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学者姓名：许成顺
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Abstract ：
The Kahramanmaras earthquake sequence that occurred in Turkey on Feb. 6, 2023 caused significant casualties and economic losses, which may relate to its distinct characteristics. This paper establishes optimal intensity measures (IMs) and vector-valued fragility curves for subway station structures considering the Kahramanmaras motion record characteristics. The seismic records are analyzed in terms of time-history, response spectrum, and seismic IMs, and a numerical model of a subway station with two-story and three-span is developed considering the concrete damage and nonlinear behavior of soil. The optimal IMs are selected according to criteria of efficiency, practicality, proficiency and goodness of fit. Based on the optimal IMs, vector-valued fragility surfaces are developed, and the differences in damage probability between the vector-valued fragility curves and scalarvalued fragility curves are analyzed. The results indicate that the velocity time-histories of the 12 mainshock records exhibit pulse-like characteristics with large peak velocities and displacements along with high amplitudes of the response spectra at longer periods. The velocity-based IM, Vsi, is found to be most suitable for probabilistic seismic demand analysis under the Kahramanmaras earthquake, and along with PGA is utilized as elements for vector-valued IM. Finally, the scalar-valued fragility curves may underestimate or overestimate the failure probability, while vector-valued fragility curves can offer a more accurate failure probability for specific characteristics IMs.
Keyword ：
Optimal IMs Optimal IMs Kahramanmaras earthquake Kahramanmaras earthquake Vector -valued fragility Vector -valued fragility Subway station Subway station
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| GB/T 7714 | Guo, Zhike , Han, Junyan , El Naggar, M. Hesham et al. Vector-valued fragility analysis of subway station structures subjected to the Kahramanmaras earthquake [J]. | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 182 . |
| MLA | Guo, Zhike et al. "Vector-valued fragility analysis of subway station structures subjected to the Kahramanmaras earthquake" . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 182 (2024) . |
| APA | Guo, Zhike , Han, Junyan , El Naggar, M. Hesham , Bi, Yansong , Xu, Chengshun , Du, Xiuli . Vector-valued fragility analysis of subway station structures subjected to the Kahramanmaras earthquake . | SOIL DYNAMICS AND EARTHQUAKE ENGINEERING , 2024 , 182 . |
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Abstract ：
This study investigates the seismic response and failure mode of a pile-structure system in a liquefiable site by employing a numerical simulation model combined with the shaking-table results of a soil-pile-structure dynamic system. The pile and soil responses obtained from the numerical simulations agreed well with the experimental results. The slopes of the dynamic shear-stress-shear-strain hysteretic curves at different positions also exhibited a decreasing trend, indicating that the shear strength of the soil in all parts of the foundation decreased. The peak acceleration of the soil and pile was not clearly amplified in the saturated sand layer but appeared to be amplified in the top part. The maximum bending moments appeared in the middle and lower parts of the pile shaft; however, the shear forces at the corresponding positions were not large. It can be observed from the deformation mode of the pile-group foundation that a typical bending failure is caused by an excessive bending moment in the middle of the pile shaft if the link between the pile top and cap is articulated, and sufficient attention should be paid to the bending failure in the middle of the pile shaft.
