CVE40002 Structural Design of Low Rise Buildings CVE40002 - Structural Design of Low Rise Buildings Week 8: Design of residential slabs and footings to AS 2870 Dr Scott Menegon Semester 1, 2023 CVE40002 - Structural Design of Low Rise Buildings - Week 8 Lecture Lecture overview 1. Foundation systems 2. Introduction to AS 2870 and site classification 3. Foundation system design to AS 2870 4. Tutorial 8 worked solution 5. Assignment 2 SJM Additional references/reading: · AS 2870 Semester 1, 2023 SWIN BUR · NE * SWINBURNE UNIVERSITY OF TECHNOLOGY SWIN BUR · NE . WINILEE UNEVERSITY OF TEO NOLOCH Semester 1, 2023 2 Dr Scott Menegon 1 of 21
CVE40002 Structural Design of Low Rise Buildings Semester 1, 2023 CVE40002 - Structural Design of Low Rise Buildings - Week 8 Lecture SWIN BUR · NE * SWINBURNE UNIVERSITY OF TECHNOLOGY 1. Foundation systems Semester 1, 2023 CVE40002 - Structural Design of Low Rise Buildings - Week 8 Lecture SWIN BUR . NE Foundation systems UNMUSITY OF · Why do we have foundations? · Transfer all forces acting on the structure, e.g., gravity, wind or earthquake actions, into the ground · | Ensure the building can withstand (without damage) the reasonably expected ground movements forritss respective site conditions (e.g., ground movement due to reactive clays under the building) Very important in Victoria where we have a lot reactive clay soils (compared to Perth that has a lot of non-reactive sand sites) · Reactive clay sites are where the clays are "reactive" and they change in volume (i.e., expand and contract) with moisture changes, which results in heave of the soil Slab length Slab length · Movement due to reactive clay soils is the primary failure reason for residential footings (a) Centre heave mound [/-W,le- Isee Figure F2 Wie e (b) Edge heave FIGURE F1 IDEALIZED MOUND SHAPES TO REPRESENT DESIGN GROUND MOVEMENT (WALSH METHOD) SJM Semester 1, 2023 4 Dr Scott Menegon 2 of 21
CVE40002 Structural Design of Low Rise Buildings Semester 1, 2023 CVE40002 - Structural Design of Low Rise Buildings - Week 8 Lecture SWIN BUR . NE Typical residential footing system TECHNOLOCA · Raft slab is typical footing system in a two- storey residential building · We have concrete beams in two-directions, which create a grillage to span over any soft spots in the soil or voids that are created · We have concrete slab panels that span two ways between adjacent footing beams to overcome soil movement Green beams in ‘left-right' direction EB3 EB1 1B2 VIBY 131 CONT IN JOUIS RASING WEEP NOLES 0 100E CTS. REBATE ITYRI REFER PLAN FOR S.AB THICKNESS 02mm WATERPROOF MIHIRNE SAND MASE. TYPEAL. REPER SLAB PLAN WHAT BOTTOM EB1 IB1 EB4 Typical slab panel spanning to adjacent beams on each side Iscas ICON IB1 IB1 GARAGE IB1 AB2 1 IB1 182 1B1 JB2 IB1 IB1 MB1 /B 1 05 GARAGE EB2/ EB2 EB2 PETER AS SCHEDULED. REFER REFER TO EB1 DETAIL IB1 DETAIL TYPICAL EDGE BEAM & STIFFENING BEAM