Year 2018, Volume 19, Issue 4, Pages 805 - 814 2018-12-31

Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach

Sertaç TUHTA [1]

84 199

The “Walled Obelisk” is a 32.77-meter high, 2x2 meter mean square, rough-cut limestone monument that is becoming thinner to the four-sided hill. This monument is in a very sensitive seismic region of the World-Istanbul and remains intact from the time of its construction (approximately tenth century) to the present despite all seismic activity during that time. The current study extracts and investigates a mathematical model of the monument, which reveals that support of the structure incorporates a “natural seismic isolator” that demonstrates behavior similar to current used lead-core rubber-bearings isolator (LRB). The total height of the “natural seismic isolator” is 3.44 m. and consists of three–steps of rough-cut limestone and a massive marble stone that forms four sliding surfaces bonded with Horasan mortar. The components of the “natural seismic isolator” form four sliding surfaces and appear to function similar to LRB’s combined layers of steel plates and hard rubber. The massive marble stone appears to function like the lead cylinder core of the LRB. The “natural seismic isolator” demonstrates fully plastic behavior and differs from the LRB by maintaining the monument’s upper part in equilibrium during earthquake excitation, which also varies near zero equilibrium. During this study’s comparison of the isolator’s use of the expression, “similar” is frequent used in this meaning, and the comparison uses a fixed base model of the monument that cannot reciprocate during recovery from earthquakes over the 1000-year history. The proposed model of “natural seismic isolation” from historical experience (for this monument, 1000 years), suggests that the easily constructed natural isolator requires no special maintenance, and is suitable for modern structures in seismic regions.
Walled Obelisk, Dynamic Analysis, Seismic Protection, Historical Structures
  • [1] Kasimzade A.A., (2006), Fuzzy Finite Element Modeling of Structures Under Earthquake Action, The 5th International Symposium on Intelligent Manufacturing System, Istanbul, Turkey, p.10.
  • [2] Kasimzade A.A., Structural Dynamics: Theory and Application to Earthquake Engineering (is included education and dynamic analysis programs CD), Istanbul, Beta Publication, (First edition 1998) Second edition, 2005, p.527. (ISBN 975-511-381-9)
  • [3] Kasimzade A.A., Finite Element Method: Foundation and Application to Earthquake Engineering (is included education and finite element analysis programs CD) , Istanbul, Beta Publication , (First edition 1997) Second edition, 2005, p.827. (ISBN 975-511-379-7)
  • [4] Kasimzade A.A and Tuhta S., (2004), “Estimation of Sensitivity and Reliability Base Isolated Building under Earthquake Action”, International Symposium on Network and Center-Based Research for Smart Structures Technologies and Earthquake Engineering (SE’04), July 6-9, Osaka, Japan
  • [5] Maria Rosa Valluzzi, Luigia Binda , Claudio Modena, (2005), Mechanical behavior of historic masonry structures strengthened by bed joints structural repointing, Construction and Building Materials 19, 63–73[6] Turkish Earthquake Code (2018)
  • [7] Naeim F., Kelly J.M., (1999), Design of Seismic isolated Structures, John Wiley & Sons Pub.[8] Örme Dikilitaş, (2005), Istanbul Metropolitan Municipality Project Department, History of Environmental Protection Administrations, Building Survey, Restitution and Restoration Projects
  • [9] Örme Dikilitaş, (2005), Istanbul Metropolitan Municipality Project Department, History of Environmental Protection Administrations, Material Reports
  • [10] Skinner R.I.,Robinson W.H., McVerry G.H., (1993), An Introduction to Seismic Isolation, John Wiley & Sons Pub.
  • [11] UniformBuilding Code (UBC), (1997), International Conference of Building Officials, Volume 2, Structural Engineering Design Provisions, Whittier, CA
Primary Language en
Subjects Engineering
Journal Section Articles
Authors

Author: Sertaç TUHTA

Dates

Publication Date: December 31, 2018

Bibtex @research article { estubtda515778, journal = {Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering}, issn = {2667-4211}, address = {Eskişehir Teknik Üniversitesi}, year = {2018}, volume = {19}, pages = {805 - 814}, doi = {10.18038/aubtda.411654}, title = {Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach}, key = {cite}, author = {TUHTA, Sertaç} }
APA TUHTA, S . (2018). Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, 19 (4), 805-814. DOI: 10.18038/aubtda.411654
MLA TUHTA, S . "Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach". Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 19 (2018): 805-814 <http://dergipark.org.tr/estubtda/issue/42733/515778>
Chicago TUHTA, S . "Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach". Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 19 (2018): 805-814
RIS TY - JOUR T1 - Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach AU - Sertaç TUHTA Y1 - 2018 PY - 2018 N1 - doi: 10.18038/aubtda.411654 DO - 10.18038/aubtda.411654 T2 - Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering JF - Journal JO - JOR SP - 805 EP - 814 VL - 19 IS - 4 SN - 2667-4211- M3 - doi: 10.18038/aubtda.411654 UR - https://doi.org/10.18038/aubtda.411654 Y2 - 2018 ER -
EndNote %0 Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach %A Sertaç TUHTA %T Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach %D 2018 %J Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering %P 2667-4211- %V 19 %N 4 %R doi: 10.18038/aubtda.411654 %U 10.18038/aubtda.411654
ISNAD TUHTA, Sertaç . "Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach". Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 19 / 4 (December 2019): 805-814. https://doi.org/10.18038/aubtda.411654
AMA TUHTA S . Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering. 2018; 19(4): 805-814.
Vancouver TUHTA S . Natural Seismic Protection Properties of Historical “Walled Obelisk” Structure in Istanbul: Modeling-Numerical Approach. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering. 2018; 19(4): 814-805.