RASIO INELASTIS STRUKTUR GEDUNG TIDAK SIMETRIS HORIZONTAL AKIBAT GETARAN GEMPA
Abstract
Penyebab utama terjadinya torsi pada bangunan selama getaran gempa terjadi ialah akibat tidak simetrisnya distribusi massa dan kekakuan. Elemen penahan lateral harus mampu menahan berbagai jenis karakterisik gempa yang terjadi. Kurva backbone (backbone curve) dan gabungan kurva histeresisnya (hysteretic curve) menggambarkan model serbaguna dari perilaku siklik struktur beton bertulang dan memodelkan perilaku penurunan regangan selama pemberian beban. Parameter pembentuk kurva backbone diantaranya ialah kapasitas rotasi plastis. Pada penelitian ini akan dilakukan studi parametrik pada model bangunan dengan elemen penahan lateral berupa dinding geser dengan variasi eksentrisitas kekakuan yang dipengaruhi kapasitas rotasi plastis secara 2D untuk melihat rotasi struktur melalui tinjauan rasio simpangan inelastis yang terjadi pada dinding fleksibel (flexible wall) dan dinding yang lebih kaku (stiff wall). Perbedaan simpangan pada kedua dinding (fleksibel dan kaku) meyebabkan rotasi pada lantai. Struktur tersebut akan dianalisis dengan program Ruaumoko dalam kondisi inelastis dengan metode analisis time history dan diberikan eksitasi gempa. Rasio simpangan inelastis pada sisi kaku dapat mencapai 27% dan pada sisi fleksibel dapat mencapai 20%.
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Anagnostopoulos, S. A. et al., 2010, An Answer to an Important Controversy and The Need for Caution When Using Simple Models to Predict Inelastic Earthquake Response of Buildings With Torsion. Earthquake Engineering Structure Dyn 39: 521-540.
Anonim, 2005, International Code Council, Inc. Illinois: Building Officials and Code Administrators International, Inc.
Anonim, 2012, Tata Cara Perencanaan Ketahanan Gempa untuk Struktur Bangunan Gedung dan Non Gedung. Jakarta: Badan Standarisasi Nasional.
Beyer, K., & Bommer, J. J., 2007, Selection and Scaling of Real Accelerograms for Bi-Directional Loading: A Review of Current Practice and Code Provisions. Journal of Earthquake Engineering, 11 , 13-45.
Carr, A.J. (2008). RUAUMOKO-Inelastic Dynamic Analysis Program. Departement of Civil Engineering, University of Canterbury, Chirstchurc, New Zealand.
Chopra, A.K., 2002, Dynamics of Structures: Theory and Applications to Earthquake Engineering, 2nd ed., Prentice Hall, Upper Saddle River, N.J., 844pp.
De Stefano M, & Pintucchi B., 2002, A model for analyzing inelastic seismic response of plan-irregular building structures. Proceedings of the 15th ASCE Engineering Mechanics Conference, New York.
De Stefano M, Marino EM, Rossi PP, 2006, Effect of overstrength on the seismic behaviour of multi-storey regularly asymmetric buildings. Bull Earthquake Eng 4(1):23–42
De Stefano, M., & Pintucchi, B., 2008, A Review Of Research On Seismic Behaviour Of Irregular Building Structures Since 2002. Bull Earthquake Eng 6 , 285-308.
FEMA 451B, 2007, NEHRP Recomenden Provision for New Building and Other Structure: Training and Instructional Materials.
Gavin, H. P., 2014, Vibration of Single Degree of Freedom Systems. CEE Structural Dynamics. Department of Civil Engineering. Duke University.
Haselton, C. B., Liel, A. B., Lange, S. T., & Deierlein, G. G., 2008, Beam-Column Element Model Calibrated for Predicting Flexural Response Leading to Global Collapse of RC Frame Buildings. Berkeley: Pacific Earthquake Engineering Research Center.
