Review of the influence of concrete creep on the operation of pre-stressed steel-reinforced concrete structures of civil defense structures

The way concrete slowly deforms over time has a big effect on the strength and stress distribution of pre‑stressed steel‑reinforced concrete parts. In critical projects like civil‑defense structures, we must predict how internal forces shift between the concrete and the high‑strength steel to avoid early failures. This work gives analytical guidance for assessing concrete creep according to design codes such as Eurocode 2 and DBN B.2.6‑98:2009. The framework sets up a mathematical model of time‑dependent deformation, focusing on how accumulated compressive strain changes the load‑sharing in composite cross‑sections. By tracking the evolution of the stress‑strain state, the method helps evaluate whether a structure remains functional and reliable under long‑term loads.

The study highlights the key parameters that control long‑term prestress loss and deformation limits, providing a systematic way to model rheological degradation in protective infrastructure. With this review, researchers can run numerical simulations to measure how concrete aging, humidity, and constant stress levels affect the performance of civil‑defense facilities.

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