Experimental Studies of Rock Socketed Piles with Different Transverse Reinforcement Ratios
Experimental Studies of Rock Socketed Piles with Different Transverse Reinforcement Ratios
复制标题
不同横向配筋率嵌岩桩试验研究
DOI：
10.1061/9780784483404.001
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Lemnitzer, Anne
中科院分区：
文献类型：
--
作者：
Farrag, Rabie;Turner, Benjamin;Cox, Carter;Lemnitzer, Anne
嵌岩桩常用于将大跨度桥梁和高层建筑的大荷载传递到坚固的地基中。桩设计是根据规范建议和数值预测的内部剪力和弯矩大小得出的。很少有实验数据来验证嵌岩桩的规范规定和设计假设。为了帮助缓解缺乏大规模的测试数据，横向响应行为的三个18英寸。直径，16英尺长，钢筋混凝土桩进行了评估。将桩试件嵌入一层松散的砂土中，并通过高强度混凝土模拟固定在“岩窝”中。施工顺序模拟了钻孔桩的土-桩界面应力状态。桩体配筋变化，以满足（1）规范要求、（2）SSI分析预测和（3）结构要求的内部反作用力。对桩试件进行测试，以完成结构破坏，然后进行开挖。内部仪器沿着裂纹模式建议剪切-弯曲组合失效，但不支持理论预测的边界处剪切力和弯矩的放大和缩小。
Piles socketed into rock are frequently utilized to carry large loads from long-span bridges and high-rise buildings into solid ground. The pile design is derived from internal shear and moment magnitudes following code recommendation and numerical predictions. Little experimental data exist to validate code prescriptions and design assumptions for piles embedded in rock. To help alleviate the lack of large-scale test data, the lateral response behavior of three 18-in. diameter, 16 ft long, reinforced concrete piles was evaluated. The pile specimens were embedded in a layer of loose sand and fixed in “rock-sockets,” simulated through high strength concrete. The construction sequence simulated soil-pile interface stress conditions of drilled shafts. The pile reinforcement varied to satisfy the internal reaction forces per (1) code requirements, (2) analytical SSI predictions, and (3) structural demands only. The pile specimens were tested to complete structural failure and excavated thereafter. Internal instrumentation along with crack patterns suggested a combined shear-flexural failure, but do not support the theoretically predicted amplification and de-amplification of shear and moment forces at the boundary, respectively.
影响因子：
3.6
作者：
Fengju Guo;B. Lehane
通讯作者：
Fengju Guo;B. Lehane