Statistical evaluation of maximum displacement demands of SDOF systems by code-compatible nonlinear time history analysis

Kayhan, Ali Haydar; Demir, Ahmet; Palancı, Mehmet

doi:10.1016/j.soildyn.2018.09.008

Cited by 15 publications

(4 citation statements)

References 25 publications

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“…It is noted that IDA is a set of time history nonlinear dynamic analyses under different numerous records therefore selection of seismic records is an important step to assess the performance of structures probabilistically. Some researchers evaluate the influence of the features, content and number of the seismic excitations on the analysis results [43][44][45][46][47][48][49][50]. In this paper, these records are first scaled according to the peak ground velocity (PGV).…”

Section: Ground Motion Recordsmentioning

confidence: 99%

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Sadeghi,

Kazemi,

Razmkhah

et al. 2024

Res. Eng. Struct. Mat.

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In this research, the influence of the pounding phenomenon of two adjacent steel moment resisting frames (SMRFs) with 2 and 5-story with an intermediate ductility is investigated by considering equal and unequal heights under seismic excitations. In this way, two scenarios are applied. The first and second scenarios are related to the pounding of two SMRFs with an equal height (both frames with 2-story) and an unequal height (2-story and 5-story frames), respectively. In the following, at first, sensitivity analysis is conducted by the Monte Carlo simulation (MCS) method. Then, the collapse performance of the studied SMRFs is evaluated by incremental dynamic analysis (IDA), and fragility curves under 14 far-fault records and also, the failure probability is predicted by the Kriging meta-model. The results of sensitivity analysis indicate that the yield strength of cross-sections and dead load were the greatest effect on failure probability computation. Also, in the statistical level of 50%, the collapse probability of SMRFs with an equal height is 17% compared to the SMRFs with an unequal height. Also, the results of the Kriging meta-model show that the failure probability is increased by 65% in an unequal height versus an equal height.

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Section: Ground Motion Recordsmentioning

confidence: 99%

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Sadeghi,

Kazemi,

Razmkhah

et al. 2024

Res. Eng. Struct. Mat.

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“…One should be aware that certain response values of a pilotis building supported by DHC columns such as IDRmax, IDRres, and MISFs could be affected by the selection of earthquake records [31,32]. To evaluate maximum drift demands of such buildings within a certain region, soil type, target design spectrum, etc., and, furthermore, to propose a design method for such buildings requires the appropriate selection of records.…”

Section: Maximum Inter-story Shear Forcementioning

confidence: 99%

Nonlinear Dynamic Analysis of Pilotis Structures Supported by Drift-Hardening Concrete Columns

Yuan,

Takeuchi,

Sun

2023

Materials

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Pilotis structures consisting of upper concrete bearing-walls and a soft first story have been well used in residential and office buildings in urban areas to primarily accommodate parking lots. In this research, drift-hardening concrete (DHC) columns developed by the authors are proposed to form the pilotis story with the aims of reducing its excessive residual drift caused by stronger earthquakes than anticipated in current seismic codes, mitigating damage degree, and enhancing resilience of the pilotis story. Nonlinear dynamic analysis was conducted to investigate the dynamic response characteristics of the wall structures supported by DHC columns. To this end, two sample six-story one-bay pilotis structures were designed following the current Japanese seismic design codes and analyzed. One sample structure is supported by ductile concrete (DC) columns, while the other is supported by DHC columns, which have the same dimensions, steel amount, and concrete strength as DC columns. Three representative ground motions were adopted for the nonlinear dynamic analysis. The analytical parameter was the amplitude of peak ground acceleration (PGA), scaled by the peak ground velocity (PGV) ranging between 12.5 cm/s and 100 cm/s with an interval of 12.5 cm/s. The analytical results have revealed that the residual drift of the pilotis story composed of DHC columns could be reduced to nearly zero under selected earthquakes scaled up to PGV = 100 cm/s, owing to not only the inherent self-centering ability of DHC columns but also the shake-down effect, which implies that the use of DHC columns can greatly enhance resilience of pilotis structures under strong earthquake inputs and promote its application in the buildings located in strong earthquake-prone regions. The maximum inter-story shear forces (MISFs) along the building height of the two models are also compared.

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“…Selection of appropriate ground motion records for nonlinear dynamic analysis of structures plays a crucial role to estimate structural responses reasonably. Various criteria are used in the selection of ground motion records for nonlinear time history analyses; spectral matching is the primary consideration, and maximum displacement demands are also considered [36,37]. According to the Code for Seismic Design of Buildings (GB50011-2010) [32], at least two actual strong earthquake records and one artificially simulated acceleration time-history curve should be selected for time-history analysis.…”

Section: Dynamic Responsementioning

confidence: 99%

Investigation on the Seismic Performance of RC Frame Buildings with Rubber Isolation Bearing Installed in Staircases

Bai

Liang

et al. 2023

Buildings

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A rubber isolation bearing installed in a staircase (RBS) was proposed to mitigate seismic damages to the component of staircases and improve their seismic performance. A series of quasi-static tests performed with respect to the horizontal and vertical mechanical properties of RBS as well as the numerical modelling were verified with experimental results. Next, the finite element models of typical types of reinforced concrete frames (without stairs, with cast-in-place reinforced concrete stairs, and with RBS stairs) were established. The modal dynamic and non-linear elasto-plastic analyses of system-level building models were herein conducted, respectively. The effect of the RBS on the dynamic response of the whole structure and the mechanical performance of stair components was revealed. The analysis results indicated that the RBS provided the desired floor-to-floor relative drift and effectively isolate the seismic action from the stair flight. Therefore, the presence of RBS can effectively mitigate the influence of a staircase on the entire building’s structure, weaken the diagonal strut effect of flights, and reduce the inner forces of staircase components.

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Statistical evaluation of maximum displacement demands of SDOF systems by code-compatible nonlinear time history analysis

Cited by 15 publications

References 25 publications

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Probabilistic investigation of the pounding effect in steel moment resisting frames with equal and unequal heights

Nonlinear Dynamic Analysis of Pilotis Structures Supported by Drift-Hardening Concrete Columns

Investigation on the Seismic Performance of RC Frame Buildings with Rubber Isolation Bearing Installed in Staircases

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