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Seismic analyses of conventional and improved marginal wharves

机译：常规和改进边缘码头的地震分析

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Marginal wharves are key components in providing functionality of port facilities. Ports are central components of the US economy. Earthquake damage to a port can disrupt the economic stability. Therefore, port facilities must be able to quickly return to full operation shortly after a seismic event. Prior studies have shown that integrity of marginal wharves may be compromised by excessive soil movement and structural damage. The latter is often localized at pile-to-wharf connections and in the pile body buried within the soil. Recent research has resulted in an improved connection design that mitigates damage. This study was undertaken to evaluate the full seismic performance of marginal wharves including both conventional and damage-resisting connections. A series of finite element models of a representative pile-supported wharf facility were created. The models varied in their moment-resisting pile-to-wharf connections. A total-stress analysis approach was used to capture the soil response along with p-y, t-z, and Q-z soil-structure interaction springs. Validated connection interface elements were integrated with non-linear frame elements to simulate the marginal wharf structure and substructure. Non-linear static pushover and dynamic time history analyses, for three different hazard levels, were performed. The results of the numerical simulations were used to assess the performance of the marginal wharf including estimates of crane damage and port downtime.
机译：边缘码头是提供港口设施功能的关键组成部分。港口是美国经济的核心组成部分。地震对港口的破坏会破坏经济稳定性。因此，地震事件发生后不久，港口设施必须能够迅速恢复到全面运转。先前的研究表明，过度的土壤运动和结构破坏可能会损害边缘码头的完整性。后者通常位于桩-码头连接处以及埋在土壤中的桩体内。最近的研究导致改进的连接设计可以减轻损坏。进行这项研究是为了评估边缘码头的完整抗震性能，包括常规连接和抗损伤连接。创建了具有代表性的桩基码头设施的一系列有限元模型。这些模型在抗力矩桩到码头连接方面各不相同。使用总应力分析方法来捕获土壤响应以及p-y，t-z和Q-z土壤-结构相互作用弹簧。将经过验证的连接界面元素与非线性框架元素集成在一起，以模拟边缘码头的结构和子结构。针对三种不同的危害水平，进行了非线性静态推覆和动态时程分析。数值模拟的结果用于评估边缘码头的性能，包括起重机损坏和港口停工时间的估计。

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