[{"data":1,"prerenderedAt":61},["ShallowReactive",2],{"q-105170-arch_construction-60":3},{"question":4,"neighbors":26,"sameNumber":45,"prev":34,"next":37},{"id":5,"classKey":6,"session":7,"year":8,"subject":9,"number":10,"groupStem":11,"ownStem":12,"stem":12,"options":13,"answer":18,"answerKind":20,"answerS":11,"answerNote":11,"images":21,"explanation":22,"withheld":11,"deepChars":23,"freq":24,"indexable":25},"arch-105170-801-0103-060","architect","105170",105,"建築構造與施工",60,null,"有關鋼筋混凝土構造之懸臂樓版配筋，下列敘述何者正確？",{"A":14,"B":15,"C":16,"D":17},"主要鋼筋上下層均勻分布","主要鋼筋配置在上層","主要鋼筋配置在中層","主要鋼筋配置在下層",[19],"B","single",[],"本題考點：懸臂樓版的彎矩分布與受拉側位置；鋼筋混凝土構材的主筋必須配置在受拉側，懸臂版受拉的是上緣。\n【正解理由】懸臂樓版只有一端固定在梁或牆上，另一端自由。版上的自重與活載重使版往下彎，整段懸臂都承受負彎矩，而且愈靠近固定端彎矩愈大：上緣受拉、下緣受壓。混凝土抗壓強、抗拉弱，受拉側一旦開裂就只能靠鋼筋承擔拉力，所以承擔彎矩的主要鋼筋必須配置在上層，並且延伸跨過支承、錨定進後方的梁或樓版內，固定端才不會從上緣拉裂。故選 B。\n【逐項排除】\n(A) 錯誤。懸臂版在重力載重下整段都是上緣受拉，並沒有上下交替受拉的情形，主筋不需要上下均勻分布。下層通常只配置溫度鋼筋或輔助鋼筋，作用是控制乾縮裂縫與固定鋼筋網，不是承擔主要彎矩。正確說法是：主筋集中在上層受拉側。\n(B) 正確，為本題答案。懸臂版承受負彎矩，上緣為受拉側，主筋配置在上層才能直接抵抗拉力；同時須伸入支承內足夠長度以錨定。\n(C) 錯誤。版斷面中層接近中性軸，該處應力接近零，鋼筋放在這裡力臂很小，幾乎不能提供抵抗彎矩的力量；把主筋放在中層等於讓上緣混凝土單獨受拉而開裂。正確說法是：主筋應配置在離中性軸最遠的受拉外緣，也就是上層。\n(D) 錯誤。主筋配置在下層，是簡支版或連續版跨中承受正彎矩（下緣受拉）的配筋方式。懸臂版的受拉側正好相反，若把主筋放在下層，上緣無鋼筋可承擔拉力，固定端會先開裂，嚴重時整片懸臂版斷落。正確說法是：懸臂版主筋配置在上層。\n【記憶點】鋼筋放在「受拉側」：簡支版跨中拉下緣、懸臂版拉上緣，懸臂版主筋放上層。",651,1,true,[27,30,33,36,39,42],{"number":28,"session":7,"stem":29},57,"澆置混凝土工程如鋼筋太密時，下列何種措施不可採行？",{"number":31,"session":7,"stem":32},58,"混凝土構材以 D16 鋼筋為肋筋或箍筋時，其 135 度標準彎鉤於彎轉後之直線延伸長…",{"number":34,"session":7,"stem":35},59,"當使用 SD420 鋼筋施工時，鋼筋不可進行下列何種施作？",{"number":37,"session":7,"stem":38},61,"建築工程鋼構之組配，地面或最高永久性樓版層上，尚未螺栓緊結之樓層數不得超過若干層？",{"number":40,"session":7,"stem":41},62,"有關噴附式防火被覆之設計與施工，下列敘述何者錯誤？",{"number":43,"session":7,"stem":44},63,"下列何者不是電扶梯常用的踏階寬度？",[46,49,52,55,58],{"number":10,"session":47,"stem":48},"114180","關於防火構造建築物內之挑空部分，下列敘述何者錯誤？",{"number":10,"session":50,"stem":51},"113190","依建築技術規則之規定，防火門窗周邊多少範圍內之牆壁應以不燃材料建造？",{"number":10,"session":53,"stem":54},"112190","傳統建築疊斗式大木構架係以斗栱支撐桁楹，以下有關此處斗拱之敘述何者錯誤？",{"number":10,"session":56,"stem":57},"111180","依據 CNS 標準規定，一種磚建築用普通磚之吸水率應不超過：",{"number":10,"session":59,"stem":60},"110180","依建築技術規則建築構造編，基樁以整支應用為原則，樁必須接合施工時，其接頭應不得在基礎…",1791863214796]