Tehnički vjesnik, Vol. 28 No. 6, 2021.
Izvorni znanstveni članak
https://doi.org/10.17559/TV-20210712051635
Study on Fatigue Characteristics of Concrete Sleepers with Porous Basalt as the Aggregate
Shougang Huang
; 1. Key Laboratory of Traffic Safety and Control of Hebei Province, Shijiazhuang, Hebei, China, 050043, 2. A.P., School of Traffic and Transportation, Shijiazhuang Tiedao University, Shijiazhuang, Hebei, China, 050043
Jinjie Chen
; School of Traffic Engineering, Hebei University of Water Resources and Electric Engineering, Cangzhou, Hebei, China, 061001
Jianxi Wang*
; Key Laboratory of Roads and Railway Engineering Safety Control, Ministry of Education, Shijiazhuang Tiedao University, Shijiazhuang, Hebei, China,050043
Xiaojun Jiang
; CCCC-SHEC Railway Construction Co., Ltd, 9F, East Tower, State Level Enterprise Technology Center of CCCC Engineering Co., Ltd, No.1699, Shenhe 2nd Road, Chang'an District, Xi'an City, ShanXi, China,710065
Sažetak
Due to the shortage of local materials, porous basalt was used as the coarse aggregate in the prefabrication of sleepers for the Mombasa-Nairobi Railway in Kenya. To study their fatigue characteristics, the sleepers were measured under fatigue loading for their local strain, overall deformation and crack initiation. The methods used include the traditional strain measurement, the sleeper deflection measurement and the 3D optical strain measurement. To be more specific, the traditional strain measurement method was employed to compare the strain-load relation of the sleepers under different cyclic loading times. Deflection variations of the sleepers were taken into consideration to analyze sleeper local defects and the variation law of the constitutive relation for concrete. And the 3D optical non-contact strain measurement method was adopted to monitor the sleeper crack initiation and growth process under fatigue loading and analyze the crack growth law.
Ključne riječi
carrying capacity; concrete sleeper; crack; fatigue characteristics; porous basalt
Hrčak ID:
264039
URI
Datum izdavanja:
7.11.2021.
Posjeta: 818 *