Keyword ：
failure model failure model pile foundation pile foundation seismic responses seismic responses soil liquefaction soil liquefaction numerical simulation numerical simulation shaking-table experiment shaking-table experiment
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| GB/T 7714 | Dou, Pengfei , Liu, Hao , Xu, Chengshun et al. Numerical analysis on seismic response and failure mechanism of articulated pile-structure system in a liquefiable site from shaking-table experiments [J]. | FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING , 2024 , 18 (7) : 1117-1133 . |
| MLA | Dou, Pengfei et al. "Numerical analysis on seismic response and failure mechanism of articulated pile-structure system in a liquefiable site from shaking-table experiments" . | FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING 18 . 7 (2024) : 1117-1133 . |
| APA | Dou, Pengfei , Liu, Hao , Xu, Chengshun , Wang, Jinting , Sun, Yilong , Du, Xiuli . Numerical analysis on seismic response and failure mechanism of articulated pile-structure system in a liquefiable site from shaking-table experiments . | FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING , 2024 , 18 (7) , 1117-1133 . |
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Abstract ：
Pre-event interventions, such as retrofit of critical components, are effective strategies to improve the seismic performance and resilience of infrastructure systems. This paper proposes a damage scenario reduction method aims to reduce the computation burden within the seismic retrofit optimization for water distribution systems (WDSs) considering the uncertain damages of pipelines. The optimization framework consists of a multi-objective optimization model for WDS pipeline retrofit and a sequential optimization model for the reduction of uncertain damage scenarios. The multi-objective optimization model is established to minimize the retrofit cost and maximize the seismic performance of WDS. The sequential optimization model, namely weighted optimization-based probabilistic scenarios (OPS + W), was designed to mitigate the computational burden of the multi-objective optimization model, which arises from considering pipeline damage uncertainties through quasi-Monte Carlo (QMC) sampling that generates numerous damage scenarios. The OPS + W selects a few representative damage scenarios from numerous QMC scenarios, aiming to minimize the error of pipeline damage probabilities counted by the representative scenarios, where the error is weighted by the importance of pipeline. The effectiveness of OPS + W is verified through its application in seismic retrofit optimization of two WDS cases and compared with other scenario reduction methods. Application results reveal that the retrofit strategies derived from OPS + W have the highest similarity to those obtained from QMC scenarios while requiring only 3 %-10 % of the computation time compared to using QMC scenarios.
Keyword ：
Seismic retrofit Seismic retrofit Water distribution system Water distribution system Scenario reduction Scenario reduction Optimization model Optimization model
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| GB/T 7714 | Hou, Benwei , Yang, Chengxin , Wu, Shan et al. Seismic retrofit optimization of water distribution systems based on the reduction of uncertain damage scenarios [J]. | INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION , 2024 , 112 . |
| MLA | Hou, Benwei et al. "Seismic retrofit optimization of water distribution systems based on the reduction of uncertain damage scenarios" . | INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION 112 (2024) . |
| APA | Hou, Benwei , Yang, Chengxin , Wu, Shan , Miao, Huiquan , Xu, Chengshun . Seismic retrofit optimization of water distribution systems based on the reduction of uncertain damage scenarios . | INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION , 2024 , 112 . |
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Abstract ：
A series of undrained cyclic torsional shear tests were conducted to investigate the effect of cyclic loading frequency on the liquefaction characteristics of saturated sand using the hollow cylinder apparatus. The test results show that the dilative and contractive tendencies of various saturated sands are not only related to the physical properties of sand, but also affected by loading frequency. Under low-frequency loading, the saturated sand has a dilative behaviour, excess pore water pressure fluctuates after initial liquefaction and soil maintains the ability to resist liquefaction to some extent after the initial liquefaction. The liquefaction mode in terms of stress-strain relationship generally performs as the "cyclic mobility". However, under the high-frequency loading, the saturated sand has a contractive behaviour, excess pore water pressure generally keeps stable after the initial liquefaction. The liquefaction mode in terms of stress-strain relationship generally exhibits as "cyclic instability". The deformation caused by low-frequency loading is significantly larger compared with that caused by high-frequency loading. At higher loading frequencies, the phase transformation stress ratio increases with the increase of loading frequency, and gradually approaches the failure stress ratio.
