Seismic Performance of Prestressed High Strength Concrete Pile to Pile Cap Connections

Abstract

Six pile-cap connections were tested to evaluate performance of prestressed high-strength concrete piles (PHC pile)-cap connection under cyclic loading. The failure modes, hysteretic performance, ductility and bearing capacity were observed and analyzed. In addition, the seismic performance of pile-cap connection with different connections and cutting-off pile was studied. The test results showed that the connections appear to be bending damage. The two flexural modes were tensile rupturing of prestressed bar and yielding of anchor bars. The connections were severely damaged because of the yielding of anchor bars and appearing of the plastic hinge. The bond slippage failure of anchor bars was not observed in the cap, and the length of anchor bars meet requirements. It shows that the bearing capacity and energy dissipation capacity increased with the rotation capacity of pile connection. Nonlinear finite element models were established to analyze the mechanical properties of these connections using ABAQUS. The moment-displacement curves obtained from the numerical analysis compared well with the experimental results. The effects of parameters on the behavior of the connections were conducted based on the numerical model.

Parametrically excited vibrations of marine riser under random wave forces and earthquake

“…Although the earthquake has significant effect on the riser, few results have been reported for riser seismic dynamic analysis except those from Duan et al (2010) and Li et al (2013). Some researchers (Nguyen, 2015; Su and Sun, 2013; Wang et al, 2014b) presented various computational methods for analyzing seismic-induced vibration of suspended cables, cracked beam-like bridge, and high-strength concrete pile. However, the study of dynamic response on the riser under combined effect of random wave forces and earthquake excitation has not been seen yet.…”

Bearing Performance of Prestressed High-Strength Concrete Pipe Pile Cap Connections under Truncated Pile Conditions

“…Guo et al [16,17], He et al [18,19], Yang et al [20,21] and Wang et al [22] analyzed the bearing performance of PHC pipe piles and cap joints by using full-scale tests and numerical simulation methods. Reference [16] proposed a formula for the calculation of the bearing capacity of PHC pipe piles and cap joints under horizontal earthquake action.…”

The Numerical Study of The Need for Transverse Reinforcement of a Spun Pile

“…Experimental and numerical studies of the spun pile connection in China have been carried out by [8], [9]. Though the volumetric ratios were not mentioned but based on the data, the spun pile had transverse reinforcement slightly lower than the minimum standard.…”