Data supporting the paper: "Time-dependent failure probability analysis of high-piled wharves under combined vessel berthing impact load and corrosion"

Based on the recommended analytical approach for structural performance degradation considering the full process of reinforcement corrosion under chloride ions and stress, and by integrating an engineering prototype, the structural performance degradation patterns of high-piled wharves subjected to asynchronous chloride corrosion are obtained. These patterns include the degradation laws of RC mechanical properties, such as reinforcement corrosion ratio, reinforcement–concrete bond strength, reinforcement strength, and concrete strength, as well as the degradation laws of flexural stiffness for various components of high-piled wharf (detailed in Data 1). Secondly, considering the asynchronous corrosion and synergistic interaction among components such as beams, panels, and piles, a 3D finite element model of the overall high-piled wharf structure incorporating Drucker–Prager (D-P) soil–structure interaction, is developed based on the engineering prototype. Then the deterioration states in overall structural lateral deformation behavior are identified under the combined effects of asynchronous chloride corrosion and vessel berthing impact loads. In this finite element model, the reduction technique of elastic modulus is employed to equivalently reflect the deterioration of flexural stiffness in different components by decreasing the moduli of elasticity for both concrete and longitudinal bars. Moreover, the modeling process incorporates the deterioration of mechanical behavior such as the strength in tension and compression of the constituent materials, namely the reinforcing steel and concrete, along with the decrease in reinforcement ratio caused by corrosion-induced loss in both longitudinal and stirrup bars. Commencing from the start of the wharf’s service life, a representative analysis is conducted at five-year intervals, with additional time points corresponding to the corrosion initiation time ti and the structural failure time te for each component. In total, 21 degradation scenarios are established. Based on the validated finite element model, nonlinear analysis is conducted to derive the degradation patterns of lateral deformation performance including the absolute and self-lateral displacements (relative lateral displacements) for the high-piled wharf components under different vessel berthing impact loads at various service times, thereby determining the critical components that govern the overall structural system's failure in lateral bearing deformation under the combined effects of asynchronous chloride corrosion and vessel berthing impact loads. Moreover, the time-dependent deterioration of the ultimate flexural capacity of the overall wharf structure under these conditions are obtained (detailed in Data 2). Further considering the wharf as a series system, a time-dependent reliability framework is developed. By accounting for the time-dependent nature of both the vessel berthing impact load and the overall structural resistance, a failure model is established that reflects the deterioration of overall structural performance. Then, based on the deformation and bending limit state functions, and utilizing the PDS module of ANSYS, a combined MATLAB-APDL program is developed employing the Monte Carlo sampling technique. Finally, this framework is utilized to analyze the time-dependent pattern for the overall wharf structural failure probability at various stiffness deterioration states, under the combined effects of asynchronous chloride corrosion and vessel berthing impact loads (detailed in Data 3).

本研究基于考虑氯离子与应力共同作用下钢筋腐蚀全过程的结构性能退化推荐分析方法，结合工程原型，得到了异步氯离子腐蚀作用下高桩码头的结构性能退化规律。上述规律涵盖钢筋混凝土（Reinforced Concrete, RC）力学性能退化规律，包括钢筋腐蚀率、钢筋-混凝土粘结强度、钢筋强度、混凝土强度的退化规律，以及高桩码头各构件的抗弯刚度退化规律（详见数据集Data 1）。其次，考虑异步腐蚀及梁、板、桩等构件间的协同作用，基于前述工程原型，建立了考虑德鲁克-普拉格（Drucker–Prager, D-P）土-结构相互作用的高桩码头整体结构三维有限元模型，进而识别异步氯离子腐蚀与船舶靠泊冲击荷载共同作用下整体结构的侧向变形性能退化状态。在该有限元模型中，通过降低混凝土与纵向钢筋的弹性模量，采用弹性模量折减技术等效反映不同构件的抗弯刚度退化。此外，建模过程还考虑了组成材料（钢筋与混凝土）的拉压强度等力学性能退化，以及纵向钢筋与箍筋因腐蚀锈蚀导致的配筋率降低。从码头服役初期开始，以5年为间隔开展代表性分析，并增设各构件的腐蚀起始时间$t_i$与结构失效时间$t_e$作为分析时点，共计构建21种退化工况。基于验证后的有限元模型，开展非线性分析，得到不同服役时刻下、不同船舶靠泊冲击荷载作用时，高桩码头构件的侧向变形性能退化规律，包括绝对侧向位移与自身侧向位移（相对侧向位移），进而确定异步氯离子腐蚀与船舶靠泊冲击荷载共同作用下，控制整体结构体系侧向承载变形失效的关键构件。同时，得到该工况下整体码头结构的抗弯极限承载力随时间的退化规律（详见数据集Data 2）。进一步将码头视为串联系统，构建时变可靠性分析框架；考虑船舶靠泊冲击荷载与整体结构抗力的时变特性，建立反映整体结构性能退化的失效模型。随后，基于变形与抗弯极限状态函数，结合ANSYS的概率设计系统（Probabilistic Design System, PDS）模块，采用蒙特卡洛（Monte Carlo）抽样技术，开发MATLAB与APDL联合程序。最终利用该框架，分析异步氯离子腐蚀与船舶靠泊冲击荷载共同作用下，不同刚度退化状态时整体码头结构失效概率的时变规律（详见数据集Data 3）。