Journal of building engineering最新文献

What is the effect of eco-efficient plasters on bio-composite boards made from vegetable residues and bio-binders? 生态高效膏药对由蔬菜残渣和生物粘合剂制成的生物复合板有什么影响？

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-28 DOI: 10.1016/j.jobe.2026.116214

Brenda Arias-Cárdenas , Ana Maria Lacasta , Laia Haurie , Tânia Santos , Paulina Faria

{"title":"What is the effect of eco-efficient plasters on bio-composite boards made from vegetable residues and bio-binders?","authors":"Brenda Arias-Cárdenas , Ana Maria Lacasta , Laia Haurie , Tânia Santos , Paulina Faria","doi":"10.1016/j.jobe.2026.116214","DOIUrl":"10.1016/j.jobe.2026.116214","url":null,"abstract":"<div><div>Bio-based composites manufactured from vegetable residues represent a promising solution for sustainable construction, particularly for lightweight insulating and interior coating applications. The aim of the present study is to assess the behaviour of some bio-composites after coating with different eco-efficient mortars, using hemihydrate calcium sulphate, lime, and clay as binders, and investigate their possible use as bio-composite boards. The influence of the selected bio-materials — rice husk and straw, sunflower stem, and <em>posidonia oceanica</em> — and the characteristics of the natural binders — xanthan gum, arabic gum and sodium alginate — on the overall performance of these systems will be determined through a series of physical and mechanical tests, including mass gain, thermal conductivity, moisture adsorption–desorption cycles, abrasion resistance, surface hardness and dripping resistance. The results show that mass gain after coating is primarily controlled by variations in the applied mortar thickness rather than by penetration into the bio-composite substrate. Coated systems preserved low thermal conductivity values, while the mortar type governed the surface-related performance of the composites, largely overriding the influence of the bio-composite. Regarding hygroscopic behaviour, the application of mortar coatings significantly reduced moisture adsorption compared to uncoated composites; however, the bio-composite continued to influence the overall moisture response. Among the coatings, lime mortars provided the greatest reduction in moisture uptake, while clay- and gypsum-based systems exhibited comparable adsorption trends, reflecting a balance between vapour permeability and moisture buffering capacity. The results of this research will increase the knowledge on the use and effectiveness of bio-based building materials as regards their possible integration into green building technology.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116214"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851471","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

Shear performance of epoxy resin concrete–strengthened continuity joints in continuous beams under negative moments 负弯矩作用下环氧树脂混凝土连续梁节点抗剪性能

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-22 DOI: 10.1016/j.jobe.2026.116149

Kaizhong Xie , Kang Huang , Yue Qin , Xianyan Luo , Guoqiang Long , Desheng Meng , Jiacheng Hai

{"title":"Shear performance of epoxy resin concrete–strengthened continuity joints in continuous beams under negative moments","authors":"Kaizhong Xie , Kang Huang , Yue Qin , Xianyan Luo , Guoqiang Long , Desheng Meng , Jiacheng Hai","doi":"10.1016/j.jobe.2026.116149","DOIUrl":"10.1016/j.jobe.2026.116149","url":null,"abstract":"<div><div>Cracking and deformation in negative-moment continuity joints are important serviceability concerns in in-service continuous beam bridges, while strengthening solutions for such joints have received relatively limited attention. This study aims to investigate the shear performance, crack control behavior, and mechanical contribution of epoxy resin concrete (ERC)-strengthened continuity joints under negative moments. To this end, ten continuous beam specimens with ERC-strengthened joints and one ordinary-concrete reference specimen were tested under five-point bending. The failure process, crack evolution, and deformation response were examined, and finite element analyses were conducted to clarify the mechanical role of the ERC joint. A cracking-load prediction formula was proposed for ERC-strengthened negative-moment joints, and the applicability of various code-based provisions to continuous beams with ERC-strengthened joints was evaluated. The test results showed that all specimens ultimately exhibited shear-dominated failure, governed by diagonal cracking in the ordinary concrete regions outside the joint. Compared with the reference specimen, the tested ERC-joint configurations showed improved crack resistance and deformation control in the joint region. The mean maximum crack width in the joint region decreased from 0.80 mm to 0.19 mm, and the cracking load increased by 134.63%. The FE models reproduced the experimental response with good accuracy, and the proposed cracking-load expression agreed with the test results within 7%. For the investigated specimens, the assessed shear design provisions were conservative, with safety margins exceeding 1.27. These findings provide experimental evidence and design-oriented support for the strengthening of cracked continuity joints in continuous beam bridges.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116149"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851424","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

