Year: 2024
Type: article
Abstract: For steel-HSC (high-strength concrete) composite structures, the interface performance of steel and high-strength concrete is the key to determine the working mechanism of the two. To this end, the paper conducted experimental and theoretical research on the dynamic mechanical properties of the steel-HSC interface with shear studs under impact loads. The composite specimens under stress waves were experimentally studied using a split Hopkinson bar system, and the complex stress intensity factor at the crack tip of the composite specimen was obtained by an experimental numerical method. The research results showed that: 1) Under impact loads, the BNSCB specimen was not only prone to stress concentration at the shear studs, but also had a certain degree of inhibitory effect on the propagation of interface cracks. 2) When using a three-dimensional model to solve the stress intensity factor of the specimen, the average values of K1 and K2 along the thickness direction were taken as the numerical solution of the BNSCB specimen parameter K1 and K2. 3) The maximum and average velocities of the interface crack propagation of the BNSCB specimen increased with the increase of the high-strength concrete strength. 4) With the increase of the high-strength concrete strength, the fracture parameter K1 value at the interface crack tip of the BNSCB specimen would increase.
Source: Industrial Construction
Authors: Haopeng LAI, Hao QIU, Feiyu LIAO, Chao XU, Ruisheng ZHENG, Jianjun LIU, Yujin QIU
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405155342