Construction and Building Materials最新文献

{"title":"Experimental study and theoretical analysis on mechanical properties of prestressed bolted glulam connections under cyclic loading","authors":"Man Xu ,&nbsp;Limin Zhou ,&nbsp;Shan Gao ,&nbsp;Qifang Xie ,&nbsp;Nan Guo","doi":"10.1016/j.conbuildmat.2024.139352","DOIUrl":"10.1016/j.conbuildmat.2024.139352","url":null,"abstract":"<div><div>Due to the development of assembled buildings and public environmental awareness, glulam structures have been widely concerned nowadays which have the advantages in terms of energy efficiency and environmental protection, compared with concrete and steel. However, the beam-to-column connections connected by bolts with slotted-in plates in glulam frame structures generally have some disadvantages, such as the low load-bearing capacity, low stiffness, low ductility, and poor energy dissipation capacity. To improve the mechanical performances of conventional glulam beam-to-column connections against seismic effect, a prestressed bolted glulam connection was proposed in this paper. Twelve connection specimens from four groups were tested and numerically studied under cyclic loading. The results show that the application of prestressing force can improve the brittle failure of connections. Compared with the traditional glulam bolted connections, the application of prestressing force can improve the load-bearing capacity, energy dissipation capacity, ductility and initial stiffness of the connection, and slow down the stiffness and strength degradation. However, excessive prestressing may cause an early failure of the connection. The numerical analysis shows that the bolt diameter and the number of steel bars have significant positive influence on the load-bearing capacity of the connection. Even though increasing bolt diameter would be more efficient for the mechanical behavior of the connection, the transverse splitting failure of glulam would be more likely to occur. A calculation formula for the load-bearing capacity and a theoretical model for the moment-rotation relationship of the prestressed bolted glulam beam-column connections are proposed respectively for practical design. The rotation behavior evaluation of the prestressed bolted glulam beam-column connections indicates that the proposed connections are classified as semi-rigid connections, which can be used for ductility design.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139352"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green and facile production of phase change composites supporting by carbonized rattan for thermal management","authors":"Shenjie Han ,&nbsp;Jingpeng Li ,&nbsp;Jian Zang ,&nbsp;Qingyun Ding ,&nbsp;Yun Lu","doi":"10.1016/j.conbuildmat.2024.139348","DOIUrl":"10.1016/j.conbuildmat.2024.139348","url":null,"abstract":"<div><div>Thermal energy management and storage are pivotal to promote economic expansion and industrial production, and the advancement of eco-friendly and convenient phase change material (PCM) production is imperative to confront the pressing issues surrounding energy sustainability. The exploration of rattan with naturally hierarchical pore structure encompassing slits, pits, vessels and sieve tubes, as a support material for the encapsulation of PCM has been investigated. Rattan stems (RS) with abundant macropores are eminently suited for the absorption of PCM. Moreover, carbonized rattan (CR), derived through the pyrolysis of RS, possesses a high proportion of micropores and mesopores, effectively preventing PCM leakage. The CR/paraffin phase change composite material (CPPM) attained a melting enthalpy of 113.50 J/g, a crystallization enthalpy of 112.50 J/g, and an encapsulation efficiency of 60.88 %. The leakage test revealed that CPPM maintained its structural integrity and demonstrated leak-proof performance. Photothermal conversion and energy storage experiments indicated that CPPM efficiently mitigated temperature fluctuations and exhibited substantial energy storage potential. Therefore, this research establishes CR as an optimal PCM multi-functional support, rendering it apt for practical applications in thermal energy management systems.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139348"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Compression behavior of CFRP strengthened sawdust-magnesium oxychloride composites columns subjected to eccentric loading","authors":"Peiyang Feng ,&nbsp;Huagang Zhang ,&nbsp;Qiang Fang ,&nbsp;Yuxin Qin ,&nbsp;Pan Ning","doi":"10.1016/j.conbuildmat.2024.139355","DOIUrl":"10.1016/j.conbuildmat.2024.139355","url":null,"abstract":"<div><div>Sawdust-magnesium oxychloride cement composites (SMOCC) are new low-carbon and environmentally friendly building material. Previous studies showed that SMOCC columns perform well under compression, but the addition of eccentricity could induce excessive tensile stress, which may cause premature failure to sawdust fibers. Many engineering applications showed that the use of carbon fiber reinforced polymer (CFRP) could effectively improve the mechanical properties of building components. However, the applicability and feasibility of CFRP in SMOCC columns have not been explored. To overcome this research gap, this paper investigates the working mechanism and reinforcement effectiveness