Seismic performance and calculation method of L-shaped corrugated double-skin composite wall l形波纹双层复合墙体抗震性能及计算方法

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-11 DOI: 10.1016/j.jobe.2026.116090

Qiuhong Zhao , Hu Jiang , Jinliang Bian , Bo Liu , Zhihua Chen

{"title":"Seismic performance and calculation method of L-shaped corrugated double-skin composite wall","authors":"Qiuhong Zhao , Hu Jiang , Jinliang Bian , Bo Liu , Zhihua Chen","doi":"10.1016/j.jobe.2026.116090","DOIUrl":"10.1016/j.jobe.2026.116090","url":null,"abstract":"<div><div>L-shaped double-skin composite walls (L-DSCWs) have been increasingly applied in high-rise buildings due to their excellent seismic performance. Existing studies have primarily focused on L-DSCWs with flat steel faceplates and various length-to-width ratios. In this study, four 1/3-scale L-DSCW specimens with different faceplate profiles and length-to-width ratios were tested under cyclic lateral loading. The test results showed that length-to-width ratio had a significant influence on the peak lateral load, stiffness and energy dissipation capacity. With the length-to-width ratio increasing from 5.0 to 7.0, the peak lateral load, stiffness and energy dissipation of the L-DSCWs with flat faceplates increased by 27.8%, 61.4% and 23.5%, respectively. The faceplate profiles also influences the seismic performance of L-DSCWs.When the faceplate profile changed form flat to corrugated, the peak lateral load and energy dissipation increased by 6.2% and 14.9%, respectively. All specimens have a good ductility, with ductility ratios greater than 5.4. A formula for the ultimate bending capacity was derived and validated against the test results, with an error of less than 11%.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116090"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147681271","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

Seismic performance of masonry walls retrofitted with a low-carbon and low-intervention sprayed ECC: Experimental and analytical studies 低碳、低干预喷涂ECC砌筑墙的抗震性能：实验与分析研究

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-21 DOI: 10.1016/j.jobe.2026.116152

Tian Zhang , Xiaoqin Li , Wei Ning , Zhengmeng Hou , Keran Li , Xiaohao Yang

{"title":"Seismic performance of masonry walls retrofitted with a low-carbon and low-intervention sprayed ECC: Experimental and analytical studies","authors":"Tian Zhang , Xiaoqin Li , Wei Ning , Zhengmeng Hou , Keran Li , Xiaohao Yang","doi":"10.1016/j.jobe.2026.116152","DOIUrl":"10.1016/j.jobe.2026.116152","url":null,"abstract":"<div><div>Existing retrofitting methods for unreinforced masonry (URM) structures, such as strengthening with steel and plastic meshes/plates or conventional engineered cementitious composites (ECC), usually are with problems of premature cracking, interface debonding, limited enhancement, low efficiency, high intervention, or significant carbon emission. Also, the failure mechanisms of both strengthened and un-strengthened URMs are affected by vertical compressive stresses; however, few studies have addressed this. This study proposes a sprayed ECC retrofitting technique, which provides a low-carbon, high-efficiency, and low-intervention solution. This approach minimizes interference to both existing masonry structures and residents during the strengthening process. Quasi-static cyclic tests were performed to evaluate the seismic performance of URM walls and ECC-strengthened walls under varying vertical compressive stresses. Additionally, the strengthening effects of both sprayed and manually applied ECC with either high or low volumes of fly ash (FA) were investigated. Results indicate that ECC retrofitting significantly enhances load-bearing capacity and deformation performance, while transforming failure modes from brittle to ductile. The sprayed ECC method increases construction efficiency by up to fivefold compared to manual application, while ensuring uniform material distribution and strong interfacial bonding. Owing to FA's remarkable role as a green binder, high-volume FA ECC reduced carbon emissions by 60.92% relative to its low-volume counterpart. Based on the collected test data, the influence of vertical compressive stress on the horizontal shear stress of retrofitted masonry walls is analyzed, and an analytical model considering vertical compressive stress (0.1∼1.22 MPa) is developed to estimate the shear capacity of ECC-retrofitted URM walls.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116152"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736236","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

