RCディープビームのカーボンフットプリントと経済的挙動に及ぼす縦方向空洞の影響
The Effect of Longitudinal Hollows on the Carbon Footprint and Economic Behavior of RC Deep Beams (原題)
Abbas H. Abdulabbas, Murtada Ameer Ismael, Anwar D. Mahmoud
🤖 gxceed AI 要約
日本語
RCディープビームに縦方向の空洞を設け、16本の供試体実験で環境・経済影響を評価した。空洞化によりピーク荷重は2.8〜20.1%低下するが、重量3.56〜12.35%減、CO2排出3.82〜13.82%減、建設コスト3.81〜13.71%減を達成。円形・中央配置・傾斜なしの小径空洞が最適で、構造性能を保ちつつ環境負荷と材料費を削減できる。
English
Sixteen RC deep beams were tested to assess longitudinal hollows' environmental and economic effects. Hollows cut peak load by 2.8-20.1% but reduced weight 3.56-12.35%, CO2 emissions 3.82-13.82%, embodied energy 3.48-13.80%, and construction cost 3.81-13.71%. Small, centered, unsloped circular hollows performed best, offering a viable low-carbon, lower-cost structural option.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の建設業はScope 3排出と資材コスト削減の両立が課題であり、本手法は躯体設計段階でのエンボディドカーボン削減策として、建設会社のGX戦略やLCA算定に応用可能。SSBJ開示におけるScope 3カテゴリ1・2の削減根拠としても参考になる。
In the global GX context
As global disclosure frameworks (ISSB, CSRD) push embodied-carbon accounting into construction, this study offers a concrete design lever for reducing material use and CO2 in concrete structures. It supports transition-planning narratives for the built environment, though it remains a lab-scale structural study rather than a disclosure or policy analysis.
👥 読者別の含意
🔬研究者:空洞形状・配置が構造性能と環境負荷に与える定量的トレードオフの実験データを提供する。
🏢実務担当者:躯体設計で空洞化を採用する際のコスト・CO2削減幅と性能低下の目安として活用できる。
🏛政策担当者:建設分野のエンボディドカーボン削減策として、設計基準や公共調達での低炭素資材評価に示唆を与える。
📄 Abstract（原文）
Introduction/ Objective This study investigates the environmental and economic impact of using longitudinal hollows in RC deep beams, identifying the optimal hollow configuration based on weight reduction compared to peak load. Methods Sixteen deep beams were cast and tested, fifteen of which contained longitudinal hollows, along with a control beam. The deep beams were divided into five groups to study the effects of the number and depth of hollows, the geometric shape of the hollows, the diameter of the hollows, and the slope of the hollows. Results The results illustrated that using longitudinal hollows decreases the peak load of the beams by 2.8% to 20.1%, leads to a reduction in weight of 3.56% to 12.35%, reduces CO 2 emissions by 3.82% to 13.82%, and decreases embodied energy consumption by 3.48% to 13.80%. Discussion Economic analysis indicates that the construction costs of the deep beams are reduced by 3.81% to 13.71% compared to the control beam. Moreover, the behavior of beams with fewer hollows was better, and the smaller hollow diameters resulted in improved peak load capacity. The deep beam with a circular hollow section performed better than other shapes, especially when centered and without a slope, as a slope reduces its peak load capacity. The construction cost of the deep beams is reduced by 3.81% to 13.71% compared to the control beam. Moreover, the behavior of beams with fewer hollows was better, and the smaller hollow diameters resulted in improved peak load capacity. The deep beam with a circular hollow section performed better than other shapes, especially when centered and without a slope, as a slope reduces its peak load capacity. Conclusion Using longitudinal hollows in RC deep beams presents a viable alternative for reducing environmental impact, as well as lowering the cost and waste of raw materials used in their construction, while maintaining satisfactory structural performance, especially for beams with small hollow diameters.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.2174/0118741495507563260924115006first seen 2026-10-03 04:59:40
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