Developments in the Built Environment最新文献

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Instantaneous and long-term structural behavior of timber-flax beams: Design and evaluation of the hybrid flax pavilion component 木材-亚麻梁的瞬时和长期结构行为：混合亚麻展馆组件的设计和评估

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-17 DOI: 10.1016/j.dibe.2025.100782

Tzu-Ying Chen , Renan Prandini , Gregor Neubauer , Sven Hänzka , Jan Knippers

The construction industry significantly contributes to global carbon emissions and resource depletion, necessitating a transition toward more sustainable materials. Renewable materials show high potential as an alternative to conventional fossil-based materials in mitigating climate change within the construction industry. Diversifying the sourcing, especially for plant-based materials, is imperative to ensure sustainability and prevent overreliance on specific resources. In prior studies, Coreless Filament Wound (CFW) natural fiber-reinforced polymer (NFRP) systems have demonstrated promising material efficiency and structural performance. However, the lack of research on their long-term performance in construction applications presents a significant barrier to widespread market adoption. This study addresses this gap by designing, developing, and evaluating the Hybrid Fibre Pavilion constructed for the 2024 Landesgartenschau in Wangen im Allgäu. The pavilion incorporates simply supported beams fabricated from robotically wound NFRPs and cross-laminated timber (CLT) slabs. Full-scale structural components were robotically manufactured and subjected to distributed ultimate load, creep, and cyclic load tests. The findings highlight the viability of this hybrid structural system, demonstrating its potential for robust instantaneous and long-term performance in construction.

建筑行业对全球碳排放和资源消耗做出了重大贡献，需要向更可持续的材料过渡。可再生材料作为传统化石基材料的替代品，在缓解建筑行业的气候变化方面显示出巨大的潜力。采购多样化，特别是对植物性材料而言，是确保可持续性和防止过度依赖特定资源的必要条件。在之前的研究中，无芯长丝缠绕（CFW）天然纤维增强聚合物（NFRP）系统已经显示出良好的材料效率和结构性能。然而，缺乏对其在建筑应用中的长期性能的研究，这对市场的广泛采用构成了重大障碍。本研究通过设计、开发和评估为Wangen im Allgäu的2024年Landesgartenschau建造的混合纤维馆来解决这一差距。展馆采用由机器人缠绕的NFRPs和交叉层压木材（CLT）板制成的简单支撑梁。全尺寸结构部件采用机器人制造，并进行了分布极限载荷、蠕变和循环载荷试验。研究结果强调了这种混合结构系统的可行性，展示了其在施工中具有强大的瞬时和长期性能的潜力。

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引用次数: 0

Digital twin-enabled BIM-blockchain integration for automated and transparent construction progress payments 数字孪生支持bim -区块链集成，实现自动化和透明的施工进度支付

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-14 DOI: 10.1016/j.dibe.2025.100781

Yuxing Wu, Zhou Li

Slow and disputed progress payments undermine contractor liquidity and project schedules due to manual verification, fragmented data, and limited transparency. This paper presents a prototype system that incrementally integrates digital twin (DT), building information modeling (BIM), and blockchain to automate milestone-based payments. The continuously updated DT is conceptualized as a dynamic oracle, capturing real-time site conditions and comparing them with structured BIM milestones. Verified achievements trigger Ethereum smart contracts referencing Merkle-proofed evidence stored off-chain in InterPlanetary File System (IPFS), with disbursements authorized via Gnosis Safe multi-signature wallets. A prototype on a police station project shortened verification to payment from several days to minutes and eliminated disputes across all milestones. A survey of industry professionals confirmed gains in efficiency, transparency, and trust. The proposed system provides a practical foundation for transparent, automated payments and offers pathways for future adoption such as stablecoin settlement and public sector integration.