Katsanos, E. I., Sextos, A. G., & Manolis, G. D., 2010, Selection of Earthquake Ground Motion Records: A State-Of-The-Art Review. Soil Dynamics and Earthquake Engineering 30, 157–169.
Kalkan, E., Kunnath, S. K., 2006, Effects of Fling Step and Forward Directivity on Seismic Response of Buildings. Earthquake Spectra 22, 367-390.
Kunnath SK, Erduran E, Chai YH, Yashinsky M., 2008, Effect of Near Fault Vertical Ground Motions On Seismic Response of Highway Overcrossings. J Bridge Engineering ASCE; 13(3):282-90.
Lucchini, A. et al., 2009, Seismic Behavior of Single-Story Asymmetric-Plan Buildings Under Uniaxial Excitation. Earthquake Engineering Structure Dyn 38, 1053-1070.
Marusic, D., & Fajfar, P., 2005, On The Inelastic Seismic Response of Asymmetric Buildings Under Bi-axial Excitation. Earthquake Engineering Structure Dyn 34, 943-963.
Paulay, T., 1998, Torsional Mechanisms in Ductile Building Systems. Earthquake Engineering Structue Dyn 27, 1101-1121.
Pawirodikromo, W., 2012, Seismologi Teknik & Rekayasa Kegempaan. Yogyakarta: Pustaka Pelajar.
Pacific Earthquake Engineering Research, 2008, PEER NGA Database, available at http://peer.berkeley.edu/nga/.
Peruš I, & Fajfar P, 2002, On Inelastic Seismic Response of Asymmetric Single-Storey Structures Under Bi-Axial Excitation. Proceedings of the third European workshop on the seismic behaviour of irregular and complex structures, CD ROM. Florence.
Peruš I, & Fajfar P., 2005, On the inelastic torsional response of single-storey structures under bi-axial excitation. Earthquake Engineering Structure Dyn 34:931–941
Pintucchi, B. et al., 2005, Numerical Verification of The Effectiveness of The “Alpha Method” for The Estimation of The Maximum Rotational Response of Eccentric Systems. Proceedings of the 4th European workshop on the seismic behaviour of irregular and complex structures, CD ROM. Thessaloniki, August 2005
Roy, R., & Chackroborty, S., 2013, Seismic Demand of Plan-Asymmetric Structures: A Revisit. Earthquake Engineering and Engineering Vibration 12, 99-117.
Sommer, A., & Bachmann, H., 2005, Seismic Behavior of Asymmetric RC Wall Buildings: Principles and New Deformation-Based Design Method. Earthquake Engineering Structure Dyn 34, 101-124.
Somerville, P., 2003, Magnitude Scaling of The Forward Rupture Directivity Pulse in Near-Fault Ground Motions. URS Group Inc. Award Number: 01HQGR0048.
Stathopoulos KG, Anagnostopoulos SA, 2002, Inelastic Earthquake Induced Torsion in Buildings: Results and Conclusions from Realistic Models. Proceedings of the 12th European conference on earthquake engineering, CD ROM. London, September 2002.
Stathopoulos KG, Anagnostopoulos SA, 2003, Inelastic Earthquake Response of Single-Story Asymmetric Buildings: An Assessment of Simplified Shear-Beam Models.EarthqEng Struct Dyn32:1813–1831
Stathopoulos, K. G., & Anagnostopoulos, S. A., 2004, Earthquake Induced Inekastic Torsion In Asymmetric Multistory Buildings. World Conference on Earthquake Engineering 13, 558.
Stathopoulos, K. G., & Anagnostopoulos, S. A., 2005, Inelastic Torsion of Multistorey Buildings Under Earthquake Excitations. Earthquake Engineering Structure Dyn 34: 1449-1465.
Trombetti T. L., & Conte J. P., 2005, New Insight Into A Simplified Approach to Seismic Analysis of Torsionally Coupled One-Story, Elastic System. J Sound Vibrat 286:265-312.
DOI: https://doi.org/10.30743/but.v13i3.538
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