20.500.12556/RUL-114835 Formulation of risk-targeted seismic action for the force-based seismic design of structures A risk targeted design spectral acceleration and the corresponding seismic design action for the force based design of structures is introduced by means of two formulations. The first one called direct formulation utilizes the seismic hazard function at the site of the structure. Because the seismic action defined in the codes is often associated with a designated return period, an indirect formulation is also introduced. It incorporates a risk targeted safety factor that can be used to define a risk targeted reduction factor. It is shown that the proposed formulations give analogical results and provide an insight into the concept of the reduction of seismic forces for the force based seismic design of structures if the objective is defined by a target collapse risk. The introduced closed form solution for the risk targeted reduction factor can be used to investigate how the target collapse risk, the seismic hazard parameters, the randomness of the seismic action, and the conventional parameters (ie, the overstrength factor and the deformation and energy dissipation capacity) affect the seismic design forces in the case of force based design. However, collaborative research is needed in order to develop appropriate models of these parameters. In the second part of the paper, the proposed formulations are demonstrated by estimating the risk targeted seismic design action for a six storey reinforced concrete building. By verifying the collapse risk of the designed structure, it is demonstrated that the risk targeted seismic action, in conjunction with a conventional force based design, provided structure with acceptable performance when measured in terms of collapse risk. earthquake engineering structural engineering potresno inženirstvo gradbene konstrukcije true false true Angleški jezik Slovenski jezik Članek v reviji 2020-03-18 10:08:51 2020-03-18 10:13:52 2022-08-26 03:52:47 0000-00-00 00:00:00 2019 0 0 Str. 1406-1428 št. 12 Letn. 48 2019 0000-00-00 Zaloznikova Objavljeno apc 2019-01-06 2019-04-20 2019-06-02 624.042.7 0098-8847 10.1002/eqe.3206 9012577 25358592 RAZ_Zizmond_Jure_2019.pdf RAZ_Zizmond_Jure_2019.pdf 1 DC896A5B9B8AFFB7148075DE8B7FD4A8 4aab52583a4a29bc232bb5a07fbdd5ca1c1d7617defd14aaf2c08f27fd51e62c 9c6fecec-40c7-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=150791 Fakulteta za gradbeništvo in geodezijo 0 0 0