TY - GEN
T1 - Seismic performance of high-strength-concrete hollow bridge piers under multi-directional loading
AU - Burgueño, R.
AU - Liu, X.
AU - Hines, E. M.
PY - 2010
Y1 - 2010
N2 - High-strength-concrete (HSC) offers the potential of transforming seismic design concepts by harnessing the enhanced capacities associated with axial load, flexural compression zone confinement and web shear crushing of wall webs. Recent research has demonstrated that structural walls can exhibit dependable ductile behavior before being ultimately limited by web crushing shear failures and that this inelastic capacity can be further improved with HSC. The performance of hollow square HSC bridge piers under multi-directional was thus evaluated to help define limits that satisfy the noted performance requirements. Two 1/4-scale units, with design concrete compressive strengths of 34 and 138 MPa (5 and 20 ksi), were subjected to diagonal and multi-directional cyclic loading, respectively. The 3D inelastic web crushing behavior and the degradation of shear stiffness and energy dissipating capacity was evaluated. Results indicate that the mixed flexure-shear cracking mode under multi-directional loading causes rapid shear stiffness degradation and accelerates the subsequent web crushing failure.
AB - High-strength-concrete (HSC) offers the potential of transforming seismic design concepts by harnessing the enhanced capacities associated with axial load, flexural compression zone confinement and web shear crushing of wall webs. Recent research has demonstrated that structural walls can exhibit dependable ductile behavior before being ultimately limited by web crushing shear failures and that this inelastic capacity can be further improved with HSC. The performance of hollow square HSC bridge piers under multi-directional was thus evaluated to help define limits that satisfy the noted performance requirements. Two 1/4-scale units, with design concrete compressive strengths of 34 and 138 MPa (5 and 20 ksi), were subjected to diagonal and multi-directional cyclic loading, respectively. The 3D inelastic web crushing behavior and the degradation of shear stiffness and energy dissipating capacity was evaluated. Results indicate that the mixed flexure-shear cracking mode under multi-directional loading causes rapid shear stiffness degradation and accelerates the subsequent web crushing failure.
UR - https://www.scopus.com/pages/publications/84867179201
M3 - Conference contribution
AN - SCOPUS:84867179201
SN - 9781617388446
T3 - 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
SP - 3372
EP - 3381
BT - 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
T2 - 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
Y2 - 25 July 2010 through 29 July 2010
ER -