Current　suspen-domes　use　loop　cables　which　are　key　elements　and　carry　large　tensions.　Loop-free　suspen-dome　was　proposed　for　improving　the　collapse　resistance　and　reducing　cable　tensions.　The　collapse　resistance　of　loop-free　suspen-dome　has　not　been　verified.　In　this　paper,　analysis　on　dynamic　response　of　both　current　suspen-dome　and　loop-free　suspen-dome　induced　by　sudden　cable　or　strut　failure　is　performed　to　investigate　the　collapse　resistance.　Under　the　loaded　state,　cables　or　struts　were　suddenly　removed　from　the　structure　to　simulate　cables　or　struts　failure.　Th　residual　bearing　capacity　of　the　structure　after　the　rupture　was　also　analyzed.　It　is　concluded　that　collapse　resistance　of　the　loop-free　suspen-dome　is　good.　Failure　mode　of　the　loop-free　suspen-dome　is　proportionate.　The　effect　on　the　loop-free　suspen-dome　due　to　initial　failure　grows　proportionately　along　with　the　quantity　of　failed　members.　It　also　turns　out　that　cables　in　the　loop-free　suspen-dome　are　relatively　independent.　Only　the　failed　cable　loses　tension,　other　cables　still　remain　in　tension.　It　is　also　found　that　the　most　important　cable　or　strut　in　the　loop-free　suspen-dome　is　in　the　outermost　layer　of　the　cable-strut　system.　More　concern　should　be　shown　to　the　cables　and　struts　in　the　outermost　layer.