Journal of building engineering最新文献_第2页

Adaptive feedback-based thermal management of mass high-performance concrete: Field validation and performance assessment on a raft foundation 基于自适应反馈的大体积高性能混凝土热管理：筏形基础的现场验证和性能评估

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-03 DOI: 10.1016/j.jobe.2026.117468

Wael Slika, Nour Wehbi

{"title":"Adaptive feedback-based thermal management of mass high-performance concrete: Field validation and performance assessment on a raft foundation","authors":"Wael Slika, Nour Wehbi","doi":"10.1016/j.jobe.2026.117468","DOIUrl":"https://doi.org/10.1016/j.jobe.2026.117468","url":null,"abstract":"Early-age thermal cracking in mass high-performance concrete (HPC) is commonly managed by mixture/placement-temperature measures, fixed insulation, or embedded post-cooling. These measures reduce thermal demand but cannot bidirectionally regulate the exposed boundary from measured response as the thermal state evolves. This study develops a seven-step closed-loop Thermal Control Plan (TCP) using curing-water temperature as the surface actuator to link thermal-demand characterization, governing limits, purpose-derived sensing, operating margins, feedback, and criterion-based release. The method was field-validated in a Gulf programme comprising hot-weather full-thickness mock-ups and a winter raft. Across two 3.0 × 3.0 × 2.6 m C60 HPC mock-ups, the representative core–top-centre control-pair differential was 19.0 °C under the feedback-regulated boundary package and 27.5 °C under the unregulated-water condition, while core peaks differed by only 1.1 °C. The dominant between-trial difference therefore occurred at the exposed surface rather than in the hydration-generated core. Full-scale implementation on a 2.6 m raft produced a 61 °C peak core temperature, a maximum reported centre-to-surface differential of 19.2 °C, and curing-water spatial variation within approximately 3 °C. Macroscopic inspection found no visible cracking in the examined cores; targeted qualification of the regulated heated-boundary configuration found no major UPV/impulse-response anomaly in accessible areas and no microcracking or ITZ separation in the two examined petrographic sections, although a localized 2–3 mm porous outer zone was documented. The results demonstrate a full-scale, non-embedded surface-control architecture responsive to measured structural behavior; numerical set points require application-specific calibration.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"23 1","pages":"117468"},"PeriodicalIF":6.4,"publicationDate":"2026-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of PM10 particle shape on indoor transport and breathing-zone exposure in a typical office 典型办公室PM10颗粒形态对室内迁移和呼吸区暴露的影响

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-02 DOI: 10.1016/j.jobe.2026.117489

He Li, Tao Li, Ting Liu, Xin Wang, Chanjuan Sun

{"title":"Effects of PM10 particle shape on indoor transport and breathing-zone exposure in a typical office","authors":"He Li, Tao Li, Ting Liu, Xin Wang, Chanjuan Sun","doi":"10.1016/j.jobe.2026.117489","DOIUrl":"https://doi.org/10.1016/j.jobe.2026.117489","url":null,"abstract":"In conventional indoor environment simulation of PM<ce:inf loc=\"post\">10</ce:inf> pollution, indoor PM<ce:inf loc=\"post\">10</ce:inf> particles are often assumed to be spherical, neglecting the influence of shape factors on particle behavior, which may result in deviations between predicted and actual breathing-zone exposure estimates. This study experimentally measured the actual typical shape factors of indoor PM<ce:inf loc=\"post\">10</ce:inf> particles and then used numerical simulations to assess their impact on particle transport in a typical office environment, providing a basis for indoor air quality and screening-level exposure assessment. Under the top-supply, top-return ventilation configuration and operating conditions considered in this study, the simulations identified an approximately 1.2 m crossover height in the vertical concentration distributions of spherical and non-spherical particles. Below this height, spherical particle concentrations were higher, whereas above it, non-spherical particle concentrations predominated. Because the breathing zone (1.5–1.7 m) was above this case-specific crossover height, the spherical-particle assumption may underestimate particle exposure when non-spherical particles predominate. Additionally, traditional methods assuming spherical particles systematically underestimate exposure by an average of 16.2% at the breathing zone and up to 34.1% in areas with highly active local airflow. This study clarifies the influence of particle shape factors on indoor particle behavior and highlights associated assessment biases, thereby providing a theoretical basis and data support for more accurate inhalation exposure assessment and for optimizing the design of air conditioning and purification systems.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"8 1","pages":"117489"},"PeriodicalIF":6.4,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation and energy-equivalent SDOF modelling of unbonded post-tensioned concrete beam-column sub-assemblages under drop-weight impact 落锤冲击下无粘结后张混凝土梁柱组合体的试验研究及能量等效SDOF模型

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117471

Peng Yu, Jiabo Chen, Yanjun Chang, Xinjie Wang, Yong Mei, Yun Cheng, Yingkang Yao, Zikang Guo