of the CFRP strengthened SMOCC columns subjected to eccentric loading. A total of 16 specimens were designed and tested, the investigated parameters include the arrangement modes of CFRP strips and load eccentricity, whose effects on the failure mode, load capacity, ductility and strain behavior are described and discussed. Moreover, the prediction models were proposed to predict the ultimate bearing capacity of the SMOCC columns. The test results indicate that the strengthening technique was effective, particularly as the bearing capacities and ductility of the CFRP strengthened SMOCC columns increased by 39.40 %-104.38 % and 10.60 %-113.51 %, respectively, when compared with those of the un-strengthened SMOCC columns. Moreover, the enhancing effect increased with an increase in the number of the CFRP strips. As the eccentricity was increased from 10 mm to 30 mm, the CFRP strengthened SMOCC column’s bearing capacity and ductility slightly decreased by 19.99 %-21.24 % and 28.63 %-41.46 %, respectively, but the lateral deflection at the mid-height of columns significantly increased by 26.55 %-61.84 %. Strain distributions within the SMOCC column cross section showed linear variation showing compatibility with elastic bending theory. The results predicted using the proposed models showed good agreement with test results, where the errors are within 10 %.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139355"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new test to simulate asphalt crack development at particle contacts","authors":"Van Bich Nguyen ,&nbsp;Nick Thom ,&nbsp;Tung Hoang","doi":"10.1016/j.conbuildmat.2024.139360","DOIUrl":"10.1016/j.conbuildmat.2024.139360","url":null,"abstract":"<div><div>Fatigue cracking in a bituminous layer is caused by tensile strains induced by repeated traffic loading. It is also widely accepted that, in a bituminous mixture, fatigue cracking predominantly propagates through the bituminous binder. In this study, a new apparatus, called the Asphalt Particle Contact Test (APCT), was successfully developed to investigate the mechanical behaviour of the binder at particle contact points in asphalt mixtures. This new equipment was then used to evaluate one pure bitumen and two polymer-modified binders using different simulated shaped ends, tested under various temperatures and load levels. The results indicate that the APCT successfully simulates conditions at idealised particle contact points in asphalt mixtures, and the initiation and propagation of microcracks at and around the contact can reasonably be inferred. Predictions, based on a microcrack simulation model, were conducted and compared to APCT data, and agreements and discrepancies discussed.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139360"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal and hygrometric performances, and mold growth resistance, of novel bio-stitched insulating fiberboards made from date and Washingtonia palm surface fibers","authors":"Hamza Khallaf ,&nbsp;Hassan Chehouani ,&nbsp;Manal Lehmad ,&nbsp;Salma Bourht ,&nbsp;Brahim Benhamou","doi":"10.1016/j.conbuildmat.2024.139323","DOIUrl":"10.1016/j.conbuildmat.2024.139323","url":null,"abstract":"<div><div>This paper evaluates the performance of a novel bio-stitched, lightweight insulating fiberboards made from <em>Phoenix dactylifera L.</em> and <em>Washingtonia filifera</em> palm fiber waste. These materials are binder-free, rendering them fully biodegradable. In this study, measurements are made of water sorption and its impact on density and thermal conductivity. Both materials exhibited insulating properties, with thermal conductivity values ranging from 0.043 to 0.063 W.m⁻¹.K⁻¹ depending on density. The bio-stitched fiberboards achieved their lowest thermal conductivity at an optimum density of 85–105 kg.m⁻³. The results indicate also that the thermal conductivity and density of bio-stitched fiberboards increase significantly with volumetric water content. However, even at saturation, they retain competitive thermal insulation properties. The residual fibers used were subjected to different natural weathering durations. Three types of fiber were therefore evaluated: one fresh, one moderately weathered and the other extremely weathered, in an attempt to compare the hygrothermal properties of the elaborated fiberboards as a function of fiber conditioning. It was found that Washingtonia palm surface fiberboards have higher water absorption compared to weathered date palm surface fiberboards. In addition, mold growth was evaluated by exposing the fiberboards to severe relative humidity conditions, i.e., 74 % RH, 77 % RH, 86 % RH, and 94 % RH at 29ºC. It was observed that the proliferation of mold was slow, particularly on weathered fiberboards, while it remained moderate on the surface of fresh Washingtonia palm surface fiberboards.