Static and Dynamic Stability of Elastomeric Bearings for Seismic Protection of Structures

Sánchez, José Antonio Jódar; Masroor, A.; Mosqueda, Gilberto; Ryan, Keri L.

doi:10.1061/(asce)st.1943-541x.0000660

Cited by 81 publications

(45 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, several papers on stability problems, also very recent (Buckle et al 2002;Warn and Weisman 2011;Weisman and Warn 2012;Sanchez et al 2013;Masroor et al 2012;Han et al 2013), refer to rubber bearings with very low values of both S 1 and S 2 (S 1 = 5.5-10; S 2 = 1.8-2.5), which seem neither realistic nor feasible in actual design solutions; further the importance of S 2 in affecting the stability of the bearings is not specifically addressed: as a matter of fact, the value of S 2 for the tested/analyzed bearings is not explicitly given in the papers and is not accounted for in the interpretation and discussion of the experimental and numerical outcomes.…”

Section: Values Of S 1 and S 2 In Rbs (And Related Research)mentioning

confidence: 99%

See 1 more Smart Citation

Stability issues and pressure–shear interaction in elastomeric bearings: the primary role of the secondary shape factor

Montuori

Mele

Marrazzo

et al. 2015

Bull Earthquake Eng

View full text Add to dashboard Cite

Stability of isolation rubber bearings is a topic widely studied and concerns (1) the critical load capacity in the undeformed configuration, under long-term load (gravity) effects; and (2) the stability condition under short-term vertical pressure (due to gravity plus seismic loads) at large lateral deformations. In this paper the problem of elastomeric bearing stability under large lateral displacements is addressed through FEM parametric analysis; rubber bearings typical of current design practice, characterized by S 1 = 20 are considered, with the value of the secondary shape factor S 2 being varied between 1.5 and 6.2 in order to assess the effect of slenderness on the mechanical behavior, failure mode, and interaction vertical pressure-shear deformation. The analysis results show that the sensitivity of the shear response to the applied vertical pressure is directly related to the value of S 2 and that S 2 has an overwhelming effect on the stability behavior and shear response of the bearing, as compared to the effect of the primary shape factor and of the rubber shear modulus. Finally, S 2 is the parameter which governs the failure mode of the bearing in the seismic condition (vertical pressure-shear deformation). On the basis of these results, design implications are discussed.

show abstract

Section: Values Of S 1 and S 2 In Rbs (And Related Research)mentioning

confidence: 99%

“…While the influence of S 1 on the buckling capacity has been recognized and widely studied both experimentally and numerically (Buckle and Liu 1994;Takayama and Morita 2012;Han et al 2013;Sanchez et al 2013;Weisman and Warn 2012;Warn and Weisman 2011), the effect of S 2 has not been comparably explored.…”

Section: Introductionmentioning

confidence: 98%

Stability issues and pressure–shear interaction in elastomeric bearings: the primary role of the secondary shape factor

Montuori

Mele

Marrazzo

et al. 2015

Bull Earthquake Eng

View full text Add to dashboard Cite

show abstract

“…A model that includes the influence of vertical load on the effective horizontal stiffness and lead-core yield strength was developed by Ryan et al [35] and has been implemented in OpenSees [26]. Models that account for the second-order effects due to vertical load at large horizontal displacement have been developed [36][37][38] and are capable of exhibiting zero or negative tangential horizontal stiffness as has been experimentally demonstrated [39]. However, these models have not been widely adopted due to the extensive experimental data required to calibrate the model parameters.…”

Section: Lead-rubber Bearingsmentioning

confidence: 99%

A Review of Seismic Isolation for Buildings: Historical Development and Research Needs

2012

View full text Add to dashboard Cite

Seismic isolation is a technique that has been used around the world to protect building structures, nonstructural components and content from the damaging effects of earthquake ground shaking. This paper summarizes current practices, describes widely used seismic isolation hardware, chronicles the history and development of modern seismic isolation through shake table testing of isolated buildings, and reviews past efforts to achieve three-dimensional seismic isolation. The review of current practices and past research are synthesized with recent developments from full-scale shake table testing to highlight areas where research is needed to achieve full seismic damage protection of buildings. The emphasis of this paper is on the application of passive seismic isolation for buildings primarily as practiced in the United States, though systems used in other countries will be discussed.

show abstract

“…In this study an enhanced 81 analytical model is developed based on the nonlinear model developed by Nagarajaiah and Ferrell (1999) 82 and its effectiveness in predicting the dynamic response of elastomeric bearings is evaluated and verified 83 using experimental data from the study by Sanchez et al (2012). The key contribution of this study is to 84 develop a detailed analytical model that is capable of modeling the nonlinear response of elastomeric 85 bearings under extreme loads, including the capability to more accurately capture its dependence on 86 horizontal displacement and axial loads at displacements exceeding the stability limit.…”

Section: Validated and Verified Their 40mentioning

confidence: 99%

Dynamic Lateral Stability of Elastomeric Seismic Isolation Bearings

et al. 2014

Self Cite

View full text Add to dashboard Cite

Static and Dynamic Stability of Elastomeric Bearings for Seismic Protection of Structures

Cited by 81 publications

References 8 publications

Stability issues and pressure–shear interaction in elastomeric bearings: the primary role of the secondary shape factor

Stability issues and pressure–shear interaction in elastomeric bearings: the primary role of the secondary shape factor

A Review of Seismic Isolation for Buildings: Historical Development and Research Needs

Dynamic Lateral Stability of Elastomeric Seismic Isolation Bearings

Contact Info

Product

Resources

About