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Probabilistic Performance Assessment of Deteriorating Buried Concrete Sewer Pipes

Zamanian, Soroush, Zamanian
http://rave.ohiolink.edu/etdc/view?acc_num=osu1471731571

Abstract Details

2016, Master of Science, Ohio State University, Civil Engineering.
Deterioration in wastewater infrastructure systems is recognized as a serious, worldwide concern. Deterioration due to sulfate attack is one of the primary reasons of functional and structural failures in concrete sewer pipes which is a significant component in wastewater infrastructure systems. Any type of failure may lead to serious health, environmental, and economical issues, lack of the wastewater services, incidents, and traffic delays. The deterioration model presented by Environmental Protection Agency (EPA) is used to obtain the corrosion rate. Subsequently, a time-dependent model is utilized to determine the loss of wall thickness in concrete pipes. In this study, ANSYS is used to construct a nonlinear three-dimensional Finite Element model, which is capable of simulating the behavior of buried concrete sewer pipes under gravity and truck loads. Deterioration of concrete pipe is modeled in ANSYS in such a way that a continuous degradation of the system is considered during the service life of the pipes. A Monte Carlo-based reliability assessment method that uses Latin Hypercube Sampling technique is employed to capture the uncertainties associated with concrete and soil characteristics. The crack width which is the primary reason for leakage in the concrete pipes, is defined as the limit state function, and can be obtained from the tensile stresses on the pipe wall. Hence, the descending portion of stress-strain curve of concrete on the tension side is studied through post-processing of ANSYS results. The results indicate the significant impact of moderate deterioration on the performance and probability of failure of concrete sewer pipes for the serviceability level. In addition, elastic modulus of sidefill and bedding soil are found to have considerable effect on the stress distribution along the deteriorated concrete pipe.
Absollah Shafieezadeh (Advisor)
Jieun Hur (Committee Member)
Halil Sezen (Committee Member)
108 p.
Civil Engineering; Water Resource Management
Wastewater Infrastructure Systems, Probabilistic Performance Assessment, Deteriorating Buried Concrete Sewer Pipes

Recommended Citations

Citations

  • Zamanian, Zamanian, S. (2016). Probabilistic Performance Assessment of Deteriorating Buried Concrete Sewer Pipes [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471731571

    APA Style (7th edition)

  • Zamanian, Zamanian, Soroush. Probabilistic Performance Assessment of Deteriorating Buried Concrete Sewer Pipes. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1471731571.

    MLA Style (8th edition)

  • Zamanian, Zamanian, Soroush. "Probabilistic Performance Assessment of Deteriorating Buried Concrete Sewer Pipes." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471731571

    Chicago Manual of Style (17th edition)

osu1471731571
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This open access ETD is published by The Ohio State University and OhioLINK.