EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF ULTRA-HIGH PERFORMANCE CONCRETE (UHPC) DOUBLE-LIMB THIN-WALLED PIERS
Ultra high performance concrete is a new type of concrete based on the theory of maximum density.It has super high compressive strength, toughness and durability.In order to study the mechanical properties of ultra-high performance concrete (UHPC) double-limb thin-walled piers, a large scale scale model of l ultra-high performance concrete double limb thin-walled piers (UC-1) and 2 reinforced concrete double limb thin-walled piers (PC-1 and PC-2) was designed and made.Under the action of constant axial force, the quasi-static tests of 3 piers were carried out.The failure characteristics, hysteretic curves and displacement ductility of the pier are obtained.Finally, the numerical simulation of the quasi-static tests of the piers was carried out by using the ABAQUS software, and the failure modes and energy dissipation of the test and calculation results are compared.The failure modes and energy dissipation of the test and calculation results were compared by numerical simulation.The results show that the failure modes of the UC-1 pier and the PC pier are similar.The failure locations are mainly pier bottom, pier top, tie beam and tie beam and the connection of two limbs.The structure mainly presents Bending Failure Mode.For the reinforced concrete pier, the increase of longitudinal reinforcement ratio has remarkable effect on its ductility and bearing capacity.Under the same axial compression ratio, the ultimate bearing capacity of the UC-1 test pier is 91.7% of the PC test pier and the ductility factor is 3~4 times.The hysteretic curve of the super high performance concrete pier is very full.The super high strength concrete can greatly improve the deformation capacity of the pier.
Bridge engineering Double-limb Thin-walled pier Ultra-high performance concrete (UHPC) Ductility performance Seismic performance
Ai-jun Chen Jia-shuai Yao Rong-xin Peng
Central South University of Forestry and Technology, China
国际会议
福州
英文
813-824
2018-11-07（万方平台首次上网日期，不代表论文的发表时间）