Keyword ：
Cycle loading frequency Cycle loading frequency Phase transformation stress ratio Phase transformation stress ratio Dilative and contractive tendencies Dilative and contractive tendencies Excess pore water pressure Excess pore water pressure Sand liquefaction Sand liquefaction
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| GB/T 7714 | Xu, Chengshun , Yue, Chong , Du, Xiuli et al. Experimental study on the influence of cyclic loading frequency on liquefaction characteristics of saturated sand [J]. | GEOTECHNIQUE , 2024 . |
| MLA | Xu, Chengshun et al. "Experimental study on the influence of cyclic loading frequency on liquefaction characteristics of saturated sand" . | GEOTECHNIQUE (2024) . |
| APA | Xu, Chengshun , Yue, Chong , Du, Xiuli , Liang, Ke , Wang, Bing , Chen, Guoxing . Experimental study on the influence of cyclic loading frequency on liquefaction characteristics of saturated sand . | GEOTECHNIQUE , 2024 . |
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Abstract ：
When an underground structure passes through a liquefiable soil layer, the soil liquefaction may pose a significant threat to the structure. A centrifuge shaking table test was performed to research the seismic response of underground structures in liquefiable interlayer sites, and a valid numerical model was obtained through simulation model test. Finally, the calibrated numerical model was used to perform further research on the influence of various distribution characteristics of liquefiable interlayers on the seismic reaction of underground structures. The key findings are as follows. The structure faces the most unfavorable condition once a liquefiable layer is located in the middle of the underground structure. When a liquefiable layer exists in the middle of the structure, the seismic reactions of both the underground structure and model site will increase with the rise of the thickness of the liquefiable interlayer. The inter-story drift of the structure in the non-liquefiable site is much smaller than that in the liquefiable interlayer site. The inter-story drift of the structure is not only associated with the site displacement and the soil-structure stiffness ratio but also closely associated with the slippage of the soil-structure contact interface under the condition of large deformation of the site.
Keyword ：
liquefiable interlayer sites liquefiable interlayer sites underground structure underground structure seismic response seismic response validation of numerical model validation of numerical model centrifuge shaking table test centrifuge shaking table test
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| GB/T 7714 | Yan, Guanyu , Xu, Chengshun , Zhang, Zihong et al. Numerical analysis on seismic performance of underground structures in liquefiable interlayer sites from centrifuge shaking table test [J]. | EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION , 2024 , 23 (4) : 781-798 . |
| MLA | Yan, Guanyu et al. "Numerical analysis on seismic performance of underground structures in liquefiable interlayer sites from centrifuge shaking table test" . | EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION 23 . 4 (2024) : 781-798 . |
| APA | Yan, Guanyu , Xu, Chengshun , Zhang, Zihong , Du, Xiuli , Wang, Xuelai . Numerical analysis on seismic performance of underground structures in liquefiable interlayer sites from centrifuge shaking table test . | EARTHQUAKE ENGINEERING AND ENGINEERING VIBRATION , 2024 , 23 (4) , 781-798 . |
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Abstract ：
为了研究基于云图法与增量动力分析（IDA）方法的地下结构地震易损性对比分析，以两层双跨地铁车站结构为研究对象，基于ABAQUS/standard软件平台，建立了考虑土-结构相互作用的二维有限元模型。采用非线性时程动力分析方法，获取了结构在502条原始地震动记录（云图法）以及基于44条地震动调幅后（IDA方法）作用下的动力响应。以层间位移角为结构损伤指标，PGA为地震动强度指标，分别建立了基于云图法与IDA方法计算结果的地铁车站地下结构地震易损性曲线。结果表明：基于云图法与IDA方法所评估的地下结构震后功能失效概率基本相等，最大差异仅为7.5%。与云图法相比，得益于调幅的优势，基于IDA方法的地震易损性分析可以获取地下结构在任意地震动强度作用下的失效概率。上述成果可为基于性能的地下结构抗震设计分析方法提供科学参考依据。
Keyword ：
地铁车站 地铁车站 数值分析 数值分析 增量动力分析 增量动力分析 地下结构抗震 地下结构抗震 框架结构 框架结构 云图法 云图法 地震易损性 地震易损性
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| GB/T 7714 | 蒋家卫 , 王树旷 , 许成顺 et al. IDA与云图法在地下结构地震易损性分析的应用 [J]. | 哈尔滨工程大学学报 , 2023 , (09) : 1-8 . |
| MLA | 蒋家卫 et al. "IDA与云图法在地下结构地震易损性分析的应用" . | 哈尔滨工程大学学报 09 (2023) : 1-8 . |
| APA | 蒋家卫 , 王树旷 , 许成顺 , 杜修力 , 陈国兴 . IDA与云图法在地下结构地震易损性分析的应用 . | 哈尔滨工程大学学报 , 2023 , (09) , 1-8 . |
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Abstract ：
