2013-4-19 3.Bending members 3.Bending members arallel Strand Lumber girder 3.Bending members 3.Bending members Bending failure Lateral torsional buckling Shear failure ●Notch failure ●Bearing failure Excessive deflections 3.Bending members 园 3.Bending members 园 (1)Bending failure in compression (1)Bending failure in tension Most likely failure mode ●Brittle(脆性的) Combnationofshear.atouh 1 tension fracture is the initiating moc 人1 42013-4-19 4 3. Bending members 3. Bending members Parallel Strand Lumber girders 3. Bending members 3. Bending members Bending failure Lateral torsional buckling Shear failure Notch failure Bearing failure Excessive deflections 3. Bending members (1) Bending failure in compression Only likely for very high grade material Benign（良性的） failure mode 3. Bending members (1) Bending failure in tension Most likely failure mode Brittle（脆性的） Combination of tension and shear, although tension fracture is the initiating mode