當建築物之底層柱遭受破壞而喪失其支撐力時,結構可能會引發大規模的漸進式崩塌反應。本文以一棟經耐震設計之10層樓RC建築,並將內部填充磚牆及RC開孔外牆等非結構牆納入分析模型中。結構模型中考量之內部填充磚牆以兩種等值斜撐模型模擬,並分別考量不同磚牆配置狀況與移除柱位置;開孔外牆部份則考量三種不同開孔型式之RC外牆,並以不同之模擬方式進行分析,以探討非結構牆對喪失底層柱作用下,結構之垂直向彈塑性反應之影響。由分析結果顯示,當磚牆配置於較短之主梁上時,較能降低梁端彎矩需求容量比;由非線性分析結果可知,磚牆只在結構初始降伏階段有較為明顯的強度貢獻,對整體結構之抗崩塌強度影響不大。由含開孔外牆RC構架之分析結果顯示,開孔外牆之配置確可降低梁端彎矩需求容量比,但因牆體配置狀況使得結構之剪力需求容量比增加,需加以考量結構之剪力破壞;由非線性靜力分析結果顯示,當結構中含有RC開孔外牆時,確實可提昇結構的抗崩塌強度,但卻會使結構之位移韌性無法完全發揮。
The structure of the building may cause huge progressive collapse when its ground-story column is destroyed and loses its support. Based on the study of a ten-story RC building, non-structural walls are analyzed to find out the effect on the progressive collapse. Interior brick-infill partitions are simulated by equivalent compression struts and need to put the locations of brick-infill walls and column-removed into consideration. RC walls have three different models of perforated, and use different simulated ways to analyze it progressive collapse. The study shows when brick walls are attached to the shorter main beams, it can lower demand-to-capacity ratio. The nonlinear analysis shows brick walls have more obvious contributions to strength only when it is on the structural yield stage. The vertical collapse resistance of the column-removed building is not significantly influenced. The analysis of building with RC walls indicates that it can cause the flexural reductions; however, its shear can be increased. Therefore, the structure still needs to consider the shear failure. The nonlinear static analysis indicates that the RC walls can boost vertical collapse resistance, but it will cause displacement reductions.