Seismic Testing of Critical Lifelines Rehabilitated with Cured in Place Pipeline Lining Technology

Numerical simulation and seismic performance evaluation of buried pipelines rehabilitated with cured‐in‐place‐pipe liner under seismic wave propagation

“…Other parameters used to define the shape of the hysteretic response of the liner-reinforced joint were calibrated from the cyclic test results by minimizing the errors between the numerically and experimentally obtained total absorbed energy. [17,18]. Therefore, a series of analyses were performed utilizing the OPENSEES joint model by further increasing the loading amplitude, in order to capture the significant reduction in axial resistance of the push-on joint after the liner rupture, and to simulate the post failure behavior of the joint.…”

“…This second model type is intended to represent the following two cases: (i) existing buried continuous pipelines with several circumferential cracks along the same pipeline due to aging and corrosion and (ii) underground segmental DI pipelines with multiple CIPP liner-reinforced push-on joints present along the pipeline. The hysteretic joint model was calibrated from the cyclic tensile tests of the push-on joints retrofitted with the InsituMain ® liner [17,18], produced by Insituform Technologies, LLC, a manufacturer of CIPP liners for pipeline rehabilitation, and subsequently incorporated in the pipeline models with different numbers of joints. The detailed configuration of a push-on joint reinforced by InsituMain ® liner is illustrated in Figure 3.…”

“…Laboratory cyclic tensile tests of CIPP liner-reinforced joints with variable loading rates, performed at the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) site of University at Buffalo, indicated that the loading rates in the range of 1.27 mm/min (0.05 in/min) to 1,270 mm/min (50 in/min) did not have significant effects on the axial behavior of the CIPP liner-reinforced joint [17,18]. Based on the axial response of CIPP liner-reinforced joints under quasi-static loading, new constitutive numerical models are proposed in this section for push-on joints reinforced with the InsituMain ® liner.…”

“…The CIPP liner is stipulated to provide an economic and environmentally friendly alternative for pipeline rehabilitation without expensive and disruptive excavation during replacement of aging and structurally unsound pipelines. Previous experimental evidence confirms that after rehabilitation with CIPP liners, water pipelines with circumferential cracks and defective joints were able to resist high intensities of TGD and repetitive axial loading [15][16][17]. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner-reinforced pipelines remains a significant barrier to the seismic design and rehabilitation of underground pipelines.…”

“…This framework also serves as a preliminary attempt in the development of specific seismic qualification guidelines for lifeline components and systems, which is an urgent need in the engineering practice of design and construction of buried pipelines according to the research of National Earthquake Hazards Reduction Program [16]. Moreover, using the experimental and analytical studies presented by Zhong [17] and Zhong et al [18], this research considers a particular configuration of CIPP liner-reinforced pipelines as a case study with the aim of verifying the applicability of this innovative pipeline rehabilitation scheme in seismically active regions.…”