Stability of Elastomeric and Lead-Rubber Seismic Isolation Bearings

Weisman, Jared; Warn, Gordon P.

doi:10.1061/(asce)st.1943-541x.0000459

Cited by 91 publications

(34 citation statements)

References 7 publications

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“…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%

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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

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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.

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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

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“…Dengan memasang suatu sistem isolasi seperti karet bantalan (bearing pad) yang dapat menyerap gangguan tersebut, diharapkan dapat memperpanjang umur pakai serta memperkuat struktur jembatan dan jalan layangsehingga meningkatkan ketahanannya terhadap getaran yang timbul akibat gempa bumi (Manos et al, 2007;Kitaharaet al, 2012;Weisman and Warn, 2012;Filipov et al, 2012;Asl et al, 2014;Warn and Ryan, 2012). Teknologi ini dinilai cukup efektif dan berbiaya relatif rendah (Haque et al, 2013).Elemen ini bekerja dengan meneruskan beban dari bangunan atas ke bangunan bawah yang dipasang diantara badan/gelagar (super structure) dan pilar/tiang (sub structure) (Iancuet al, 2012).…”

Section: Karet Bantalan Untuk Perletakan Jembatan Dan Jalan Layangunclassified

Kajian Tekno Ekonomi Pendirian Industri Karet Bantalan Jembatan Jenis Karet Alam Dan Karet Kloroprena

Puspitasari

Cifriadi

Falaah

2017

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Peningkatan konsumsi domestik karet alam melalui pemanfaatan produk karet untuk mendukung pembangunan infrastruktur menjadi solusi untuk kembali memperkuat harga karet alam yang sejak akhir tahun 2011 terus mengalami pelemahan. Produk karet bantalan jembatan yang berfungsi sebagai isolator pelindung struktur jembatan dari getaran dan beban lalu lintas berpotensi untuk dikembangkan karena permintaan tinggi di pasaran. Dalam artikel ini diulas kajian tekno-ekonomi pendirian industri karet bantalan jembatan karet alam dan kloroprena dari aspek teknik hingga ekonomi. Data primer diperoleh dengan metode survei melalui teknik wawancara kepada responden yang dipilih secara sengaja, data sekunder dilakukan dengan menerapkan teknik multiplikasi dokumen dan pencatatan data dari instansi terkait lainnya. Metode pengolahan data menggunakan analisis deskriptif kualitatif dan kuantitatif. Hasil kajian diketahui potensi pasar produk karet bantalan jembatan masih terbuka sebesar 57.000 di tahun 2016 dan ditetapkan kapasitas produksi sebesar 17.000 per tahun (30%) dengan komposisi 75% karet bantalan dari karet alam dan 25% dari karet kloroprena. Ukuran karet bantalan yang diproduksi mengacu pada ukuran standar yang ditetapkan oleh kementerian PUPR Jenis 1 : 350x300x36 mm (30%), Jenis 2 : 400x350x39 mm (35%), Jenis 3 : 450x400x45 mm (35%). Hasil kelayakan finansial menunjukkan bahwa industri karet bantalan jembatan dan jalan layang layak didirikan karena memberikan nilai NPV sebesar IDR 14,22 Milyar (bernilai positif atau lebih besar dari nol), IRR sebesar 20,10% (lebih besar dari faktor diskonto 14%), B/C rasio sebesar 1,22 (lebih besar dari 1) dan PBP selama 4,78 tahun. Industri ini sangat sensitif terhadap penurunan harga jual produk dan kenaikan nilai tukar USD terhadap IDR.Kata kunci : konsumsi domestik karet alam, industri hilir karet, bantalan jembatan.

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“…The following mechanical properties of the HDLRB and LRB are reported in Table 1: G and Eb, shear and volumetric compression moduli of the elastomer; Gp and Ep, shear and elastic moduli of the lead; τpy, yield stress of the lead. It should be noted that the lead core is neglected in the calculation of the critical buckling load for LRBs [15]; design values of Pcr and displacement at the collapse prevention limit state (ddC) are also reported in Table 1. In Table 2 initial stiffnesses (i.e.…”

Section: Base-isolated Test Structuresmentioning

confidence: 99%

Residual Load Capacity of Fire-Damaged Rubber Bearings for R.C. Base-Isolated Buildings Subjected to Near-Fault Earthquakes

Mazza¹,

Alesina²

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Stability of Elastomeric and Lead-Rubber Seismic Isolation Bearings

Cited by 91 publications

References 7 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

Kajian Tekno Ekonomi Pendirian Industri Karet Bantalan Jembatan Jenis Karet Alam Dan Karet Kloroprena

Residual Load Capacity of Fire-Damaged Rubber Bearings for R.C. Base-Isolated Buildings Subjected to Near-Fault Earthquakes

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