A Study of the Effects of Moment of Inertia and Shape of Pile Cross Section on the Behavior of a Single Pile under Cyclic Lateral Load in Sands by Model Tests

• Main Authors: Fang-I Liao, 廖方意
• Other Authors: Kuang-Hsiang Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/88909274864865819206

碩士 === 逢甲大學 === 土木工程所 === 95 === To confer the influence of pile behavior with the change of cross section shape and area moment of inertia, the indoor model tests had been performed in this study, which used lateral cyclic loading to exerted on the single pile with the different area moment of the inertia of circular and square cross section, and on the single hollow pile with the same area moment of inertia of circular and square cross section. The test results revealed that with the number of cycles gradually increased, the bending moment of circular and square hollow pile at the head will tend to decrease, and the smaller the area moment of inertia are, the decrease will be more conspicuous. And with the number of cycles increased, the bending moment will become larger, but the bending moment decreased when hollow circular pile''s outer diameter was 44.78mm and when the hollow square pile was 19mm in perimeter. With the moment of inertia increase, the bending moment won’t be influenced by the increase of the number of cycles. Because the head of the pile isn’t fixed completely, the maximum bending moment won’t occur at the head of the pile. For the circular and square hollow pile, the lateral stiffness at the head of the pile will increase when the moment of inertia increase. When pushing the pile, the lateral stiffness is larger than pulling, and under the cyclic lateral loading the lateral stiffness at the head of pile will tend to be the same.