Council on Tall Buildings. and Urban Habitat ADVANCES IN SEISMIC DESIGN AND CONSTRUCTION IN INDONESIA. CTBUH 2014 Shangai Conference

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2 Davy Sukamta Principal, Davy Sukamta & Partners Structural Engineers President,Indonesian Society of Civil&Structural Engineers ADVANCES IN SEISMIC DESIGN AND CONSTRUCTION IN INDONESIA

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4 Recent major earthquakes, Western Indonesia Courtesy Masyhur Irsyam Aceh Earthquake Mw=9.1 (December, 2004) Nias Earthquake Mw=8.6 (March, 2005) Why does the current code require improvements? Padang Earthquake Mw=7.6 Jambi EarthquakeMw= To considers (Sept, recent 2009) (Oct, 2009) great earthquakes in Indonesia Tasik Earthquake Mw=7.4 (Sept, 2009) Yogya Earthquake Mw=6.3 (May, 2006) USGS ISEMS, 7-8 November 2013

5 Damage to engineered structure

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7 Advances in Seismic Design And Construction for High-Rise Buildings In Indonesia 1. Issuance of New Seismic Resistant Design Code (2012) 2. Use of Nonlinear Pushover Analysis and Performance-Based Seismic Design for High-Rise Buildings In Design Office 3. Application of Base Isolation System for High-Rise Buildings

8 Ref.Prof.Masyhur Irsyam UPDATING THE CODE IBC 2011 ASCE 7-05 ASCE 7-10

9 SNI-2002 What are the changes? SNI maps for 500-yr EQ and 3 for 2500-yr EQ a.pga b.spectra at 0.2 sec c.spectra at 1.0 sec

10 M w for Seismic hazard map 2010 ( Irsyam et al,2010)

11 ( Irsyam et al,2010)

12 Many provisions of ASCE 7-10 have been included in the SNI:

13 New Provisions Seismic Design Categories Redundancy Factors Generating Design Response Spectrum Vertical Irregularities Horizontal Irregularities

14 The Pakubuwono Signature - 50-story 252-M high - RC core wall & outrigger - First building analyzed with PBSD method in Indonesia - Structural Engineer: Davy Sukamta & Partners - Completed in 2014 The use of PERFORMANCE-BASED SEISMIC DESIGN

15 PAKUBUWONO SIGNATURE Designed in accordance with PEER-TBI Guidelines Floor-to-floor 3.85m RC Core wall and Outriggers as lateral resisting system Wall thickness 650 mm Outrigger Beam 3-story deep Expected inelastic action at coupling beams, base of core wall, both ends of outrigger columns

16 Basement structure is included Model is fixed at the mat foundation level SSI is not included core wall hinge zones 3-D Nonlinear Model

17 CHICHI RECORD 3-D VIEW Y-AXIS X-AXIS

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23 Earthquakes Can Be Catastrophic u Loma Prieta 1989 $7 Billion u $450 Million per Second u Northridge $30 Billion u $2 billion per second! u Kobe $150 - $200 Billion u And Very Expensive $7.5 billion per second!!

24 Fundamental principle of base isolation: modify the response of the building so that the ground can move below the buildings without transmitting these motion into the building.

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26 Plan of Base Isolators HDRB 16 nos HDRB HH130-6R 24 nos HDRB HH150-6R

27 Courtesy: Bridgestone,Japan

28 Lateral Resistant System: RC Corewall+Outrigger and Seismic Steel Moment Frame, with HDRB

29 Structural Scheme Outrigger Floor Shear Link Outrigger Beam

30 Outrigger Column Nomor RC core wall Outrigger Periode Getar Base-isolated Structure Nomor Periode Getar Faktor Partisipasi Mass (%) Ragam (detik) X-trans Y-trans Rz-rotn Fixed-base Structure Nomor Periode Getar Faktor Partisipasi Mass (%) Ragam (detik) Ragam (detik) X-trans Y-trans Rz-rotn Dynamic Characteristic of Based-Isolated vs Fixed-Base Structure sec sec

31 Performance of Seismically Isolated Structure vs Conventional Structure R=2.0 C D =2.0 R=6.0 C D =5.0

32 Seismic design detailings are put in place with strict supervision to the works, starting from foundation: - Confinement of pile - Diameter of bend - Length of hook

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35 Typical Floor Plan 27-story Base-isolated structure PURI MATAHARI TOWER JAKARTA

36 7 nos.ht090x6r 9 nos.ht120x6r 10nos.HT130x6R 12nos.HT160x6R Base Isolation Plan

37 Base-isolated Structure Area Tower 1.899sec Mode Periode 3.755sec Fixed-based Structure Modal Participating Mass Ratios (%Mass) (detik) Ux-Trans Uy-Trans Rt-trans

38 ETABS Model BM Diagram of Core Wall

39 Fixed-Base Isolated Base V=77436 kn V=12906 kn Non-linear Push-over Analysis V=39946 kn V=19973 kn Direction

40 Fixed-Base Isolated Base Non-linear Push-over Analysis V=77436 kn V=12906 kn Direction V=39946 kn V=19973 kn

41 Base Shear (x1000 KN) Base Shear vs Displacement (PUSH-1) Base Shear vs Displacement (PUSH-2) Displacement (m) ISOLATOR DISPLACEMENT ROOF DISPLACEMENT Base Shear (x1000 KN) ISOLATOR DISPLACEMENT ROOF DISPLACEMENT Displacement (m)

42 Performance of Seismically Isolated Structure vs Conventional Structure Fully Operational R=2.0 C D =2.0 R=6.0 C D =5.0 Fema 356 IO Fema 356 LS Fema 356 CP

43 The Puri Matahari Tower under construction

44 News / Articles / CTBUH2014 THANK YOU