丝疲劳寿命S-N曲线的主要因素,给出拉索与高强钢丝的S-N曲线和疲劳强度极限,并采用FORTRAN编写可记录疲劳累积损伤量的代码,内置于有限元软件的用户子程序中进行模拟分析,探究高强钢丝的疲劳裂纹萌生与扩展过程及疲劳寿命.结果表明:高强钢丝的疲劳寿命受应力范围和强度等级的影响程度较大,其余参数的影响效果相对较小;高强钢丝的裂纹萌生寿命约占总寿命的85%～97%,裂纹萌生寿命占比随着应力范围的增大而减小,且在高应力范围作用下裂纹扩展速度显著加快,裂纹扩展寿命占比随之减小.
Keyword ：
S-N曲线 S-N曲线 桥梁拉索 桥梁拉索 疲劳寿命 疲劳寿命 疲劳裂纹萌生 疲劳裂纹萌生 裂纹扩展寿命 裂纹扩展寿命 裂纹萌生寿命 裂纹萌生寿命 高强钢丝 高强钢丝
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| GB/T 7714 | 钱师雄 , 林铭毅 , 赵秋 . 拉索高强钢丝疲劳寿命与疲劳裂纹萌生机理 [J]. | 铁道建筑 , 2024 , 64 (12) : 6-13 . |
| MLA | 钱师雄 et al. "拉索高强钢丝疲劳寿命与疲劳裂纹萌生机理" . | 铁道建筑 64 . 12 (2024) : 6-13 . |
| APA | 钱师雄 , 林铭毅 , 赵秋 . 拉索高强钢丝疲劳寿命与疲劳裂纹萌生机理 . | 铁道建筑 , 2024 , 64 (12) , 6-13 . |
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Based on the trial design of the actual continuous prestressed concrete jointless bridge structure，the new type of integral jointless bridge with arch structure behind abutment was proposed. The three-dimensional beam-truss calculation model and the solid finite element model of the new structure was established. The effect of the interaction between the pile foundation and the soil around the pile was considered，and the half bridge organic glass model test was designed according to the principle of similarity ratio to verify the correctness of the simulation method. The verified numerical model was used to establish the full bridge beam-truss model and the full bridge solid model for the arch structure behind the abutment，and the effect of rise-span ratio and pile length on the overall mechanical performance was analyzed. The analysis results show that：The displacement and stress values of the model test are 8% and 21% different from those of the beam-truss model，and -3% and 5.3% different from those of the solid model. With the increase of rise-span ratio，the horizontal constraint on the arch foot decreases，the vertical displacement of the arch crown decreases relatively，the axial force on the main beam decreases gradually，and the bending moment variation range also decreases slightly，the horizontal force generated by the temperature is more transmitted to the arch structure behind the abutment. With the reduction of the pile length，the vertical displacement of the arch crown decreases，the shear force at the pile top decreases relatively，the axial force on the main beam decreases gradually，and the range of bending moment changes slightly decreases. Considering the actual foundation conditions，the jointless bridges with shorter pile length and larger rise-span ratio has better overall mechanical performance. © 2024 Editorial Board of Jilin University. All rights reserved.
Keyword ：
Abutments (bridge) Abutments (bridge) Arch bridges Arch bridges Arches Arches Axial flow Axial flow Bending moments Bending moments Glass Glass Numerical methods Numerical methods Numerical models Numerical models Pile foundations Pile foundations Piles Piles Prestressed concrete Prestressed concrete Structural design Structural design Trusses Trusses
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| GB/T 7714 | Zhao, Qiu , Chen, Peng , Zhao, Yu-Wei et al. Overall mechanical performance of jointless bridges with arch structure behind abutment [J]. | Journal of Jilin University (Engineering and Technology Edition) , 2024 , 54 (4) : 1016-1027 . |
| MLA | Zhao, Qiu et al. "Overall mechanical performance of jointless bridges with arch structure behind abutment" . | Journal of Jilin University (Engineering and Technology Edition) 54 . 4 (2024) : 1016-1027 . |
| APA | Zhao, Qiu , Chen, Peng , Zhao, Yu-Wei , Yu, Ao . Overall mechanical performance of jointless bridges with arch structure behind abutment . | Journal of Jilin University (Engineering and Technology Edition) , 2024 , 54 (4) , 1016-1027 . |
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Abstract ：
Composite box girders with corrugated steel webs (CBGCSWs) offer the advantages of light weight and noncracking webs and therefore tend to develop into super-span bridges. However, the torsional behavior of the composite box girders under eccentric loading is more prominent, due to the smaller torsional stiffness. Studies on the torsional behavior of super-span CBGCSWs are limited. Therefore, three super-span specimens of CBGCSWs with different cross-sectional forms were designed, and both experimental and numerical studies were carried out in this paper. The performance of finite element analysis (FEA) models was verified by comparing the experimental results, which included the torque-twist curves, cracking modes of concrete slabs, and shear strains of concrete slabs and corrugated steel webs (CSWs). A parametric analysis was also conducted, and a method for calculating the torsional bearing capacity of composite box girders was established based on the three probable failure modes of super-span CBGCSWs. Results indicated that the torsional bearing capacity of the high-web and wide-cell specimens was better than that of the standard specimen. Global buckling of the standard and wide-cell specimens occurred at almost all wavelengths, whereas that of the high-web specimen was concentrated in the middle of the span. The failure modes of CBGCSWs were influenced by the concrete strength and reinforcement ratio. The calculation method can effectively predict the failure modes and ultimate torques of CBGCSWs.
Keyword ：
Corrugated steel webs Corrugated steel webs Different cross-sectional forms Different cross-sectional forms Failure modes Failure modes Finite element analysis Finite element analysis Torsional bearing capacity Torsional bearing capacity
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| GB/T 7714 | Zhang, Hao , Chen, Yiyan , Pan, Jianan et al. Torsional behavior of super-span composite box girder with corrugated steel webs [J]. | STRUCTURES , 2024 , 68 . |
| MLA | Zhang, Hao et al. "Torsional behavior of super-span composite box girder with corrugated steel webs" . | STRUCTURES 68 (2024) . |
| APA | Zhang, Hao , Chen, Yiyan , Pan, Jianan , Dong, Jucan , Zhao, Qiu . Torsional behavior of super-span composite box girder with corrugated steel webs . | STRUCTURES , 2024 , 68 . |
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