由于人工验证、数据碎片化和透明度有限，缓慢且有争议的进度付款会破坏承包商的流动性和项目进度。本文提出了一个原型系统，该系统增量集成了数字孪生（DT）、建筑信息建模（BIM）和区块链，以自动实现基于里程碑的支付。不断更新的DT被概念化为一个动态的oracle，捕捉实时的现场条件，并将其与结构化的BIM里程碑进行比较。经过验证的成就触发以太坊智能合约，引用存储在星际文件系统（IPFS）链下的默克尔证明证据，通过Gnosis Safe多重签名钱包授权支付。一个警察局项目的原型将付款验证从几天缩短到几分钟，并消除了所有里程碑的争议。一项针对行业专业人士的调查证实了效率、透明度和信任度的提高。拟议的系统为透明、自动支付提供了实用基础，并为未来的采用提供了途径，如稳定币结算和公共部门整合。

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引用次数: 0

Influence of thermally activated artificial concrete fines composition on mortar strength development 热活化人工混凝土细粒组成对砂浆强度发展的影响

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-13 DOI: 10.1016/j.dibe.2025.100775

Jan P. Höffgen, Frank Dehn

The study explores the use of thermally activated concrete fines as substitution for cement to recycle mineral waste and reduce emissions. Concrete fines from waste recycling have a significant impact on compressive strength, with considerable variation due to their varying compositions. In the present study, 12 artificial concrete fines with varying compositions are thermally activated and assessed for their strength contribution. Increasing aggregate content within artificial fines results in a decrease in compressive strength, with aggregate mineralogy and binder composition having a major impact. Ultimately, this study proposes a model for predicting the impact of fines composition on compressive strength based on mass loss during dehydration. For thermally activated cement paste, the new model proposes no influence on compressive strength compared to the reference (

k = 1.0

). Paste precursors containing hydration products from alternative binders may even surpass the reference (

k > 1.0

), while an increasing amount of inert aggregates reduces strength (

k < 1.0

本研究探讨了使用热活化混凝土细粒作为水泥的替代品，以回收矿物废物并减少排放。来自废物回收的混凝土细粒对抗压强度有显著影响，由于它们的成分不同而有相当大的变化。在本研究中，对12种不同成分的人造混凝土进行了热活化，并评估了它们的强度贡献。人工细粉中骨料含量的增加会导致抗压强度的降低，骨料矿物学和粘结剂组成对抗压强度有主要影响。最后，本研究提出了一个基于脱水过程中质量损失来预测细粒成分对抗压强度影响的模型。对于热活化水泥浆体，与参考模型（k=1.0）相比，新模型对抗压强度没有影响。含有替代粘合剂水化产物的膏体前体甚至可能超过参考值（k>1.0），而惰性聚集体的增加会降低强度（k<1.0）。

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引用次数: 0

Use of bio-waste for silica aerogel composites 利用生物废弃物制备二氧化硅气凝胶复合材料

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-10 DOI: 10.1016/j.dibe.2025.100780

Samuel Pantaleo, Fenne Adriaanse, Florent Gauvin, H.J.H. Brouwers

Silica aerogel, with its exceptionally low thermal conductivity, needs wider applications despite current limitations. Meanwhile, bio-sourced materials are gaining traction because of their large availability, with comparable or superior properties to non-renewable options. Additonnaly, their low carbon footprints are crucial for reducing emissions linked to the building sector. Therefore, combining silica aerogel with bio-sourced materials is a promising way to address both environmental and performance goals. In the present study, composites made of silica aerogel and bio-based materials issued from waste (e.g. loose cellulose fibers and sawdust) are investigated, aiming for thermal insulation as the main application. The impact of each component is studied on properties related to thermal insulation - thermal conductivity, mechanical strength, moisture behavior, and mold development. Using empirical methodology, fine-tuned compositions are developed to get the best properties. Thermal conductivity down to 20 mW m⁻¹.K⁻¹ is achieved, with compression strength fulfilling the standard for thermal insulation materials.