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139323"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of different water reducing agents on mechanical properties and micro-mechanism of modified hemihydrate phosphogypsum cementitious materials","authors":"Qin Wu ,&nbsp;Qijun Long ,&nbsp;Jia Tao ,&nbsp;Huagang Zhang ,&nbsp;Chuanxiang Chen ,&nbsp;Jianxiang Wang ,&nbsp;Fang Yu","doi":"10.1016/j.conbuildmat.2024.139390","DOIUrl":"10.1016/j.conbuildmat.2024.139390","url":null,"abstract":"<div><div>The stockpiling of industrial by-product phosphogypsum causes pollution to the environment, and its effective utilization can be achieved by using cementitious materials from undisturbed hemihydrate phosphogypsum (UHPG) obtained by hemihydrate-wet process. This study investigated the creation of modified hemihydrate phosphogypsum mixture by proportionally blending quicklime with UHPG. Modified hemihydrate phosphogypsum cementitious material (MPGCM) was then prepared using melamine superplasticizer (SM) or naphthalene superplasticizer (FDN). The effects of these water reducing agents on the mechanical properties and micro-mechanisms of MPGCM were evaluated by single-factor experimental method. The results showed that both SM and FDN were effective in reducing water consumption and enhancing the fluidity of MPGCM. Additionally, both superplasticizers delayed the establishment of the MPGCM, with FDN showing a stronger retarding effect than SM. Compared with those mixed with FDN, the specimens mixed with SM exhibited markedly greater flexural and compressive strengths. The specimens with 2 % SM content achieved the highest 28 d flexural strength and compressive strength, measuring 16.61 MPa and 42.26 MPa. Microscopic analysis revealed that the water reducing agent can not only inhibit the disaggregation and dissolution of calcium sulfate hemihydrate and the crystallization of calcium sulfate dihydrate, but also promote the transformation of calcium sulfate dihydrate crystals from long rods to short columns or plates, so that the reticular structure is more compact and the mechanical strength is improved. This study suggests that the optimal composition, consisting of 97 % UHPG, 3 % quicklime, and 2 % SM, yields the optimum mechanical properties. These results provide a theoretical foundation for the application of phosphogypsum in practical engineering and support the sustainable development of phosphorus chemical industries.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139390"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Activation of ultra-fine steel slag and ground granulated blast furnace slag in alkaline waste solutions via phosphogypsum and calcium carbide slag","authors":"Rui Guo ,&nbsp;Caihong Xue ,&nbsp;Qiu Li ,&nbsp;Weichao Guo ,&nbsp;Huimin Pan ,&nbsp;Qingxin Zhao","doi":"10.1016/j.conbuildmat.2024.139333","DOIUrl":"10.1016/j.conbuildmat.2024.139333","url":null,"abstract":"<div><div>This study expands the ways of utilizing multiple solid wastes. The pH value of SRL (soda residue liquid) closely matches that of the cement pore solution, making it a viable substitute for tap water in mixing. Purified PG (phosphogypsum) can serve as an alternative to traditional sulfate activators. CS (calcium carbide slag), currently serves as a widely utilized alkaline activator. PG and CS synergistically activate GGBFS (ground granulated blast furnace slag) in the presence of SS (steel slag) within the SRL environment. A synergistic effect is observed between SS and GGBFS. The test results demonstrate that the composite system achieves a 28-day strength of up to 60 MPa. The effect of SS content on the hydration kinetics, setting time, compressive strength was investigated. To elucidate the role of SS and PG in the reaction, the hydration products were characterized with TGA, XRD and SEM-EDS. The results suggest that the Cl^- in SRL undergoes effective immobilization within the system, thereby filling the gel pores as Friedel’s salt (Fs) and facilitating the formation of a dense structure. Q-XRD coupled with TGA was utilized to analyze the changes in crystalline and non-crystalline phases within the system, revealing the hydration mechanism of steel slag activated by physical, chemical, and mineral factors in an alkaline waste solution environment.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139333"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of fiber alignment through combined driven oscillatory and directional magnetic fields in matrix with similar rheological behavior to cementitious materials","authors":"Nelson Flores Medina ,&nbsp;Laura Trigo Ramirez ,&nbsp;Víctor Pérez Villar ,&nbsp;Víctor M. Cabrera García ,&nbsp;Francisco Gil Carrillo","doi":"10.1016/j.conbuildmat.2024.139210","DOIUrl":"10.1016/j.conbuildmat.2024.139210","url":null,"abstract":"<div><div>In this paper a novel method to improve the effectiveness of the aligning of fibers used as reinforcement in Fiber Reinforced Cementitious Composites (FRCC) through directional homogeneous magnetic fields is proposed. A combination of homogeneous magnetic fields, oscillatory and directional, are assessed as a new method for fiber aligning which increase the aligning index and mechanical efficiency index of the fiber in cementitious composites. Fresh cementitious materials present a Static Yield Stress (T₀^s), which must be overpassed to allow the rotation of the fiber immersed in the matrix. To reduce the T₀^s of the matrix, oscillatory magnetic fields (OMF) are applied firstly, as they generate a vibrational strain of the fiber. Later, fibers are aligned through a directional magnetic field which finds a lower opposition of the rheological torque. The fibers are subjected to an orientation rotation caused by the