Seismic response reduction analysis of large chassis base-isolated structure under long-period ground motions

Li, Feiyan; Lin-jian, Wang; Wu, Yingxiong

doi:10.1016/j.eqrea.2021.100026

Cited by 5 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ali et al 2 studied the damage caused to base-isolated nuclear power plants by LPGMs such as the 2011 Tohoku-Pacific Ocean earthquake and showed that the long-period component in ground motion may seriously impact the seismic risk of nuclear facilities. Li et al 3 studied the earthquake response of large chassis base-isolated structures under LPGMs and concluded that the earthquake response reduction effectiveness of SI structures under LPGMs is worse than under normal ground motions.…”

Section: Introductionmentioning

confidence: 99%

Earthquake response prediction of seismically isolated buildings based on the response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations

Kobayashi,

Sato,

Sato

2023

Japan Architectural Review

View full text Add to dashboard Cite

In 2016, a countermeasure was announced against the Nankai Trough long‐period and long‐duration ground motions (LPGMs) in Japan. However, the response spectrum method (RSM), indicated by the Ministry of Construction notification Vol. 2009 (MCN), was out of the countermeasure. An RSM considering characteristic changes due to repeated deformations has also been proposed. However, since the damping correction formula of MCN was used, its applicability to LPMGs has not been sufficiently investigated. In this paper, a method is proposed to evaluate the influence of characteristic changes due to repeated deformations using RSM for LPGMs and seismically isolated buildings using the lead plug‐inserted laminated rubber (LRB).

show abstract

Section: Introductionmentioning

confidence: 99%

Earthquake response prediction of seismically isolated buildings based on the response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations

Kobayashi,

Sato,

Sato

2023

Japan Architectural Review

View full text Add to dashboard Cite

show abstract

“…Theories are relatively complete for large chassis seismic structures (Pang., 2012;Li et al, 2021). The tower building on the large chassis is characterized by vertical irregularity.…”

Section: Introductionmentioning

confidence: 99%

Study on the seismic response of new staggered story isolated structure under different parameters

Shu

Wang

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

The new staggered story isolated structure is developed according to the base-isolated structure and the mid-story isolated structure. Quantitative calculation and evaluation of seismic damage are very important for structural safety. In this paper, the seismic damage evaluation of a new staggered story isolated structure is studied by numerical simulation and damage index calculation. A new staggered story isolated structure is established, and the effects of different layers and different chassis areas on the seismic response of the structure are studied. When the position of the bottom isolated layer stays the same, the upper isolated layer is set at different layers, which is set to the top of the 3rd, 6th and 9th layers. When the upper isolated layer keeps at the top of the 3rd layer, the chassis area is set at a different area, which is 26 m × 26 m, 36 m × 36 m and 46 m × 46 m. The results show that the new staggered story isolated structure has good isolated effects under the ground motion. For the structure set upper isolation layer is lower, the inter-layer shear force, inter-layer acceleration and inter-layer displacement are reduced. The energy dissipation effect of the structure improves. The core tube is less damaged and the plastic hinge is smaller. With the increase of chassis area, the isolated effect of the part above the upper isolated layer is good, while the shear force and acceleration of the part below the upper isolated layer of the structure increase, the damage at the core tube changed little and the appearance of the plastic hinge increased. Under earthquakes, with the change in position of the upper isolated layer and the area of the chassis of the new staggered story isolated structure, the displacement, tensile stress and compressive stress of the isolated bearing still meet the requirements of the standard.

show abstract

Earthquake response prediction of seismically isolated buildings based on response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations, part 2: Improvement of prediction accuracy by equivalent damping factor calculation method using effective ductility factor

Kobayashi,

Zhu,

Senda

2024

Japan Architectural Review

View full text Add to dashboard Cite

The response spectrum method (RSM), specified by the Ministry of Construction notification Vol. 2009, is not part of the countermeasure to address the Nankai trough long‐period and long‐duration ground motions (LPGMs) announced in 2016. Consequently, in this study, an approach was proposed to assess the effect of changes in characteristics due to repeated deformations using the RSM for LPGMs and seismically isolated buildings using lead rubber bearings (LRBs). However, this study identified potential areas for improvement in the calculation of effective damping using the RSM. An effective damping calculation method of the RSM using an effective ductility factor is introduced to enhance the accuracy of the proposed method. The proposed RSM‐based method was verified against the methods based on nonlinear time history analysis. The earthquake response prediction results using the proposed method were compared with those of not only the simplified method but also the precise and the quasi‐precise methods. The accuracy of earthquake response prediction using the proposed approach is increased by 30%–50% when the effective ductility factor is used to compute the effective damping. Therefore, earthquake response can be predicted using the proposed method, and the accuracy achieved is similar to the nonlinear time history analysis.

show abstract

Seismic response reduction analysis of large chassis base-isolated structure under long-period ground motions

Cited by 5 publications

References 5 publications

Earthquake response prediction of seismically isolated buildings based on the response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations

Earthquake response prediction of seismically isolated buildings based on the response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations

Study on the seismic response of new staggered story isolated structure under different parameters

Contact Info

Product

Resources

About