It　is　common　to　precast　the　ultra-high-performance　concrete　(UHPC)　arch　rib　segments　and　to　assemble　them　through　dry　joints,　while　the　shear　behaviors　of　the　dry　joints　are　of　great　concern　for　the　safety　of　the　whole　structure.　In　this　paper,　an　experimental　study　on　five　dry　joint　specimens　was　carried　out　to　investigate　their　shear　behaviors,　and　to　lay　a　foundation　for　further　engineering　applications　of　this　bridge　type.