二氧化硅气凝胶具有极低的导热性，尽管目前存在局限性，但仍需要更广泛的应用。与此同时，生物源材料由于其广泛的可用性，具有与不可再生材料相当或更好的性能而越来越受到关注。此外，它们的低碳足迹对于减少与建筑行业相关的排放至关重要。因此，将二氧化硅气凝胶与生物源材料相结合是解决环境和性能目标的一种很有前途的方法。在本研究中，研究了二氧化硅气凝胶与废物（如松散纤维素纤维和锯末）产生的生物基材料的复合材料，以保温为主要应用。研究了每种成分对隔热性能的影响——导热性、机械强度、防潮性能和模具开发。采用经验方法，开发了微调组合物以获得最佳性能。导热系数低至20mw m−1。K−1，抗压强度满足保温材料标准。

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引用次数: 0

On-site experimental study on expressway disaster identification based on ultra-weak FBG sensor array 基于超弱光纤光栅传感器阵列的高速公路灾害识别现场实验研究

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-10 DOI: 10.1016/j.dibe.2025.100777

Sheng Li , Junjie Ma , Wenbin Hu , Mingqiu Liu , Xiaowei Yan , Lina Yue , Jinpeng Jiang

The aging of expressways, intensified by extreme climate events, poses significant risks to safety and functionality. Real-time detection of underground defects without interrupting traffic is essential for preventing severe accidents. This study employs an Ultra-Weak Fiber Bragg Grating (UWFBG) array system to detect subgrade voids and surface sinkholes under normal traffic conditions. Two types of field tests, targeting underground voids (2 m–9 m) and surface sinkholes with suspended cables, are conducted. A scheme for underground voids inspection has been proposed and verified by 101 data samples. For suspended cable, vertical striped noise along time line can be read as typical vibration mode. A diagnostic framework and assessment criteria are developed for the large datasets generated by vehicle-induced signals in real-world situations. By integrating waveform and frequency features, the proposed method enables accurate early warnings of underground road defects without any disruption to traffic.

极端气候事件加剧了高速公路的老化，给高速公路的安全和功能带来了重大风险。在不中断交通的情况下实时检测地下缺陷是防止严重事故发生的必要条件。本研究采用超弱光纤布拉格光栅（UWFBG）阵列系统在正常交通条件下检测路基空隙和地表塌陷。两种类型的现场试验，针对地下空洞（2 m - 9 m）和带有悬挂电缆的地表天坑进行了试验。提出了一种地下空洞检测方案，并通过101个数据样本进行了验证。对于悬索，沿时间线的垂直条纹噪声可以理解为典型的振动模式。针对现实环境中车辆诱导信号产生的大型数据集，开发了诊断框架和评估标准。该方法通过结合波形和频率特征，在不影响交通的前提下，实现对地下道路缺陷的准确预警。

引用次数: 0

Remotely-operated non-contact rebar imaging in concrete using IR-UWB SAR and wavelet-based OMP clutter suppression 基于IR-UWB SAR和基于小波的OMP杂波抑制的混凝土中遥控非接触钢筋成像

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-09 DOI: 10.1016/j.dibe.2025.100769

Yong-Sun Yoo , Changbin Joh , Woo-Kyung Lee , Joo-Hyung Lee

Accurate internal imaging of reinforced concrete (RC) structures is essential for safety assessment, particularly when construction details are unavailable. However, traditional ground-penetrating radar requires surface contact, limiting applicability in field conditions. This study presents a non-contact imaging system integrating impulse radio ultra-wideband (IR-UWB), Vivaldi antennas, and synthetic aperture radar (SAR) processing on a motorized scanning platform. To enhance image quality, wavelet-based clutter suppression using the Orthogonal Matching Pursuit (OMP) algorithm is applied before SAR reconstruction. This approach improves signal sparsity and effectively reduces clutter tailored to UWB characteristics. Experiments on a representative RC specimen with code-compliant cover thickness showed that the signal-to-clutter ratio (SCR) increased from 8.61 dB to 11.08 dB, and the image entropy decreased from 11.77 to 11.32, which enables clearer localization of closely spaced rebars. Although validated on a laboratory-scale specimen, the proposed SAR-OMP system demonstrates strong potential for practical, contactless, and high-resolution imaging in concrete inspection.

