Journal of building engineering最新文献

{"title":"Lateral performance of traditional Chinese penetrated mortise-tenon frames: Experimental and numerical simulation","authors":"Leilei Liu, Xicheng Zhang, Yiwen Wu","doi":"10.1016/j.jobe.2025.112691","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112691","url":null,"abstract":"The timber frame is the primary lateral load-resisting component in traditional Chinese timber structures. However, its limited lateral performance may lead to significant structural damage or even collapse under seismic action. Three scaled specimens of penetrated mortise-tenon frame (PMTF) were fabricated and tested under low-cyclic reversed loading to evaluate the lateral performance. This study investigates the failure modes, hysteretic behavior, skeleton curves, stiffness degradation, energy dissipation, and deformation capacities of the PMTF specimens. Based on the experimental results, a restoring force model that accounts for stiffness degradation is proposed for the PMTF. A numerical analysis model of the PMTF was established in OpenSees and validated through comparisons with experimental data. Dynamic analyses were conducted to assess the seismic performance of the PMTF. The results indicate that failure in the mortise-tenon joints primarily manifests as the longitudinal splitting of the timber at the tenon section change, tenon compression deformation, and mortise cracking. During cyclic loading, tenon pull-out becomes particularly noticeable, with a maximum pull-out length of approximately 23.68 mm. The hysteresis curve of the PMTF exhibits a reverse “Z” shape, demonstrating pronounced pinching behavior. As lateral displacement increases, the plastic deformation between the tenon and mortise and the longitudinal splitting of the timber at the tenon section change both intensify, leading to a significant reduction in the lateral stiffness of the PMTF. The established numerical analysis model accurately simulates the hysteretic behavior of the PMTF. The PMTF exhibits superior seismic performance and energy dissipation ability, with inter-story drift angles of 2.23 % and 2.25 % under MCE conditions, respectively. Additionally, the dynamic analysis results show that both the column height and the axial load at the column top significantly influence the seismic performance of the PMTF.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"11 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853616","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}

{"title":"Flexural properties and damage evolution laws of scrap tire steel fiber-reinforced constructional backfill body","authors":"Chiyuan Che, Shenggen Cao, Yun Zhang, Changzheng Zhao, Shuyu Du, Ruiting Ma, Kaifei Wang, Yang Liu","doi":"10.1016/j.jobe.2025.112700","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112700","url":null,"abstract":"The constructional backfill body (CBB) serves as an underground mining structure intended to form a stable void space within the goaf. However, CBB typically exhibits high brittleness and poor flexural performance. In this study, scrap tire steel fiber (SSF) was utilized to enhance the properties of CBB, and the effects of varying SSF dosages (0 %, 0.5 %, 1 %, and 1.5 %) on the three-point flexural properties and the damage evolution of the scrap tire steel fiber-reinforced constructional backfill body (SSF-reinforced CBB) were investigated. The results indicated that incorporating 1 % SSF significantly enhanced the mechanical properties of CBB. Specifically, the initial cracking flexural strength, peak flexural strength, initial cracking deflection, peak deflection, stiffness, initial cracking toughness and peak toughness of the modified CBB increased by 70.99 %, 55.72 %, 19.05 %, 19.61 %, 104.86 %, 60 %, and 100 %, respectively; the toughness at post-peak load (50 % of the peak load) of increased by 655 % compared to the control group. This indicates that 1 % dosage of SSF optimally enhances damage tolerance in the tested materials. Acoustic emission testing results showed that the incorporation of SSF significantly reduced both the ringing count and the fluctuation amplitude of the <ce:italic>b-</ce:italic>value during the fracture of the CBB, indicating that the addition of SSF can enhance the crack-resisting capabilities of the CBB. However, incorporating excessive SSF may lead to the formation of weak structural planes within the SSF-reinforced CBB, thereby reducing its flexural performance and damage resistance. Therefore, the optimal dosage of SSF in engineering applications is recommended to be 1 %.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"9 2 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853614","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}

