ǂA ǂsimplified risk-targeted decision model for the verification of the seismic performance of critical infrastructure components to the operational limit state
Abstract
A simplified risk-targeted decision model for the verification of the seismic performance of infrastructurecomponents to the operational limit state is presented. It assumes linearity between the intensity measure andthe engineering demand parameter and requires the evaluation of the displacement demand for a hazard-tar-geted design earthquake and of the displacement capacity. The latter is defined as the ratio between the op-erational limit-state displacement and a risk-targeted safety factor, which depends on the seismicity of the re-levant location, on the randomness of the intensity measures causing the operational limit-state, and on theacceptable (target) probability of exceeding this limit state. In the paper, the theoretical background of risk-targeted safety factor is first explained, followed by a discussion on the sensitivity of the risk-targeted safetyfactor to the input parameters. The design procedure involving the simplified risk-targeted decision model isthen introduced and demonstrated by means of an example of a simple pipe rack located at a petrochemicalplant. Within the scope of the presented example, the operational limit-state displacement of the pipe rack isestimated on thebasis of the limit-statestrains of a pipe attached to the frame. The risk-targeted safety factor isthen evaluated, and the frame is designed. It is shown that the application of the proposed procedure isstraightforward once the operational limit-state displacement has been determined. The advantage of the pro-cedure is that the target risk is accounted for by the risk-targeted safety factor, which can be calculated withrespect to the importance of the equipment of the critical infrastructure. Additionally, the proposed decisionmodelcanbeeasilyadoptedbyengineers,becausetheseismicdemandiscalculatedbyanalogytotheEurocode.However,atthisstageoftheresearch,theapplicationoftheproposeddecisionmodelislimitedtostructuresthatdo not exhibit any significant nonlinear seismic response at the operational limit state, and to structures wherethe equal displacement rule applies.
Keywords
civil engineering;engineering structures;earthquake engineering;
Data
| Language: | English |
|---|---|
| Year of publishing: | 2020 |
| Typology: | 1.01 - Original Scientific Article |
| Organization: | UL FGG - Faculty of Civil and Geodetic Engineering |
| UDC: | 624.042.7 |
| COBISS: |
9028961
|
| ISSN: | 0141-0296 |
| Views: | 502 |
| Downloads: | 319 |
| Average score: | 0 (0 votes) |
| Metadata: |
|
Other data
| Secondary language: | Slovenian |
|---|---|
| Secondary keywords: | gradbeništvo;gradbene konstrukcije;potresno inženirstvo; |
| Type (COBISS): | Article |
| Embargo end date (OpenAIRE): | 2022-02-20 |
| Pages: | str. 1-14 |
| Volume: | ǂŠt. ǂ110019 |
| Issue: | ǂletn. ǂ204 |
| Chronology: | feb. 2020 |
| DOI: | 10.1016/j.engstruct.2019.110019 |
| ID: | 12152198 |
Recommended works:
ǂA ǂsimplified risk-targeted decision model for the verification of the seismic performance of critical infrastructure components to the operational limit state
2020,
no subtitle data available
Fatality risk and its application to the seismic performance assessment of a building
2020,
no subtitle data available
Recent advances in the research of the seismic response of RC precast buildings at the University of Ljubljana
2021,
no subtitle data available
ǂThe ǂReduced-degree-of-freedom model for seismic analysis of predominantly plan-symmetric reinforced concrete wall frame building
2021,
article belongs to the "Special issue selected papers" from the 1st Croatian conference on earthquake engineering - (1CroCEE)
Risk-based multilevel methodology to stress test critical infrastructure systems
2020,
no subtitle data available