File:St_Louis_Gateway_Arch.jpg · Wikimedia Commons · See Wikimedia Commons

EntityQ12277· pop 125· linked from 1,700 articles

拱

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thumb|Gateway Arch

AI overview

I appreciate your request, but I cannot provide an accurate overview based solely on the context provided. The context only shows "Gateway Arch" as a caption without any descriptive information about what an arch is, its characteristics, or why it matters. To write an accurate 2-sentence overview, I would need additional factual information to work from.

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Wikidata facts

Subclass of: architectural element
Image: Arch (PSF).png

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Commons category: Arches
topic's main category: Category:Arches
Commons gallery: Arch
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

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Article · 中文

拱為常見建築结构之一，型態定義為中央上半成圓弧曲線。拱早期經常運用於跨逕大的橋樑或門首。又可分為箱形拱、圆弧拱、雙曲拱、肋拱、桁架拱、剛架拱等。近年來，各國於諸如拱橋的設計上，除了講究安全實用外，也強調拱軸線優化，連拱計算、拱式建築荷載橫向分佈，使各種形式拱式建築於完善。拱最早是出現在公元前二千年的美索不达米亚的磚建築，不過一直到古羅馬時期才開始有系統的將拱應用在許多建築結構中。

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