钢筋混凝土（RC）结构的精确内部成像对于安全评估至关重要，特别是在无法获得施工细节的情况下。然而，传统的探地雷达需要与地面接触，限制了在野外条件下的适用性。本研究提出了一种集成脉冲无线电超宽带（IR-UWB）、维瓦尔第天线和合成孔径雷达（SAR）处理的非接触式成像系统。为了提高图像质量，在SAR重建前采用正交匹配追踪（OMP）算法进行小波杂波抑制。这种方法提高了信号的稀疏性，有效地减少了针对超宽带特性的杂波。在符合规范覆盖厚度的代表性钢筋混凝土试件上进行的实验表明，信号杂波比（SCR）从8.61 dB增加到11.08 dB，图像熵从11.77降低到11.32，可以更清晰地定位紧密间隔的钢筋。尽管在实验室规模的样品上进行了验证，但所提出的SAR-OMP系统在混凝土检测中具有强大的实用、非接触式和高分辨率成像潜力。

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引用次数: 0

Avalanche in composite materials: concrete and its components under the influence of mix proportion 复合材料中的雪崩：配合比影响下的混凝土及其组成部分

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-08 DOI: 10.1016/j.dibe.2025.100779

Zhibing Jiang , Yunfeng Zhao , Fengjie Cai , Xuepeng Cao , Xiang Jiang

As a composite porous material, the physical failure process of concrete has nonlinear characteristics. This can be explained by the avalanche in physics. The avalanche characteristics of ordinary concrete and its constituent materials under the influence of mix proportion were explored based on acoustic emission (AE). The results show that the avalanche characteristics and corresponding exponent values of concrete are between those of cement mortar and limestone. The energy distribution of limestone shows a pure power law distribution, while the energy distribution of cement mortar and concrete shows a power law distribution with damping. This depends on the status of the two physical mechanisms of bond breaking and friction during the failure process of the three materials. The avalanche characteristics of concrete are not significantly affected by the mix proportion, but rather depend more on the avalanche characteristics of the constituent materials that are the main sources of failure.

混凝土作为一种复合多孔材料，其物理破坏过程具有非线性特征。这可以用物理学中的雪崩来解释。基于声发射技术，研究了普通混凝土及其组成材料在配合比影响下的雪崩特性。结果表明：混凝土的雪崩特性和相应的指数值介于水泥砂浆和石灰石之间；石灰石的能量分布呈纯幂律分布，水泥砂浆和混凝土的能量分布呈带阻尼的幂律分布。这取决于三种材料在破坏过程中断键和摩擦这两种物理机制的状态。混凝土的雪崩特性不受配合比的显著影响，而更多地取决于作为主要破坏源的组成材料的雪崩特性。

引用次数: 0

Deployability, mechanical response, and energy harvesting capacity of a novel solar roof for sports stadiums 体育场馆新型太阳能屋顶的可部署性、机械响应和能量收集能力

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-07 DOI: 10.1016/j.dibe.2025.100771

Rana Nazifi Charandabi , Julia de Castro Motta , Gerardo Carpentieri , Enrico Babilio , Jordi Bonada , Nicholas Fantuzzi , Fernando Fraternali

This study investigates the mechanical behavior and solar energy harvesting capabilities of a novel deployable tensegrity roof structure integrated with sun-tracking photovoltaic systems. An advancement of a recently introduced concept in stadium architecture is proposed for the design of new solar stadiums and the retrofitting of existing ones. The presented study begins with an examination of the kinematics and mechanical performance of a modular unit that serves as the foundational element of a deployable solar roof system. Owing to its high versatility, this module can be adapted to a variety of roof configurations. The study combines analytical investigation of the system’s kinematics with numerical simulations of its vibration modes and structural response under varying levels of cable pretension and wind loading. Finally, the research highlights the improved solar energy harvesting capacity of the system, made possible by the independent tilting of individual roof modules across a sports stadium.

本研究研究了一种新型可展开的张拉整体屋顶结构与太阳跟踪光伏系统集成的力学行为和太阳能收集能力。提出了一种新的体育场馆建筑概念的发展，用于设计新的太阳能体育场馆和改造现有的体育场馆。提出的研究开始于作为可展开太阳能屋顶系统的基本元素的模块化单元的运动学和机械性能的检查。由于其高通用性，该模块可以适应各种屋顶配置。该研究结合了对系统运动学的分析研究，以及在不同水平的索预张力和风荷载下的振动模式和结构响应的数值模拟。最后，该研究强调了该系统的太阳能收集能力的提高，这是通过在体育场上独立倾斜的单个屋顶模块实现的。