{"title":"Experimental study on seismic performance of an innovative modular steel building connection with cross-shaped plug-in connector","authors":"Hongwei Ma ,&nbsp;Ziming Huang ,&nbsp;Wei Xiong ,&nbsp;Tao Zhang ,&nbsp;Jinyi Zhu ,&nbsp;Xiongbin Song ,&nbsp;Zhongyi He ,&nbsp;Yuhong Ling ,&nbsp;Guoqing Huang","doi":"10.1016/j.jobe.2025.112679","DOIUrl":"10.1016/j.jobe.2025.112679","url":null,"abstract":"<div><div>Modular steel buildings represent a significant advancement in industrialized construction, facilitated by the evolution of inter-module connection (IMC) technology, enabling the adaptation of modular building systems for multi-story and high-rise buildings. In this study, an innovative internal IMC comprising a cross-shaped plug-in connector, column end plates, side plates and bolts is proposed. The full-scale cross-shaped IMC specimen underwent quasi-static seismic performance testing with top column-end lateral loading method, examining its failure mode, stiffness, strength, ductility, energy dissipation capacity and strain characteristics. Test results showed that the proposed IMC has moderate ductility and energy dissipation capacity, classifying the IMC as semi-rigid and partial strength connection according to Eurocode 3. In addition, the theoretical mechanical model of the IMC is presented, and the horizontal yield load based on the simplified mechanical model is accurately estimated by the approximate second-order theory specified in Chinese standard for design of steel structures. Furthermore, applying the seismic performance-based design method of high bearing capacity-low ductility stipulated in the Chinese code, a reduction coefficient of the ultimate flexural bearing capacity of module beams is proposed for the IMC's flexural bearing capacity assessment with corresponding design recommendations.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112679"},"PeriodicalIF":6.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877242","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}

{"title":"Low carbon regional energy management system with conditional value at risk","authors":"Xiaohua Zhang ,&nbsp;Junyan Lyu ,&nbsp;Zhenfan Wang ,&nbsp;Yifu Li ,&nbsp;Kuiheng Deng ,&nbsp;Payman Dehghanian ,&nbsp;Bolin Chen","doi":"10.1016/j.jobe.2025.112572","DOIUrl":"10.1016/j.jobe.2025.112572","url":null,"abstract":"<div><div>Regional energy systems are widely used to collect and uniformly manage the energy consumption within individual districts. This paper proposes a novel framework for a regional energy system, featuring five districts within one region, aimed at reducing both regional energy cost and carbon emissions, while taking into account the Conditional Value at Risk (CVaR). The energy consumption models are developed for residential and commercial areas, incorporating variables like electric vehicle (EV) usage, photovoltaic (PV) output, and energy storage. A Regional Energy Management System (REMS) is designed to set dynamic transaction prices and optimize revenue and risk indicators. Using Stackelberg game theory and Karush–Kuhn–Tucker conditions, the regional energy objective is unified into a mixed-integer linear programming problem with CVaR, considering EV and PV risks. The Carbon Emission Intensity (CEI) is updated analytically, and REMS determines dynamic transaction prices and manages consumption across districts. Numerical results demonstrate that the proposed REMS framework with CVaR risk considerations significantly reduces both regional energy costs and carbon emissions. Additionally, the updating of CEI is found to notably impact the regional carbon emissions. This paper provides valuable guidance on quantifying districts energy interaction risk, reducing regional building energy consumption and carbon emissions under EVs extensive using for regions.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112572"},"PeriodicalIF":6.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864465","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}

{"title":"Strength monitoring and prediction of blended concrete systems from very early to delayed curing age using embedded piezo sensor data: An experimental and machine learning approach","authors":"Ramesh Gomasa ,&nbsp;Visalakshi Talakokula ,&nbsp;Sri Kalyana Rama Jyosyula ,&nbsp;Tushar Bansal","doi":"10.1016/j.jobe.2025.112677","DOIUrl":"10.1016/j.jobe.2025.112677","url":null,"abstract":"<div><div>Concrete structures form the backbone of modern infrastructure, offering essential support for housing, water management and transportation systems. Effective monitoring of concrete strength development is essential to ensure safety and prevent damage during the construction phase. This study comprehensively evaluated the strength development of three blended concrete systems from very early (1–24 h), early age (1–5 days), later age (6–28 days) and delayed curing age (30–90 days) using an embedded piezo sensor (EPS), along with non-destructive, destructive tests, and a machine learning (ML) approach. The concrete mixtures incorporate fine and coarse aggregates along with Portland pozzolana cement (PPC), concrete enhancer (CE), and slag. Experimental results indicate that concrete prepared with PPC + CE + slag achieves the highest compressive strength, followed by concrete with PPC + CE, while PPC alone exhibits the lowest strength. EPS monitors phase transitions and strength development in blended concrete systems through observable shifts in conductance signatures, offering non-destructive insights into structural changes and strength development. Statistical and equivalent stiffness analysis further confirms the higher strength development in the PSC-C system followed by PC-C and PPC-C systems. Furthermore, various ML models are employed for strength prediction, with the random forest (RF) model demonstrating the highest accuracy of 0.97. Overall, EPS data provides a reliable non-destructive indicator of strength in blended concrete systems, while its integration with ML models enhances strength prediction capabilities. This approach advances the understanding of strength development during the curing process and provides valuable insights for contractors, engineers and researchers in the construction of sustainable concrete structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112677"},"PeriodicalIF":6.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864370","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}

