基于跨中竖向和环向角度分析薄壁钢护筒-钢筋混凝土组合构件单向偏心受压问题

为加快我国内河水运的发展,在实际工程中,由于制造的偏差、轴心线的偏离、联系结构协同受力,以及上部堆载不均匀等因素使得绝大多数的组合构件处于偏心受压状态。目前对应用于码头结构的薄壁钢护筒-钢筋混凝土组合结构(RCFST)偏心受压承载性能的研究还未下定论。鉴于此,本文通过跨中竖向环向应变和侧向挠度的角度对薄壁钢护筒-钢筋混凝土联合受力构件单向偏心受压问题进行试验研究。结果表明：钢护筒壁厚和受竖向荷载偏心率的不同,对桩极限承载能力具有直接影响,对柱顶跨中和柱底的跨中应力应变的改变较为明显。因此,进行钢护筒-钢筋混凝土组合构件偏心受压承载性能研究运用于码头设计中具有较高的工程实践意义和科学价值。

Analysis of Single Side Eccentrically Compressed of Thin-Walled Reinforced Concrete-Filled Steel Tube Composite Structure Based on Vertical and Circumferential of Midspan

In order to speed up the development of inland waterway transportation in China, most of the composite members are under eccentric compression due to the deviation of manufacture, deviation of axis line, cooperative force of the connection structure, and uneven loading of the upper part. At present, the research of (RCFST) eccentricity bearing capacity of thin-walled steel retaining and reinforced concrete composite structure used in wharf structure has not been concluded. In view of this, the unidirectional eccentric compression of thin-walled steel-tube reinforced concrete members was studied by the vertical and circumferential of midspan and lateral deflection experiment. The results show that the difference of heart rate and wall thickness have a direct effect on the ultimate bearing capacity of pile, and the change of stress and strain in the middle span of column top span and column bottom is more obvious. It is concluded that it is of great practical significance and scientific value to study the eccentricity compression bearing capacity of steel bulk-reinforced concrete composite members in wharf design.