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引用次数: 0

Smart sensing and automated fatigue warning in concrete anchorages using thermocouples and thermal imaging 热电偶和热成像技术在混凝土锚固中的智能传感和自动疲劳预警

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-06 DOI: 10.1016/j.dibe.2025.100778

Nikolaos Mellios , Mohamad Ahmad , Theodoros Rousakis , Panagiotis Spyridis

Concrete anchorages are fundamental in modern construction technology, since structural connections enable flexible, rapid, and reversible on-site assembly. This study investigates system to automatically and timely detect fatigue-induced failure under cyclic loading on safety-critical chemical fastening systems using thermal sensors and automated computer vision. Twenty-one tensile tests (19 fatigue, 2 static) were conducted using thermocouples and infrared cameras. A real-time monitoring algorithm was developed to autonomously detect thermal anomalies and associate those to fatigue progression. In all cross-validated recordings, the system issued early warnings before failure, confirming its effectiveness. While single thermocouples proved unreliable due to environmental noise, the thermal image metrology system indicated high accuracy and effectiveness. The work advances automated inspection methods and intelligent failure alerting, based on non-contact sensing of dynamically loaded structural components. It supports predictive maintenance and long-term lifecycle monitoring, contributing to safer, more resilient constructed facilities through data-driven automation and real-time structural health monitoring.

混凝土锚固是现代建筑技术的基础，因为结构连接可以实现灵活、快速和可逆的现场组装。本研究利用热传感器和自动计算机视觉技术，对安全关键型化学紧固系统在循环载荷下的疲劳失效进行了自动、及时的检测。利用热电偶和红外摄像机进行了21次拉伸试验（19次疲劳试验，2次静态试验）。开发了一种实时监测算法，可以自动检测热异常并将其与疲劳进展联系起来。在所有交叉验证的记录中，系统在故障发生前发出预警，确认了其有效性。在单个热电偶受环境噪声影响不可靠的情况下，热图像测量系统具有较高的精度和有效性。该工作提出了基于非接触传感的动态加载结构构件的自动检测方法和智能故障预警。它支持预测性维护和长期生命周期监测，通过数据驱动的自动化和实时结构健康监测，为更安全、更有弹性的设施建设做出贡献。

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引用次数: 0

Properties and microscopic mechanism of MKP-modified magnesium oxychloride cement solidified red mud mkp改性氯化氧镁水泥固化赤泥的性能及微观机理

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment

Pub Date : 2025-10-06 DOI: 10.1016/j.dibe.2025.100774

Weizhun Jin , Yang Zhang , Jinxiao Sun , Xincheng Li , Zijian Song

The effects of magnesium oxychloride cement (MOC) and MKP (Mono potassium phosphate)-modified MOC on the properties of solidified and stabilized Bayer red mud (RM) were studied through the unconfined compressive strength test, durability tests, and microscopic characterizations. Results show that the solidifying effect of MOC can help RM achieve the necessary strength required as a road base or subgrade material in civil engineering. MOC can significantly improve the resistance to water immersion and wetting-drying cycles of RM. MKP has been demonstrated to enhance the resistance to water immersion and wetting-drying cycles of MOC-solidified RM. The mechanical behavior of solidified RM is closely related to the quantity and form of phase 5, the expansion and cementation of brucite, and the pore distribution of matrix. The primary mechanisms underlying the enhancement are attributed to the adsorptive affinity of RM for MKP and the modification of short rod-like phase 5 induced by MKP.

通过无侧限抗压强度试验、耐久性试验和微观表征，研究了氯氧镁水泥（MOC）和磷酸单钾改性MOC对固化稳定拜耳赤泥（RM）性能的影响。结果表明，MOC的固化效果可以帮助RM达到土木工程中作为道路基层或路基材料所需的强度。MOC能显著提高材料的耐浸水能力和干湿循环能力。MKP已被证明可以提高moc固化RM的耐水浸泡和干湿循环能力。固化后RM的力学行为与5相的数量和形态、水镁石的膨胀和胶结以及基体的孔隙分布密切相关。这种增强的主要机制归因于RM对MKP的吸附亲和力和MKP诱导的短杆状phase 5的修饰。

引用次数: 0

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