Dynamic compression behavior of ultra-high performance concrete with hybrid polyoxymethylene fiber and steel fiber oleh Jia-Xiang Lin, Jia-Ying Su, Hong-Shu Pan, Yu-Qi Peng, Yong-Chang Guo, Wei-Shan Chen, Xiao-Long Sun, Bing-Xiang Yuan, Guo-Tao Liu, Xue-Wei Lan