STRUKTUR BETON 1 PERTEMUAN 2 DASAR PERENCANAAN BALOK

STRUKTUR BETON 1 PERTEMUAN 2 DASAR PERENCANAAN BALOK BETON BERTULANG Oleh : Arwan Apriyono

Allowable Stress – WSD (ASD) Examples: WSD � Actual loads used to determine stress � Allowable stress reduced by factor of safety Ultimate Strength – (LRFD) � Loads increased depending on type load g Factors: DL=1. 4 LL=1. 7 WL=1. 3 U=1. 4 DL+1. 7 LL � Strength reduced depending on type force f Factors: flexure=0. 9 shear=0. 85 column=0. 7 Structures II University of Michigan, TCAUP Slide 2/26 Ultimate Strength

Item Perencanaan Hal yang perlu diperhatikan pada perencanaan balok beton bertulang : a. Kombinasi beban yang ada pada struktur b. Analisis struktur (Menghasilkan Mu dan Vu) c. Properties Beton dan Baja Tulangan (f’c dan fy) d. Konsep Perencanaan Balok Beton Bertulang

Kombinasi Beban

Analisis Struktur ANALISIS STATIS TERTENTU ANALISIS STATIS TAKTENTU DAPAT DIGUNAKAN BANTUAN SOFTWARE: AXIS, ANXIS, SAP, ETAB ETC

Properties Beton Strength Measurement �Compressive strength › 12”x 6” cylinder › 28 day moist cure › Ultimate (failure) strength Photos: Source: Xb-70 (wikipedia) Structures II University of Michigan, TCAUP Slide 7/26

Properties Beton

Properties Baja

Properties Baja KURVA HUBUNGAN TEG-REG BAJA

Properties Baja UKURAN BAJA TULANGAN

Konsep Perencanaan

Failure Modes � No Reinforcing › Brittle failure � Reinforcing Source: Polyparadigm (wikipedia) < balance › Steel yields before concrete fails › ductile failure � Reinforcing = balance › Concrete fails just as steel yields � Reinforcing > balance › Concrete fails before steel yields › Sudden failure Structures II University of Michigan, TCAUP Slide 16/26

Konsep Perencanaan