{"title":"Experimental investigation and energy-equivalent SDOF modelling of unbonded post-tensioned concrete beam-column sub-assemblages under drop-weight impact","authors":"Peng Yu, Jiabo Chen, Yanjun Chang, Xinjie Wang, Yong Mei, Yun Cheng, Yingkang Yao, Zikang Guo","doi":"10.1016/j.jobe.2026.117471","DOIUrl":"https://doi.org/10.1016/j.jobe.2026.117471","url":null,"abstract":"Dynamic force transfer and deformation prediction of unbonded post-tensioned (UPT) concrete beam-column sub-assemblages under drop-weight impact remain insufficiently understood. This study combines impact tests, finite element (FE) analysis, and reduced-order modelling. Six 1/3-scale UPT sub-assemblages were tested with varied impact velocity, hammer mass, and boundary restraint. All specimens exhibited flexure-dominated damage. Peak impact force primarily reflected the velocity-sensitive local contact response, whereas first-peak middle-joint displacement (MJD) represented global deformation demand and was sensitive to both velocity and mass. Support reactions revealed an initial negative vertical-reaction phase consistent with transient reverse-arch response; for the velocity series, its duration was 4.3–6.3 times the structural local-response time. This phase was followed by compression-dominated global force transfer, and higher-demand cases exhibited a CAA-to-CA transition at an MJD of approximately 300–400 mm. Validated FE models reproduced first-peak MJD with errors of 6.6% and 3.2% for representative symmetric and asymmetric specimens. An energy-equivalent SDOF model with condensed hammer–sub-assemblage coupling was developed for symmetric two-bay sub-assemblages. The UPT-specific resistance backbone was mechanically derived from sectional equilibrium, axial compatibility, global unbonded-tendon elongation, and global equilibrium, with FE pushdown used only for independent verification. Hammer mass and velocity defined the impact input without a measured or FE-derived force history. Prediction errors for SYM1, SYM2, and SYM4 were 6.5%, 9.3%, and −8.9%, respectively, with a mean absolute error of 8.2%.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"32 1","pages":"117471"},"PeriodicalIF":6.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A moisture absorption model for CFRP rods considering multi-scale pore evolution characterized by MIP and Micro-CT 基于MIP和Micro-CT表征的多尺度孔隙演化CFRP棒吸湿模型

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117470

Rui Zheng, Zeping Zhang, Lili Hu, Qingrui Yue, Xiaogang Liu

{"title":"A moisture absorption model for CFRP rods considering multi-scale pore evolution characterized by MIP and Micro-CT","authors":"Rui Zheng, Zeping Zhang, Lili Hu, Qingrui Yue, Xiaogang Liu","doi":"10.1016/j.jobe.2026.117470","DOIUrl":"https://doi.org/10.1016/j.jobe.2026.117470","url":null,"abstract":"To investigate the moisture absorption and degradation mechanisms of carbon fiber reinforced polymer (CFRP) rods under hygrothermal conditions, long-term immersion tests were conducted at 20, 40, 60, and 80 °C for up to 13200 h. The study analyzed the temperature-time dependence of the moisture absorption behavior, especially at a high temperature of 80 °C, elucidating the transition of moisture transport from Fickian diffusion to a damage-assisted non-Fickian mechanism. Mercury intrusion porosimetry (MIP) and X-ray micro-computed tomography (Micro-CT) were employed to characterize the multiscale evolution of internal pore structures, defect morphology, and pore/crack connectivity in the CFRP rods during aging. Consequently, a three-mechanism moisture uptake model was established by incorporating microstructural damage evolution, capturing initial rapid absorption, Fickian-like diffusion, and damage-related additional moisture uptake associated with pore/crack evolution. The pore/crack-related contribution increased from 4.22% to 9.44% at 20 and 40 °C to 45.09% at 60 °C and 72.68% at 80 °C, indicating an increasingly important role of long-term structural evolution at elevated temperatures. These fractions were evaluated at 13200 h for 20-60 °C and at 9168 h for 80 °C and represent model-based contributions. By incorporating pore-structure evolution as a structural constraint, the proposed model provides a structurally informed description of moisture uptake, particularly under high-temperature hygrothermal-aging conditions with pronounced pore/crack evolution. Ultimately, this work clarifies the durability physics of CFRP rods, showing that aggressive hygrothermal conditioning accelerates defect proliferation, enhancing the additional moisture uptake associated with pore/crack evolution.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"180 1","pages":"117470"},"PeriodicalIF":6.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on seismic performance of self-confined autoclaved aerated concrete block walls for large-span and high-ceiling buildings 大跨度高顶棚自约束蒸压加气混凝土砌块墙体抗震性能试验研究

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117525

Cheng Yin,Bin Zhao,Lei Su,Qi Jiang

引用次数: 0

Magnetically functionalized capsules for achieving targeted self-healing in cement mortar 在水泥砂浆中实现定向自愈的磁性功能化胶囊

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117516

Jinghui Wu,Shuxia Ren,Jielin Tao,Anqi Yu,Wisal Ahmed,Dengwu Jiao

引用次数: 0

Mechanism and experimental study of dual-amplification sensitive and efficient energy dissipating viscous dampers 双放大灵敏高效耗能粘性阻尼器机理及实验研究

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117495

Yun Chen,Feifei Sun

引用次数: 0

Research on the influence of depth-to-span ratio on the collapse resistance of steel frames with corrugated webs 深跨比对波纹腹板钢框架抗倒塌性能的影响研究

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117434

Zheng Tan,Fei-fei Zhao,Wei-hui Zhong,Shu-hua Liu,Bao Meng,Xing-you Yao,Heng-li Cai

引用次数: 0

Study on Fire Resistance of Critical Mortise-and-Tenon Joints in Chuandou-style Ancient Timber Buildings 川斗式木结构古建筑关键榫卯节点的耐火性能研究

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117493

Yongwang Zhang,Mengchen Tan,Xinyu Liu,Peng Sun,Wei Zhu,Shihao Chen,Xiaofei Zhang,Keqian Ji,Weibin Ni,Lu Wang

引用次数: 0

Laboratory-scale formulation optimisation of an aluminium sulfate-based alkali-free liquid accelerator using response surface methodology 用响应面法优化实验室规模的硫酸铝基无碱液体促进剂配方

IF 6.4 2区工程技术

Journal of building engineering Pub Date : 2026-10-01 DOI: 10.1016/j.jobe.2026.117518

Xuan Xie,Yongxiang Zhou,Gengyin Cui,Zhipeng Meng,Shaohan Li

引用次数: 0