1	RECENT ADVANCES IN REINFORCEMENT OF DUCTILE CONCRETE MEMBERS AND SHEARWALLS IN TALL EARTHQUAKE RESISTANT BUILDINGS presented by Brief History of Confinement Reinforcement BauGrid^®Welded Reinforcement Grids (WRG) Research/Approvals Projects Looking into the Future
2	History Research of concrete confinement started before 1928 Triaxial compressive stress behavior⁽¹⁾
3	History Axial stress-strain curves from tri-axial compression tests on concrete cylinders ⁽¹⁾
4	History Conventional confinement by square hoops and circular spirals
5	History
6	Conventional Confinement Reinforcement Problems Labor Intensive Hooks Multiple Layers Dimensionally Inaccurate Premature Failure
7	Conventional Confinement Reinforcement Problems
8	Conventional Confinement Reinforcement Problems
9	Conventional Confinement Reinforcement Problems 90-degree hook failure
10	Conventional Confinement Reinforcement Problems Column beam connection Rebar congestion caused by many layers of conventional hoops and crossties
11	Conventional Confinement Reinforcement Problems Poor fabrication tolerance results in Assembly and installation conflicts Obstruction of passage of vibrator Reduction in the quality of the members Inadequate concrete coverage Inhibiting concrete placement Severe constructability problems
12	Welded Reinforcement Grids (WRG) What is BauGrid^® WRG? Research Approvals Constructability Improvements
13	Welded Reinforcement Grids (WRG)
14	Welded Reinforcement Grids (WRG)
15	BauGrid^® Welded Reinforcement Grids
16	BauGrid^® Welded Reinforcement Grids
17	BauGrid^® Welded Reinforcement Grids
18	BauGrid^® Welded Reinforcement Grids
19	BauGrid^® Construction Systems
20	BauGrid ^® Construction Systems
21	BauGrid^® Construction Systems
22	BauGrid^® Construction Systems
23	BauGrid^® Construction Systems
24	BauGrid^® Construction Systems
25	BauGrid^® Construction Systems
26	BauGrid^® Construction Systems
27	BauGrid^® Construction Systems
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33	Research Since 1988 Five universities U.S. and Canadian national laboratories Concrete members reinforced with BauGrid^® WRG exhibit superior ductility to conventional reinforcement
34	Research
35	Research
36	Research
37	Research
38	Research
39	Research
40	Research
41	Research
42	Research
43	Awards
44	APPROVALS
45	APPROVALS – New General Note
46	APPROVALS
47	Initial Project 17-Story Dormitory at SFSU
48	Recent Projects
49	Recent Projects
50	Recent Projects
51	Recent Projects St. Regis Museum Tower, 42-story in downtown San Francisco
52	Recent Projects 680 Mission St. in San Francisco. 39-story luxury apartment building World's tallest precast concrete building in zone of highest seismicity
53	Recent Projects
54	Recent Projects
55	Comparison of Conventional vs. WRG
56	Comparison of Conventional vs. WRG
57	A Look Into the Future ± 3mm (± 1/8”) = Automation Rapid Parallel Production Offsite/Onsite 620 MPa (90 ksi) = SuperGrid 138 MPa HPC (20 ksi HPC) = Ductile High Performance Concrete BauGrid^® WRG with Lightweight HPC = Ductile Lightweight High Performance Concrete Continuing Constructability Improvement
58	A Look Into The Future Lightweight High Performance Concrete (LHPC) H-Head Testing Longitudinal Steel Lap Length Reduction BauPreForm BauPreClad EnergyReservoirfloor Rapid Bottom-up Pumping
59	A Look Into The Future
60	SUMMARY BauGrid^®Welded Reinforcement Grids (WRG) for Concrete and Masonry Structures BauTech, Inc. www.bautech.com Beams LinkBeams Columns Pilecaps Corbels Planter Fences Ductile CMU Planter Walls Ductile Frames Shearheads Ductile Shearwalls Shearwalls Footings Walls Frames