Passivation and corrosion behavior of steel in simulated concrete pore solutions with varying pH induced by CO2 curing 钢在不同pH值模拟混凝土孔隙溶液中的钝化和腐蚀行为

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-25 DOI: 10.1016/j.jobe.2026.116172

Congcong Ma , Wulong Zhang , Mengzhu Chen , Tao Xu , Li Tian , Changhui Yang , Linwen Yu

{"title":"Passivation and corrosion behavior of steel in simulated concrete pore solutions with varying pH induced by CO2 curing","authors":"Congcong Ma , Wulong Zhang , Mengzhu Chen , Tao Xu , Li Tian , Changhui Yang , Linwen Yu","doi":"10.1016/j.jobe.2026.116172","DOIUrl":"10.1016/j.jobe.2026.116172","url":null,"abstract":"<div><div>This study examines the effects of CO<sub>2</sub> curing on the passivation and corrosion behavior of steel in concrete. The passivation and corrosion behavior of steel were compared between simulated concrete pore (SCP, pH = 12.47) solution and simulated carbonated concrete pore (SCCP, pH ranging from 9.70 to 12.47) solution. Although CO<sub>2</sub> curing initially lowers the pH of concrete, the alkalinity can be restored through subsequent hydration, allowing the formation of a stable passive film on the steel surface. The results indicate that the thicknesses of the passive films formed in the SCP and SCCP solutions are 2.4∼5.7 nm and 3.9∼5.2 nm, respectively. Both passive films comprise of Fe<sup>2+</sup> oxides, Fe<sup>3+</sup> oxides, and Fe<sup>3+</sup> hydroxides. The passive film in the SCP solution exhibits superior corrosion resistance due to its higher Fe<sup>2+</sup>/Fe<sup>3+</sup> ratio. When exposed to chloride-induced corrosion, both conditions show a chloride threshold concentration of 0.13 mol/L, but their corrosion behaviors differ. The corrosion products on the steel surface in both solutions consist of FeOOH and Fe<sub>2</sub>O<sub>3</sub>. However, the SCCP solution promotes the formation of the protective corrosion product FeCO<sub>3</sub> on the steel surface, resulting in higher <em>R</em><sub>ct</sub> and <em>C</em><sub>dl(eff)</sub> compared to the steel in SCP solution, thereby slowing the corrosion rate. These findings offer valuable insights into the application of CO<sub>2</sub> curing in reinforced concrete structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116172"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851406","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

Fresh properties, mechanical behavior, and shrinkage development in alkali-activated binder-based ultra-high strength concretes incorporating seawater and sea-sand 掺入海水和海砂的碱活化粘结剂基超高强度混凝土的新鲜性能、力学行为和收缩发展

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-27 DOI: 10.1016/j.jobe.2026.116198

Rongjin Cai , Wei Wang , Quanhui Liu

{"title":"Fresh properties, mechanical behavior, and shrinkage development in alkali-activated binder-based ultra-high strength concretes incorporating seawater and sea-sand","authors":"Rongjin Cai , Wei Wang , Quanhui Liu","doi":"10.1016/j.jobe.2026.116198","DOIUrl":"10.1016/j.jobe.2026.116198","url":null,"abstract":"<div><div>This paper investigates the effect of composite activator composition on fresh properties, mechanical behavior, and shrinkage development of seawater sea-sand alkali-activated binder-based ultra-high strength concretes (SSAAB-UHSC). The mineralogical composition and microstructural formation of SSAAB-UHSC are also studied in detail. The results show that potassium incorporation into carbonate/silicate-type composite activators of SSAAB-UHSC is conducive to improving the flowability, but triggers shortened setting behavior that can be mitigated using borax admixture. The retarding effect induced by borax admixture is suppressed for the cases of hydroxide/silicate-type composite activators. The SSAAB-UHSC with composite activator of K<sub>2</sub>CO<sub>3</sub>/Na<sub>2</sub>SiO<sub>3</sub> shows superior fresh and mechanical properties, i.e., 28-day compressive strength above 100 MPa, slump flow diameter above 200 mm, and setting time above 30 min. Autogenous shrinkage for SSAAB-UHSC mixture may be positively correlated with compressive strength at early age of 1 day, while SSAAB-UHSC mixture shows a negative relation of drying shrinkage with 28-day compressive strength. Also, both hydrotalcite-type and AFm-type phases show contributions on chloride-binding behaviors in SSAAB-UHSC with composite activators of K<sub>2</sub>CO<sub>3</sub>/Na<sub>2</sub>SiO<sub>3</sub>, whereas the chloride binding capacity of SSAAB-UHSC with other composite activators, i.e., KOH/Na<sub>2</sub>SiO<sub>3</sub>, Na<sub>2</sub>CO<sub>3</sub>/Na<sub>2</sub>SiO<sub>3</sub>, KOH/K<sub>2</sub>SiO<sub>3</sub>, Na<sub>2</sub>CO<sub>3</sub>/K<sub>2</sub>SiO<sub>3</sub>, and K<sub>2</sub>CO<sub>3</sub>/K<sub>2</sub>SiO<sub>3</sub>, may be mainly attributed to hydrotalcite-type phases.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116198"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147756134","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

