Simplified approaches for estimation of required seismic separation distance between adjacent reinforced concrete buildings

Kamal, Muhammet; İnel, Mehmet

doi:10.1016/j.engstruct.2021.113610

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…Several techniques are available for performing the scaling of earthquake excitation records following the seismic design code requirements 41 – 43 . The amplitudes of the selected records are scaled such that the median spectrum of the spectra of the scaled ground motion records matches the target spectrum of the considered seismic hazard intensity (see Fig.…”

Section: Earthquake Recordsmentioning

confidence: 99%

Nonlinear analysis of reinforced concrete buildings with different heights and floor systems

Abd-Elhamed,

Mahmoud,

Alotaibi

2023

Sci Rep

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Most civil structures exhibit nonlinear behavior during moderate to severe earthquakes. Consequently, inelastic analysis is needed for seismic design. Several dynamic and static analysis methods are available for the assessment and design of engineering structures. Two of the available methods in terms of nonlinear dynamic time history analysis and nonlinear static analysis, which is known as pushover analysis, are employed herein to comprehensively study and investigate the seismic performance of multi-story building structures with different floor systems. Moreover, the study is extended to assess the actual values of the response reduction/modification factor (R-factor) for each building model, then evaluate the values with the code-recommended design values. Three-dimensional finite element building models with 5, 10 and 15 stories are developed for the evaluation process. The advanced computer program ETABS is used for developing and analyzing the buildings considering material and geometrical nonlinearity. A suit of seven earthquake records is considered and scaled according to the ASCE-16 seismic design code to excite the building models. The obtained results evidently reveal that the type of floor slab significantly impacts the seismic response of the building. More specifically, the effects of floor slabs on seismic demands are more evident in low- and mid-rise buildings. In addition, the type of slab system and height of the building have more influence on the response modification factors, especially for low-rise building models.

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Section: Earthquake Recordsmentioning

confidence: 99%

Nonlinear analysis of reinforced concrete buildings with different heights and floor systems

Abd-Elhamed,

Mahmoud,

Alotaibi

2023

Sci Rep

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“…Current research focuses on the vibration control of individual building structures, but the land area available for building construction is limited in metropolitan areas, and therefore the spacing of building structures is gradually decreasing to form adjacent building structures. However, collisions between adjacent building structures under seismic action present a significant hazard to building safety, so controlling the vibration response of adjacent building structures is necessary 44 – 46 . The inerter has a good performance in controlling adjacent buildings 47 .…”

Section: Introductionmentioning

confidence: 99%

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Kang,

Tang,

Wei

et al. 2024

Sci Rep

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Building structures are subjected to strong earthquakes, which result in lateral collisions between them. Such collisions often cause severe structural damage and exacerbate the seismic hazard risk of building structures during earthquake events. This paper discusses the application of vibration control devices based on negative stiffness inerter damper in single-story adjacent building structures. The dynamic equations of the vibration control system containing different types of negative stiffness inerter damper under seismic excitation are established as a unified model. The H2 norm theory and Monte Carlo pattern search method are used to optimize the design parameters to improve the vibration control performance of the system, and the dynamic characteristics of the system are investigated. The results demonstrate that attaching negative stiffness inerter damper to adjacent building structures can effectively improve the overall seismic capacity reserve of the building and reduce the risk of collision of adjacent building structures; improve the robustness and stability of the system, and better reduce the displacement response of the building structure under seismic excitation. In addition, the potential of NSID-based vibration control devices to convert seismic energy into usable electricity has been investigated.

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“…The conducted studies in the field of structural damage in past earthquakes show that adjacent buildings with partial discontinuity or with a common wall between two structures may suffer serious damage during an earthquake and even go to the point of collapse [3,4]. Kamal and Inel showed that pounding phenomenon may alter the dynamic features of two adjacent buildings significantly [5]. The pounding problem was first numerically modeled for single-degree-of-freedom (SDOF) structures [6][7][8], and then for multi-degree-of-freedom (MDOF) structures, these analyses were performed numerically with concentrated mass [9,10], and then for three adjacent buildings, numerical analyses related to pounding were also performed [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Past earthquakes have shown that the pounding issue is a serious topic for tall buildings in the vicinity whose floors are not on the same level [13][14][15][16][17]. Another important reason for the pounding issue is that different natural frequencies of adjacent buildings may vibrate out of phase [5] . Eftychia et al [19] evaluated the influence of base isolation on the impact of two buildings and Forcellini [20] studied the effect of the interaction of soil and structure on the pounding phenomenon.…”

Section: Introductionmentioning

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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Simplified approaches for estimation of required seismic separation distance between adjacent reinforced concrete buildings

Cited by 13 publications

References 30 publications

Nonlinear analysis of reinforced concrete buildings with different heights and floor systems

Nonlinear analysis of reinforced concrete buildings with different heights and floor systems

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

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

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