[{"data":1,"prerenderedAt":59},["ShallowReactive",2],{"q-105170-arch_construction-29":3},{"question":4,"neighbors":24,"sameNumber":43,"prev":32,"next":35},{"id":5,"classKey":6,"session":7,"year":8,"subject":9,"number":10,"groupStem":11,"ownStem":12,"stem":12,"options":13,"answer":15,"answerKind":17,"answerS":11,"answerNote":11,"images":18,"explanation":20,"withheld":11,"deepChars":21,"freq":22,"indexable":23},"arch-105170-801-0103-029","architect","105170",105,"建築構造與施工",29,null,"為增加梁下空間，下列縮減結構梁深方式，何者較為正確？",{"A":14,"B":14,"C":14,"D":14},"",[16],"D","single",[19],"\u002Fimages\u002Farch-105170-801-0103-029.png","本題考點：連續梁沿跨度的彎矩與剪力分布，以及變斷面梁深的合理做法：哪一段可以減小梁深、斷面變化處該用斜向漸變還是直角斷階。\n【正解理由】與柱剛接的連續梁在重力載重作用下，梁端是負彎矩與剪力最大的位置，跨中的彎矩相對較小、剪力趨近於零；因此梁深應保留在梁端，跨中段才是可以減小梁深、換取梁下空間的位置。依題圖所示，(D) 在靠近柱的兩端維持較大梁深，跨中段梁底抬高、梁深減小，而且深淺交接處以斜向漸變過渡，力流可以順著斜面轉向，避免斷面突變造成應力集中，鋼筋也能順勢彎折配置。梁端保留深度、跨中縮減、交接處漸變，三個條件都符合，故選 D。\n【逐項排除】\n(A) 不正確。依題圖所示，(A) 是兩端梁深較小、跨中梁底下降變深，方向剛好相反：把受力最大的梁端做淺、受力較小的跨中做深，梁端抵抗負彎矩與剪力的能力被削弱；而且跨中變深使梁下淨高反而減少，達不到增加梁下空間的目的。交接處又是直角斷階，產生應力集中。\n(B) 不正確。依題圖所示，(B) 雖以斜向漸變過渡，但同樣是梁端淺、跨中深，深淺配置與受力分布相反，梁端強度不足的問題沒有解決，跨中梁下空間也被壓縮。漸變只解決了交接處的應力集中，沒有解決配置方向的錯誤。\n(C) 不正確。依題圖所示，(C) 的配置方向正確，梁端深、跨中淺，但深淺交接處是直角斷階。斷面突然改變時，梁底凹角處會產生應力集中，容易從凹角開裂；縱向鋼筋在斷階處無法順勢延續，必須截斷另行錨定或做急彎，配筋與澆置都較困難。交接處應改為斜向漸變才合理。\n(D) 正確。梁端保留梁深抵抗最大的負彎矩與剪力，跨中梁底抬高增加梁下空間，深淺交接處以斜向漸變過渡，力流與鋼筋都能順暢轉向，是本題所問的答案。\n【記憶點】梁端受力大要保深、跨中可縮；深淺交接用斜坡漸變，不用直角斷階。",540,1,true,[25,28,31,34,37,40],{"number":26,"session":7,"stem":27},26,"有關鋁框玻璃帷幕牆，下列何者不屬於建築師的設計範圍？",{"number":29,"session":7,"stem":30},27,"開挖地下室時，需施作擋土設施，在一般正常土壤情況下，下列那一設施的水密性最高？",{"number":32,"session":7,"stem":33},28,"下列屋頂防水詳圖，何者有滲水的疑慮？",{"number":35,"session":7,"stem":36},30,"有關 RC 結構體內埋設管線，下列敘述何者錯誤？",{"number":38,"session":7,"stem":39},31,"在鋼構建築中，鋼梁與混凝土鋼浪板樓版之間如何結合？",{"number":41,"session":7,"stem":42},32,"下列有關鋼桁架的敘述，何者錯誤？",[44,47,50,53,56],{"number":10,"session":45,"stem":46},"114180","帷幕牆一般由各種單元或元件組成，因此組構上皆有某種型態之空隙存在，接縫處必須搭配完美…",{"number":10,"session":48,"stem":49},"113190","下列鋼結構體工法之描述何項錯誤？",{"number":10,"session":51,"stem":52},"112190","關於地基調查，下列敘述何者錯誤？",{"number":10,"session":54,"stem":55},"111180","有關鋼構造之高強度螺栓之敘述，下列何者正確？",{"number":10,"session":57,"stem":58},"110180","下列關於屋頂防水工程的敘述，何者錯誤？",1791863214572]