Synergistic enhancement of seismic and progressive collapse resistance in prefabricated RCS frame structures 预制RCS框架结构抗地震和抗渐进倒塌的协同增强

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-26 DOI: 10.1016/j.jobe.2026.116157

Youquan Liu, Lu Ma, Huan Ye, Zhang Wei, Kunkun Zhao, Guangkun Li

{"title":"Synergistic enhancement of seismic and progressive collapse resistance in prefabricated RCS frame structures","authors":"Youquan Liu, Lu Ma, Huan Ye, Zhang Wei, Kunkun Zhao, Guangkun Li","doi":"10.1016/j.jobe.2026.116157","DOIUrl":"10.1016/j.jobe.2026.116157","url":null,"abstract":"<div><div>Prefabricated reinforced concrete column-steel beam (abbreviation: RCS) composite frame structures offer significant advantages for modular construction and have broad application prospects. Drawing on seismic and progressive collapse tests of prefabricated RCS frame substructures with different beam–column connections, one connection is selected as a representative case. To optimize seismic and progressive collapse resistance, high-performance components (tendons and Y-shaped braces) are integrated into the RCS frame, forming the High-Performance RCS (abbreviation: HPRCS) frame. A calibrated finite element analysis (FEA) approach is employed to evaluate its seismic and progressive-collapse performance. The results show that plastic deformation concentrates in the energy-dissipating segment, providing substantial energy dissipation, while the Y-shaped brace enhances lateral load-carrying capacity by 57.6% compared with conventional RCS frames. Under central-column failure, tendons increase the ultimate progressive collapse resistance by 113.7%; under corner-column failure, the Y-shaped brace optimizes the load-transfer path, improving resistance by 47.4%. The introduction of high-performance components markedly improves both seismic performance and resistance to progressive collapse. In addition, the load-bearing mechanisms of the high-performance components within the HPRCS frame are analyzed theoretically, and calculation methods are proposed to quantify their contributions to seismic and progressive collapse resistance. These methods provide valuable guidance for incorporating high-performance components to enhance the seismic and anti-progressive collapse performance of RCS-frame structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116157"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851426","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

Lateral-torsional buckling behavior of through-fastened stainless steel roof purlin under up-lift loads 贯通式不锈钢屋面檩条在上升荷载作用下的侧向扭转屈曲行为

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-23 DOI: 10.1016/j.jobe.2026.116163

Dun Liang , Shenggang Fan , Wenlei Hou , Baofeng Zheng

{"title":"Lateral-torsional buckling behavior of through-fastened stainless steel roof purlin under up-lift loads","authors":"Dun Liang , Shenggang Fan , Wenlei Hou , Baofeng Zheng","doi":"10.1016/j.jobe.2026.116163","DOIUrl":"10.1016/j.jobe.2026.116163","url":null,"abstract":"<div><div>This paper investigates the lateral-torsional buckling (LTB) behavior of through-fastened stainless steel roof purlins under up-lift loads. A combined experimental and numerical approach was adopted. A finite element (FE) model was first developed and validated against data from a full-scale roof system test. The validated model was then employed to conduct a parametric study, examining the effects of initial geometric imperfections, roof panel thickness, diameter of the self-tapping screw, and the cross-sectional characteristic on the structural response. The results reveal the coupled failure mechanism involving LTB, local and distortional buckling, as well as the interaction between purlins and the roof panels. Furthermore, the accuracy and applicability of three codes, EN 1993-1-3, GB 50018, and AISI S100, were evaluated against the numerical results. The comparison indicates that while all three codes yield conservative predictions due to their derivation based on carbon steel, EN 1993-1-3 demonstrates superior predictive accuracy through its refined modeling of the restraint system, albeit at the expense of relatively higher computational cost. The study also highlights the critical influence of effective length selection. Based on the finding that sag rods provide only discrete point restraints, it is recommended that the effective lengths in GB 50018 and torsional effective lengths in AISI S100 be taken as the actual purlin length to prevent unsafe overestimation of capacity.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116163"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851430","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

