Radiermetrisk

Radiermetrisk is a term used in civil engineering to describe a framework for evaluating and managing risk associated with raft foundations (radier). The concept combines structural assessment of a raft foundation with probabilistic risk analysis to account for uncertainties in soil properties, loading, and construction conditions. It is often presented as a risk-based extension to traditional deterministic design approaches.

Usage and scope: The idea is to quantify not only whether a raft foundation can meet bearing and settlement criteria, but also how likely it is to fail or perform outside acceptable limits under mixed scenarios such as variable soil stiffness, groundwater changes, or seismic events. The term appears in regional or academic writings and is not uniformly standardized.

Methodology: Typical radiermetrisk workflows include defining performance objectives (e.g., allowable settlement, tilt, crack width); identifying uncertain inputs; building probabilistic models (reliability analysis, Monte Carlo simulation, or fragility curves); and computing risk metrics such as expected annual damage, risk scores, or probability of exceeding limit states. Outputs may include risk maps, priority lists for monitoring, and design optimization recommendations.

Applications and limitations: The approach can inform early-stage design, retrofit decisions, and maintenance planning for raft foundations in complex soils or challenging environments. Its main limitations are data requirements, model complexity, and the lack of universal standards, which can affect comparability and decision thresholds.

See also: raft foundation, structural reliability, risk assessment, probabilistic engineering.