This paper investigates the seismic bridge-pile-soil system failure mechanisms due to liquefaction-induced lateral spreading. Two large-scale shaking table tests were performed on pile groups with and without bridges in sloped liquefiable soils overlain by soil crust. The systems were subjected to a weak earthquake signal (Tabas 0.05 g) and a strong earthquake signal (Tabas 0.3 g). Their responses were recorded in terms of excess pore pressure, acceleration, and displacement time histories. The piles seismic failure mode and mechanism are described based on the obtained results. In addition, the inertial and kinematic interaction effects on the piles' deflection were evaluated. The results demonstrated that the bridge had no significant effect on the seismic response of the pile-soil system under weak earthquakes. Meanwhile, the test model without a bridge experienced more significant soil lateral displacement, and the saturated sand exhibited dilatant behavior, and amplified the acceleration peak response during the strong earthquake. Moreover, the liquefaction-induced lateral spreading moved the vulnerable position of the pile group bridge system from the pier bottom to the pile head, which changed the failure mode of the pile head. The results also revealed that, compared with weak earthquake excitation, the kinematic effect was significantly enhanced, and the inertia effect was weakened during strong earthquakes. Moreover, the pile curvature during both weak and strong earthquakes was inversely proportional to the bridge inertial load.
Keyword ：
bridges bridges shaking table test shaking table test pile group pile group crust crust liquefaction liquefaction seismic failure mechanism seismic failure mechanism lateral spreading lateral spreading
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| GB/T 7714 | Jia, Kemin , Xu, Chengshun , El Naggar, M. Hesham et al. Inertial and kinematic interactions of bridge-pile group subjected to liquefaction induced lateral spreading: Large-scale shaking table experiments [J]. | EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS , 2023 , 52 (4) : 1267-1290 . |
| MLA | Jia, Kemin et al. "Inertial and kinematic interactions of bridge-pile group subjected to liquefaction induced lateral spreading: Large-scale shaking table experiments" . | EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS 52 . 4 (2023) : 1267-1290 . |
| APA | Jia, Kemin , Xu, Chengshun , El Naggar, M. Hesham , Dou, Pengfei , Pan, Rujiang , Song, Jia . Inertial and kinematic interactions of bridge-pile group subjected to liquefaction induced lateral spreading: Large-scale shaking table experiments . | EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS , 2023 , 52 (4) , 1267-1290 . |
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Abstract ：
The development and application of prefabricated assembly technology has become an important measure to achieve industrial optimization and upgrading and sustainable development of construction engineering. The application of prefabricated assembly technology in underground engineering is in its infancy, and the seismic research on prefabricated underground structures is scarce. Therefore, this paper establishes refined finite element models (FEMs) of prefabricated and cast-in-place underground structures based on an actual project of a subway station. The developed FEMs are used to conduct a series of seismic time-history analyses considering soil-structure interaction to compare the responses of a prefabricated underground structure with rigid splicing joints or non-rigid splicing joints with that of a cast-in-place underground structure of the same structural form. In addition, the influence of the splicing properties of different parts on the inter-story displacement and internal forces of the prefabricated underground structure are systematically investigated. Tt was found that the inter -story displacement and component deformation for prefabricated underground structures with rigid joints are basically the same as those of the cast-in-place underground structure; however, both the internal force and damage at the bottom of center column decrease slightly. On the other hand, prefabricated underground structures with non-rigid splicing joints experience a slight increase (less than5%) in inter-story displacement, but more obvious mid-span deflection of the laminated slab. However, the internal force response and damage degree of their center column are significantly reduced compared to cast-in-place structures. It was also revealed that the bonding strength of new-old concrete interface of the horizontal laminated components is the main factor that reduces the lateral stiffness and causes redistribution of the prefabricated underground structures' internal forces.