Deformation-based buildability assessment of 3D printed concrete and its numerical simulation 基于变形的3D打印混凝土可建性评价及数值模拟

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-25 DOI: 10.1016/j.jobe.2026.116185

Avinaya Tripathi , Sooraj Nair , Subramaniam Rajan , Gaurav Sant , Narayanan Neithalath

{"title":"Deformation-based buildability assessment of 3D printed concrete and its numerical simulation","authors":"Avinaya Tripathi , Sooraj Nair , Subramaniam Rajan , Gaurav Sant , Narayanan Neithalath","doi":"10.1016/j.jobe.2026.116185","DOIUrl":"10.1016/j.jobe.2026.116185","url":null,"abstract":"<div><div>Buildability of 3D printed concrete depends on the ability of previously deposited layers to sustain increasing self-weight during printing. This study used digital image correlation (DIC) to monitor vertical and out-of-plane displacements in 3D printed wall elements made with normal-weight and lightweight mortars, with and without steel fibers, at different times after mixing. A failure initiation height was defined from the point at which the displacement response deviated from its initial linear trend, allowing impending failure to be identified before visible collapse. Combined interpretation of vertical and out-of-plane displacement histories enabled distinction between plastic collapse and buckling-dominated failure. The normal-weight mortars showed plastic collapse at earlier printing times and transitioned to buckling-dominated failure with increasing time after mixing, whereas the lightweight mortars exhibited higher buildability and predominantly buckling-dominated failure. The addition of a small fiber volume slightly reduced buildability in the lightweight mixture. Finite element simulations using time-dependent elastoplastic material properties were used to interpret vertical deformation trends rather than predict failure height. The simulations agreed well with measured displacements for plastic-yielding cases but overpredicted vertical displacements in buckling-dominated cases because out-of-plane instability was not included. These results show that DIC-based displacement tracking provides a non-contact framework for assessing buildability, detecting failure initiation as an early warning signal before visible collapse, and interpreting fresh-state failure mechanisms in 3D printed concrete.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116185"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147851405","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 assessment of the dynamic characteristics of masonry walls under incremental shake-table loading 增量振动台荷载作用下砌体墙体动力特性试验研究

IF 7.4 2区工程技术

Journal of building engineering Pub Date : 2026-05-01 Epub Date: 2026-04-24 DOI: 10.1016/j.jobe.2026.116165

Dawon Park, Sunwoo Kim, Hongwon Lee, Jung-Wuk Hong

{"title":"Experimental assessment of the dynamic characteristics of masonry walls under incremental shake-table loading","authors":"Dawon Park, Sunwoo Kim, Hongwon Lee, Jung-Wuk Hong","doi":"10.1016/j.jobe.2026.116165","DOIUrl":"10.1016/j.jobe.2026.116165","url":null,"abstract":"<div><div>Unreinforced masonry (URM) structures are highly vulnerable to seismic excitation due to their brittle behavior and limited energy dissipation capacity. Although many studies have examined their collapse mechanisms, few have experimentally quantified how dynamic properties degrade under progressive earthquake loading. This study fills this gap through incremental shaking table tests on four identical L-shaped freestanding URM fence-wall specimens with a fixed base and no top restraint, each subjected to sequential ground motion levels followed by resonance-search tests. The results show indicated ranges of up to 37.3% reduction in natural frequency and 58.2% reduction in frequency-response-function (FRF) magnitude in the out-of-plane direction of the long wall, reflecting significant stiffness loss and increased damping for this low-axial-load, freestanding configuration. Progressive corner cracking further induces modal decoupling between the long and short walls, transforming the system from coupled to independent responses. These quantified degradation trends provide benchmark data for model calibration and support the use of frequency- and amplitude-based diagnostics in post-earthquake evaluation and retrofit strategies for non-engineered masonry structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"125 ","pages":"Article 116165"},"PeriodicalIF":7.4,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850873","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