Early Age Shrinkage and Mechanical Effect of Ultra-High-Performance Concrete Composite Deck: A Case Study with In Situ Test and Numerical Simulation

• DOI: 10.3390/ma15103628
• Publication Date: 2022-05-20T04:18:11Z
• Authors: Zhiguo Ma; Yue Li; Zhensheng Cao; Shaoqiang Zhang; Shengjun Hou; Jilin Liu; Xin Ruan
• Keywords: Shrinkage; Bridge deck

For the Honghe Bridge project located in Yunnan Province, Southwest China, a steel/ultrahigh-performance concrete (UHPC) composite deck is used suspension bridge with 700 m main span, and steel stud connectors are 50 mm-thick UHPC layer. To investigate shrinkage behavior of relevant influence, situ time-dependent strain measured continuously, within 20-day curing time, material summarized based on test results. This paper proposes prediction model for which refined from widely B3 normal material, parameter values modified optimized by experimental comparison. Combining numerical finite element analysis deck, detailed mechanical state structural parts studied. practical construction, simulation results indicate that small thickness above weak bond strength can influence eventual performance greatly. In discussion stress distribution at different locations potential crack edge corner UHPC-steel interface damage connector around also indicated.