Study of seismic behavior of PHC piles with partial normal-strength deformed bars  

作　　者：Zhang Xizhi Zhang Shaohua Xu Shengbo Niu Sixin 

机构地区：[1]Architectural Design&Research Institute of Tianjin University,Tianjin 300072,China [2]Key Laboratory of Coast Civil Structure Safety,Ministry of Education,Tianjin University,Tianjin 300072,China [3]School of Civil Engineering,Tianjin University,Tianjin 300072,China [4]Shandong Tong Yuan Design Group Co.,Ltd.,Jinan 250101,China

出　　处：《Earthquake Engineering and Engineering Vibration》2020年第2期307-320,共14页地震工程与工程振动（英文刊）

基　　金：National Natural Science Foundation of China under Grant No.51578369;the Tianjin Science and Technology Major Project under Grant No.17ZXCXSF00080。

摘　　要：Nine PHC piles with partial normal-strength deformed bars were prepared in present study,and cyclic loading tests were implemented to evaluate these piles’seismic performance.The influence of the axial compression ratio and the amount of normal-strength deformed bars on failure modes,crack patterns,strength,stiffness,and ductility were examined.The test findings indicate that the change of axial compression ratio has a noticeable influence on the failure mode of PHC piles.A larger axial compression ratio results in a higher cracking bending resistance,ultimate bending resistance,and initial stiffness,but the propagation heights of flexural cracks decrease as the axial compression ratio increases.Furthermore,increasing the amount of normal-strength deformed bars causes a slight decrease in ductility.Finally,a calculation formula was proposed to predict the flexural capacity of PHC piles with partial normal-strength deformed bars.

关 键 词：PHC pile PRESTRESSED TENDONS DEFORMED bars seismic behavior cyclic loading test FLEXURAL capacity 

分 类 号：TU473.1[建筑科学—结构工程]