Evaluation of the Long-term Plastic Pipe Stiffness by Conventional and Accelerated Test Methods

in International Symposium (oral presentation paper), 國際研討會(全文口頭發表)
標題Evaluation of the Long-term Plastic Pipe Stiffness by Conventional and Accelerated Test Methods
出版類型國際研討會(全文口頭發表)
出版年度2008
AuthorsChiwan Wayne Hsieh, 謝啟萬
出版日期Mar 1 2009 12:0
會議地點Cancun
其他編號0000
中文摘要

Parallel-plate loading mechanism (ASTM D2412 standard test method) was used for investigating the long-term pipe
stiffness values of HDPE, PE corrugated, PVC and ABS pipes by conventional and accelerated test procedures. The
nominal inside diameters of the test pipes were 300 and 400mm. Generally, long-term plastic pipe stiffness values
decrease as increasing test duration and shown as an S-type long-term deflection curve for the test plastic pipes on a
semi-log time scale. Long-term pipe deflection is a function of pipe material properties, pipe geometry, SDR value, and
external loading conditions. The Rate Process Method (RPM) was used as the accelerated method for estimating the
long-term pipe deflection and pipe stiffness value in conjunction with the parallel-plate loading mechanism. Long-term
plastic pipe stiffness values were formulized based upon the test results.

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