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Proposed design chart of mechanical joints on steel-PHC composite piles

机译:提议的钢-PHC复合桩机械接头设计图

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A fundamental study of a mechanical joint in a steel-PHC composite pile subjected to combined loads was done using three-point bending tests and 3D finite element analyses. The three-point bending tests were conducted to evaluate load-deformation response, strain distribution on the pile, ultimate bending moment and failure mode of the mechanical joint on steel-PHC composite piles. In addition, 3D finite element analysis for the mechanical joint was performed and then, the stress distributions and the maximum load resistances of each parts of the joint were estimated by comparing the calculated stresses to the yielding stresses of the joint materials. The 3D numerical methodology in the present study represents a realistic mechanism of mechanical joints. Through detailed numerical analysis, it is found that the behaviour of mechanical joint of composite piles shows safe side under working load. Based on these results, the design chart for steel-PHC piles has been proposed to be convenient for preliminary design stage which can be used to evaluate the safety of mechanical joints.
机译:使用三点弯曲试验和3D有限元分析对钢-PHC复合桩中承受联合荷载的机械接头进行了基础研究。进行了三点弯曲试验,以评估钢-PHC复合桩上的荷载-变形响应,桩上的应变分布,极限弯矩和机械接头的破坏模式。此外,对机械接头进行了3D有限元分析,然后,通过将计算所得的应力与接头材料的屈服应力进行比较,估算了接头各部分的应力分布和最大载荷阻力。本研究中的3D数值方法代表了机械接头的现实机制。通过详细的数值分析,发现复合桩的机械节理在工作荷载下表现出安全的一面。基于这些结果,提出了一种钢-PHC桩的设计图,以便于初步设计阶段,可用于评估机械接头的安全性。

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