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Structural Engineering and Mechanics Volume 90, Number 5, June10 2024 , pages 493-504 DOI: https://doi.org/10.12989/sem.2024.90.5.493 |
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Condition assessment of aged underground water tanks-Case study |
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Zafer Sakka, Ali Saleh, Thamer Al-Yaqoub, Hasan Karam, Shaikha AlSanad, Jamal Al-Qazweeni, Mohammad Mosawi and Husain Al-Baghli
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| Abstract | ||
| This paper presents the methodology and results for the investigation of the structural safety of 40 aged underground water tanks to support the weight of photovoltaic (PV) systems that were supposed to be placed on their roof reinforced concrete (RC) slabs. The investigation procedure included (1) review of available documents; (2) visual inspection of the roof RC slabs; (3) carrying out a series of nondestructive (ND) tests; and (4) analysis of results. Out of the 40 tanks, eleven failed the visual inspection phase and were discarded from further investigation. The roof RC slabs of the tanks that passed the visual inspection were subjected to a series of ND tests that included infrared thermography, impact echo, ultrasonic pulse velocity (UPV), Schmidt hammer, concrete core compressive strength, and water-soluble chloride content. The NDT results proved that eight more tanks were not suitable to support the PV systems. Based on the results of the visual inspection and testing, a probabilistic decision-making criterion was established to reach a decision regarding the structural integrity of the roof slabs. The study concluded that the condition of the drainage filter was essential in protecting the tanks and its intact presence can be used as a strong indication of the structural integrity of the roof RC slabs. | ||
| Key Words | ||
| assessment of existing structures; impact echo; infrared thermography; Schmidt hammer; ultrasonic pulse velocity; visual inspection; water-soluble chlorides content | ||
| Address | ||
| Zafer Sakka, Ali Saleh, Thamer Al-Yaqoub, Hasan Karam, Shaikha AlSanad, Jamal Al-Qazweeni, Mohammad Mosawi and Husain Al-Baghli: Energy and Building Research Center, KISR, P.O. Box 24885, Safat 13109, Kuwait | ||