The use of rolled steel sections is typical in offshore topside, while recent developments are focused on coped sections to accommodate service lines and fire hydrants. Coped beams are better alternatives without compromising the load-bearing capacity and shear strength. On the topside, the use of coped beams is helpful in creating a more orderly, safe, and undisturbed workspace for laying service mains and fire hydrants; otherwise, they pose a general threat to the topside functional safety. Coped beam replaces the stack of service mains without compromising on the strength requirements of the web. Enhanced safety and improved aesthetics of the topside design are additional advantages. The present study investigates a coped beam with functionally graded material (FGM) to accommodate the services mains in a safer mode without losing its strength; corrosion resistance is also investigated as an additional requirement for any leak occurring from the mains. A coped beam of FGM and X52 steel is investigated under conventional loads and compared for their strength and serviceability requirements. Parameters such as cope length and depth are varied as per the design requirements. FGM coped beams showed higher load-carrying capacity even under the larger coped sections. Under deeper web sections, the cope depth and length have a significant impact on the buckling and load-carrying capacity. For all the chosen coped sections, FGM beams registered a significant reduction in buckling stress compared to X52 steel beams in the coped region, indicating the former is a better candidate for such applications.

海上上部结构通常使用轧制钢型材，而最近的开发重点是容纳服务管线和消防栓的顶部型材。顶部梁是更好的选择，不会影响承载能力和剪切强度。在上部，使用内顶梁有助于创造一个更加有序、安全和不受干扰的工作空间，用于铺设供水总管和消防栓；否则，它们会对上部结构的功能安全构成普遍威胁。顶部梁取代了成排的服务干线，而不影响腹板的强度要求。额外的优势还包括增强安全性和改善上部设计的美观性。本研究研究了采用功能梯度材料（FGM）的顶部梁，以更安全的方式容纳服务干线，同时又不损失其强度；作为针对主电源发生的任何泄漏的附加要求，还对耐腐蚀性进行了研究。在常规载荷下研究了 FGM 和 X52 钢的内盖梁，并比较了它们的强度和适用性要求。上长度和深度等参数根据设计要求而变化。即使在较大的顶部截面下，FGM 顶部梁也显示出更高的承载能力。在较深的腹板截面下，上模深度和长度对屈曲和承载能力有显着影响。对于所有选定的内冠部分，与内冠区域的 X52 钢梁相比，FGM 梁的屈曲应力显着降低，表明前者更适合此类应用。