Keyword ：
Subway station Subway station Splicing interface Splicing interface Numerical model Numerical model Seismic response Seismic response Cast-in-place underground structure Cast-in-place underground structure Prefabricated underground structure Prefabricated underground structure
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| GB/T 7714 | Chen, Jinnan , Xu, Chengshun , El Naggar, Hesham M. et al. Seismic response analysis of rectangular prefabricated subway station structure [J]. | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2023 , 131 . |
| MLA | Chen, Jinnan et al. "Seismic response analysis of rectangular prefabricated subway station structure" . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 131 (2023) . |
| APA | Chen, Jinnan , Xu, Chengshun , El Naggar, Hesham M. , Du, Xiuli . Seismic response analysis of rectangular prefabricated subway station structure . | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY , 2023 , 131 . |
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Abstract ：
本文旨在研究浅埋地铁车站地下框架结构概率地震需求分析中的最优地震动强度指标.基于ABAQUS/Standard软件平台,建立地下框架结构土-结构相互作用分析的二维模型,采用非线性动力时程分析方法获得了3种断面的地铁车站框架结构在22条远场地震动记录激励下的非线性地震反应数据.以峰值层间位移角作为结构损伤参数,基于效率性、实用性、有益性及充分性对15种地震动强度指标进行了检验分析.结果表明:PGA最适合作为地震动强度指标进行浅埋地铁车站地下框架结构的概率地震需求分析,速度反应谱与PGV可作为备选强度指标;PGD、位移均方根、速度平方积分,与位移平方积分等强度指标均未能满足充分性检验,不适用于浅埋地铁车站地下框架结构概率地震需求分析.上述结论可对指导浅埋地下结构基于性能的抗震设计、发展和完善现有地下结构概率地震需求模型地震动强度指标的确定方法提供有价值的参考.
Keyword ：
地下结构 地下结构 地震动强度指标 地震动强度指标 地铁车站 地铁车站 动力时程分析 动力时程分析
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| GB/T 7714 | 蒋家卫 , 许成顺 , 杜修力 et al. 浅埋地铁车站地下框架结构抗震设计的最优地震动强度指标 [J]. | 岩土工程学报 , 2023 , 45 (2) : 318-326 . |
| MLA | 蒋家卫 et al. "浅埋地铁车站地下框架结构抗震设计的最优地震动强度指标" . | 岩土工程学报 45 . 2 (2023) : 318-326 . |
| APA | 蒋家卫 , 许成顺 , 杜修力 , 陈国兴 , 许紫刚 . 浅埋地铁车站地下框架结构抗震设计的最优地震动强度指标 . | 岩土工程学报 , 2023 , 45 (2) , 318-326 . |
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Abstract ：
海上风机结构体系长期经受波浪、风等水平循环荷载的作用,从而引起地基刚度变化,海上风机结构体系属于动力敏感型结构,预测其自振频率的长期变化具有非常重要的工程意义.基于动力运动方程,考虑了桩土相互作用,通过嵌入地基刚度衰减模型考虑长期循环荷载引起的地基刚度变化,建立了单桩式海上风机结构自振频率的简化计算方法,利用实际工程和数值模拟验证了方法的可行性.最后通过开展参数分析,探讨长期循环荷载大小、加载次数对海上风机结构自振频率的影响规律;结果表明,循环荷载的增大、加载次数的增加会导致海上风机结构体系自振频率较小,风机结构体系的自振频率应偏移1P;该方法可以评估长期循环荷载下单桩式海上风机结构自振频率的变化,为近海风机结构自振频率的设计提供参考.
Keyword ：
海上风机 海上风机 单桩基础 单桩基础 自振频率 自振频率 长期循环荷载 长期循环荷载
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| GB/T 7714 | 孙毅龙 , 许成顺 , 席仁强 et al. 长期水平荷载对单桩式海上风机结构自振频率的影响分析 [J]. | 振动与冲击 , 2023 , 42 (2) : 108-115,138 . |
| MLA | 孙毅龙 et al. "长期水平荷载对单桩式海上风机结构自振频率的影响分析" . | 振动与冲击 42 . 2 (2023) : 108-115,138 . |
| APA | 孙毅龙 , 许成顺 , 席仁强 , 杜修力 , 豆鹏飞 . 长期水平荷载对单桩式海上风机结构自振频率的影响分析 . | 振动与冲击 , 2023 , 42 (2) , 108-115,138 . |
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