Öz
Binaların taban izolasyonunda kullanılan elastomer yatağın analizinde zayıf kayma rijitliğinin etkisi çok önemlidir. Özellikle, burkulma yükü düşük olup P-∆ etkisi kayma deformasyonlarının ihmal edildiği standart kolonlara nazaran önemlidir. Bu makalede, elastomerik izolasyon yatakların P-∆ etkisini işlemek için hem kayma hem de eğilme deformasyonlarını nazara alan basit bir mekanik model önerilmiştir. Model parametrelerinin yeterli seçimi ile basitleştirilmiş model hem statik hem de dinamik durumlarda gerçek modelle iyi uyum göstermektedir. Tabii kauçuktan mamul yataklar için deney sonuçları tatbik edildiğinde modelin, eksenel yükün dinamik direngenlik üzerine etkileri, sönümleme faktörü ve taşıyıcı yüksekliğinde azalması üzerine doğru sonuçlar verdiği bulunmuştur. Ayrıca, basitleştirilmiş model kullanılarak elastomerik yatakların ileri-burkulma çalışması da takdim edilmiştir.
Anahtar Kelimeler
Kaynakça
- A. G. TARICS, 1984, “The implementation of base isolation for the foothill communities law and justice center”, Report to the National Science Foundation and the County of San Bernardino. Reid and Tarics Associates, San Francisco.
- A. N. GENT, 1964, “Elastic stability of rubber compression springs”, J. Mech. Engng Sci. 6, 318-326.
- Ashkan – KhodaBandehLou, 1999, “Deformation and sinking of multistorey buildings system and especially skeleton frame structure”, Scientific – practical conference.
- Ashkan – KhodaBandehLou, 2000 “Design of skeleton frame multistorey buildings, in seismology area”, Scientific – practical conference.
- Ashkan – KhodaBandehLou, 2002, “Design of ribbed plates, supported by the columns”, Works Scientific – research institute of construction and architecture.
- Ashkan – KhodaBandehLou, 2003a “Design of the beamless (flat) floor slabs studding their joint work with the skeleton frame concrete multistorey buildings” Design of the scientific works on mechanic.
- Ashkan – KhodaBandehLou, 2003b, “Design of vertical loading of skeleton frame buildings with beamless floor slabs" Technical Sciences.
- Ashkan – KhodaBandehLou, 2003c, “Investigation of the work of beam and beamless floor slabs of multistoreyed buildings, erected in seismology area” II International Scientific – practical conference. The significance of weakening of influence of emergency situations in stable development of the country.
- Ashkan – KhodaBandehLou, 2005, “The investigation of the beam and beamless (flat) floor slabs in the multistoreyed buildings”, Technical journal.
- Ashkan – Safar – KhodaBandehLou, 2006 “The investigation of the beam and griderless floor slabs in the multistorey buildings”, Scientific works.
- J. A. HARINGX, 1948-1949, On highly compressive helical springs and rubber rods and their applications to free mountings--Parts I, II and III. Philips Research Reports.
Öz
The effect of weak shear rigidity is important in the analysis of elastomeric bearings used for base isolation of buildings. In particular, the buckling load is low and the P-Δ effect is significant as compared to standard columns neglecting shear deformations. In this paper, a simple mechanical model accounting for both shear and flexural deformations is proposed to treat the P-Δ effect of elastomeric isolation bearings. With adequate choice of the model parameters, the simplified model agrees very well with an exact model in both static and dynamic cases. When applied to the experimental results for some natural rubber bearings, the model is found to describe with good accuracy the effects of axial load on the dynamic stiffness, the damping factor and the height reduction of bearings. A brief study of the post-buckling behaviour of elastomeric bearings using the simplified model is also presented.
Anahtar Kelimeler
Kaynakça
- A. G. TARICS, 1984, “The implementation of base isolation for the foothill communities law and justice center”, Report to the National Science Foundation and the County of San Bernardino. Reid and Tarics Associates, San Francisco.
- A. N. GENT, 1964, “Elastic stability of rubber compression springs”, J. Mech. Engng Sci. 6, 318-326.
- Ashkan – KhodaBandehLou, 1999, “Deformation and sinking of multistorey buildings system and especially skeleton frame structure”, Scientific – practical conference.
- Ashkan – KhodaBandehLou, 2000 “Design of skeleton frame multistorey buildings, in seismology area”, Scientific – practical conference.
- Ashkan – KhodaBandehLou, 2002, “Design of ribbed plates, supported by the columns”, Works Scientific – research institute of construction and architecture.
- Ashkan – KhodaBandehLou, 2003a “Design of the beamless (flat) floor slabs studding their joint work with the skeleton frame concrete multistorey buildings” Design of the scientific works on mechanic.
- Ashkan – KhodaBandehLou, 2003b, “Design of vertical loading of skeleton frame buildings with beamless floor slabs" Technical Sciences.
- Ashkan – KhodaBandehLou, 2003c, “Investigation of the work of beam and beamless floor slabs of multistoreyed buildings, erected in seismology area” II International Scientific – practical conference. The significance of weakening of influence of emergency situations in stable development of the country.
- Ashkan – KhodaBandehLou, 2005, “The investigation of the beam and beamless (flat) floor slabs in the multistoreyed buildings”, Technical journal.
- Ashkan – Safar – KhodaBandehLou, 2006 “The investigation of the beam and griderless floor slabs in the multistorey buildings”, Scientific works.
- J. A. HARINGX, 1948-1949, On highly compressive helical springs and rubber rods and their applications to free mountings--Parts I, II and III. Philips Research Reports.
Ayrıntılar
| Diğer ID | JA47ER66ST |
|---|---|
| Bölüm | Makaleler |
| Yazarlar | |
| Yayımlanma Tarihi | 1 Mart 2012 |
| Yayımlandığı Sayı | Yıl 2012 Cilt: 27 Sayı: 1 |