Quasi-Static Cyclic Testing of Elevated RC Pile-Cap Foundation for Bridge Structures
Quasi-Static Cyclic Testing of Elevated RC Pile-Cap Foundation for Bridge Structures
复制标题
DOI：
10.1061/(asce)be.1943-5592.0000797
复制
发表时间：
2016-02
影响因子：
3.6
通讯作者：
Xiaowei Wang;A. Ye;He Zhongying;Shang Yu
中科院分区：
文献类型：
--
作者：
Xiaowei Wang;A. Ye;He Zhongying;Shang Yu
摘要目前桩基抗震设计中，弹性设计原则是一种过于保守的策略。为此，通过水平荷载循环试验，研究了钢筋混凝土高桩承台基础的地震破坏机理和延性性能。两个六桩试件具有不同的地上高度，并嵌入到一个单一的无粘性土层。给出了群桩的滞回特性和实测损伤情况，以及相应的土压力和桩身曲率响应。根据试验结果，确定了桩身塑性铰的出现顺序和位置。根据试验数据和数值分析结果确定了群桩的极限状态。试验结果表明，两个样本的韧性弯曲破坏模式。塑性铰首先在外部桩的顶部被检测到，然后在地下4-6倍的截面宽度的深度。一种排水管道
AbstractIn current practices, the elastic design principle for the seismic design of pile foundations is an overly conservative strategy. In this regard, cyclic lateral loading tests were conducted to investigate the seismic failure mechanism and ductile behaviors of elevated RC pile-cap foundations. Two six-pile specimens with different aboveground heights were constructed and embedded in a single layer of cohesionless soil. Hysteretic characteristics and observed damages of the pile groups were presented, together with the corresponding soil pressure and pile curvature responses. From the test results, the sequence and positions of the pile plastic hinges were established. Ultimate limit states of the pile groups were determined according to test data, as well as numerical analysis results. Test results revealed a ductile flexural failure mode for both specimens. Plastic hinges were detected first at the top of outer piles, then underground at a depth of 4–6 times the section width. A displacement ducti...