magnetic field, which is caused by a magnetic torque. This torque is opposed by two torques, one of rheological origin (Yield stress and viscosity) and another of inertial type (geometry and mass distribution of the fiber). The rheological torque is the torque that opposes to the rotation of the fiber and is a function of the rheological properties of the matrix. Two pairs of Helmholt coils have been used in this research, to be able to generate orthogonal magnetic fields to directional magnetic fields. When the OMF was generated, one of the pair of coils were connected to the net, with a frequency of 50 Hz. OMF was performed in 0.64mT-1.25mT-2.18mT. To evaluate its effectiveness each of them was applied in periods of time of 2–5–7–10 seconds before the directional magnetic field of 30 mT. To assess the method steel fibers has been submerged in a metaphor fluid to reproduce the rheological properties of cement materials. The initial and final angles of the batch of fibers have been determined through photography and Computer-aided design. The results obtained shown that the use of OMF increases the alignment index up to 35 % and the mechanical efficiency rate up to 24.35 % in the batches studied. The research followed also showed that previous vibration can be applied during periods of 5 seconds, with the same pair of coils that for aligning but also the use of the two pair of coils can be used simultaneously.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139210"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recycling biopolymer stabilised earthen construction materials using β-mannanase","authors":"S. Muguda,&nbsp;M. Wyndham","doi":"10.1016/j.conbuildmat.2024.139334","DOIUrl":"10.1016/j.conbuildmat.2024.139334","url":null,"abstract":"<div><div>Biopolymers like guar and xanthan gums are considered to be sustainable soil stabilisers that can improve engineering properties of earthen construction materials. Recent studies indicate that water-based soil washing has achieved partial success in recycling these materials. In this study, β-mannanase was used in the washing process for recycling. An engineered soil mixture was stabilised using these biopolymers and then recycled in two stages, initially with water and then with β-mannanase. The impact of recycling was ascertained in terms of particle size distribution and Atterberg limits. The recycled soil was subsequently used to produce earthen construction materials, and their mechanical performance was evaluated. Two recycling cycles were conducted to explore the potential of recycling after repeated cycles of biopolymer amendment. Using β-mannanase proved effective in recovering more original material than washing with water and notably more effective for guar gum. Mechanical tests indicated that the recycled material was suitable for earthen construction.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139334"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Full-scale testing of the bending behaviour of UHPC gravity–grouted sleeve–prestressed anchor joints in assembled frame tunnels","authors":"Zhen Huang ,&nbsp;Kui Wang ,&nbsp;Ying Liu ,&nbsp;Wenjun Zhang ,&nbsp;Chen Cao","doi":"10.1016/j.conbuildmat.2024.139403","DOIUrl":"10.1016/j.conbuildmat.2024.139403","url":null,"abstract":"<div><div>Joints are weak parts of a prefabricated tunnel frame structure, and the joint bending resistance is a crucial factor controlling the deformation and bearing capacity of the tunnel structure. This study proposes a joint with dual anchoring of ultrahigh-performance concrete (UHPC) gravity-grouted sleeves and prestressed steel reinforcement. The material strain, opening amount, deflection, stiffness, rotation angle, and ductility of the grouted sleeve-prestressed anchor joint and grouted sleeve joint types were tested through full-scale bending tests, and with the help of noncontact measurement technology, the dynamic process of joint bending failure was captured. In addition, the finite element method was used to evaluate the influences of the prestressing magnitude and the position of the prestressing steel bars on the bending performance of the joints. The results indicate that the damage to the concrete joint is concentrated at the top of the joint and that the damage to the top surface of the joint concrete is distributed in an \"m\" shape, indicating that the damage to the concrete in the area between the sleeves is relatively extensive. Owing to the turning points of grouting material fracture and joint yielding, the joint bending process clearly shows a three-stage change. The grouted sleeve-prestressed anchor joint exhibits greater bending stiffness than the grouted sleeve joint does, and the slip of the grouting material in the sleeve is smaller. Prestressing plays a key role in enhancing the bearing capacity and deformation resistance of joints. Considering that excessive prestress may increase the brittleness of the structure, the prestress of the grouted sleeve-prestressed anchor joint is recommended to be 200 kN. This study provides theoretical support for the joint design and construction of prefabricated tunnel frame structures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"457 ","pages":"Article 139403"},"PeriodicalIF":7.4,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}