RELIABILITY-BASED CALIBRATION OF MAIN BRAZILIAN STRUCTURAL DESIGN CODES

WAGNER CARVALHO SANTIAGO; HENRIQUE MACHADO KROETZ; SERGIO HAMPSHIRE SANTOS; FERNANDO REBOUÇAS STUCCHI; ANDRE TEOFILO BECK

doi:10.1590/1679-78255754

RELIABILITY-BASED CALIBRATION OF MAIN BRAZILIAN STRUCTURAL DESIGN CODES

Authors

WAGNER CARVALHO SANTIAGO COLEGIADO DE ENGENHARIA CIVIL, UNIVERSIDADE FEDERAL DO VALE DO SÃO FRANCISCO, JUAZEIRO – BA - BRASIL HTTPS://ORCID.ORG/0000-0002-7939-5855
HENRIQUE MACHADO KROETZ CENTRO DE ESTUDOS MARINHOS, UNIVERSIDADE FEDERAL DO PARANÁ, PONTAL DO PARANÁ – PR - BRASIL HTTPS://ORCID.ORG/0000-0003-3977-1112
SERGIO HAMPSHIRE SANTOS DEPARTAMENTO DE ENGENHARIA CIVIL, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO, RIO DE JANEIRO – RJ - BRASIL HTTPS://ORCID.ORG/0000-0002-2930-9314
FERNANDO REBOUÇAS STUCCHI DEPARTAMENTO DE ESTRUTURAS E GEOTÉCNICA, ESCOLA POLITÉCNICA, UNIVERSIDADE DE SÃO PAULO, SÃO PAULO – SP - BRASIL HTTPS://ORCID.ORG/0000-0003-4149-0985
ANDRE TEOFILO BECK DEPARTAMENTO DE ENGENHARIA DE ESTRUTURAS, ESCOLA DE ENGENHARIA DE SÃO CARLOS, UNIVERSIDADE DE SÃO PAULO, SÃO CARLOS – SP - BRASIL HTTPS://ORCID.ORG/0000-0003-4127-5337

DOI:

https://doi.org/10.1590/1679-78255754

Abstract

STRUCTURAL RELIABILITY THEORY HAS LONG BEEN RECOGNIZED AS THE PROPER TOOL TO GUIDE SELECTION OF PARTIAL SAFETY FACTORS IN LIMIT STATE STRUCTURAL DESIGN CODES. BRAZILIAN DESIGN CODES, HOWEVER, HAVE NEVER BEEN THROUGH THIS CALIBRATION PROCESS. THIS PAPER ADDRESSES THE RELIABILITY-BASED CALIBRATION OF PARTIAL SAFETY FACTORS OF BRAZILIAN DESIGN CODES FOR STEEL (NBR8800:2008) AND CONCRETE (NBR6118:2014) STRUCTURES. THE STUDY IS BASED ON AN EXTENSIVE DATASET OF LOAD AND STRENGTH VARIABLES, ADDRESSING THE BRAZILIAN REALITY, AS MUCH AS POSSIBLE. CALIBRATION MINIMIZES THE VARIATIONS OF RELIABILITY INDEXES OF THE MOST DIVERSE STRUCTURES DESIGNED ACCORDING TO THE CODES OF INTEREST, WITH REGARD TO A TARGET RELIABILITY INDEX CHOSEN BY THE ANALYST. THE MAIN RESULT OF CALIBRATION IS TO MAKE RELIABILITY INDEXES MORE UNIFORM, FOR DIFFERENT DESIGN CONFIGURATIONS. IN CASE OF BRAZILIAN CODES, THIS COULD BE ACHIEVED BY INCREASING MAIN VARIABLE LOADS, AND REDUCING THE COMBINATION VALUES OF SECONDARY LOADS. THIS PAPER PRESENTS RESULTS THAT ARE NOT (YET) RECOMMENDED FOR ADOPTION IN BRAZILIAN CODES, BUT WHICH SHOULD BE DISCUSSED WITH THE COMMUNITY IN ORDER TO REACH MINIMAL CONSENSUS.

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Published

2019-12-12

Issue

Vol. 17 No. 1 (2020)

Section

Articles

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