{"title":"Fire-insulation properties of recycled aggregate concrete, its application in composite concrete structures, and concrete-concrete interface effects: a review","authors":"Zixuan Chen ,&nbsp;Jianzhuang Xiao","doi":"10.1016/j.jobe.2025.112681","DOIUrl":"10.1016/j.jobe.2025.112681","url":null,"abstract":"<div><div>Cement-based materials inherently face a conflict between load-bearing capacity and fire resistance. To address this issue, combined using several types of concrete has the potential to improve both mechanical and fire performance. Therefore, this paper focuses on the composite concrete structures, particularly the fire performance of those incorporating recycled aggregate concrete (RAC), and explores their future development. This study considers three main aspects: the properties of RAC, composite concrete structures, and the concrete-concrete interface. The findings indicate that RAC exhibits excellent fire-insulation properties due to its lower thermal conductivity. The use of RAC in composite concrete structures can effectively enhance fire resistance while having a limited impact on mechanics. The bonding properties of discontinuous concrete-concrete interface in composite concrete structures significantly decreases when exposed to elevated temperatures, which may adversely affect structural integrity and requires attention. In summary, this paper provides a comprehensive understanding of the thermal insulation properties of RAC, thereby promoting its application in composite concrete structures and offering a viable approach to enhancing the fire resistance of concrete structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112681"},"PeriodicalIF":6.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868489","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}

{"title":"Early-strength mechanisms, carbon sequestration, and phytocompatibility of ecological porous concrete synergistically modified with triethanolamine and nano-silica: Hydration kinetics and microstructural mechanisms","authors":"Yangyi Zhu,&nbsp;Jian Yin,&nbsp;Sijiao Li,&nbsp;Sizhe Liu,&nbsp;Shuai He,&nbsp;Yihao Chen","doi":"10.1016/j.jobe.2025.112669","DOIUrl":"10.1016/j.jobe.2025.112669","url":null,"abstract":"<div><div>To address the specific demands for early-strength materials in ecological slope emergency restoration projects and ecological slope construction in cold regions, this study has developed Ecological Porous Concrete (EPC) with low-alkali characteristics and enhanced early-strength advantages through a synergistic mechanism of alkalinity regulation and strength enhancement. This provides new material support for advancing the ecological restoration technology system within the context of carbon neutrality. In this study, we systematically investigated the influences of triethanolamine (TEA) and nano-silica (NS) on the mechanical properties and CO₂ absorption capacity of EPC cementitious materials. The results indicate that the incorporation of TEA and NS effectively mitigates the issue of reduced early strength in EPC caused by oxalic acid, leading to a significant improvement of 33.3 % in the early mechanical properties. Furthermore, the addition of TEA and NS promotes crystal nucleation and growth during the hydration reaction of EPC cementitious materials, facilitating the transition from the nucleation and growth (NG) process to the impingement (I) process, and enhances the CO₂ sequestration capacity of the EPC cementitious materials. Planting tests demonstrate that the early-strength EPC exhibits excellent vegetation performance, fulfilling the practical needs of the project. These research findings offer robust technical support for accelerating the construction speed of EPC and ensuring project quality. They are of considerable significance in promoting the industrialized application of EPC in green building and ecological restoration fields, particularly in cold region engineering and emergency ecological slope restoration projects.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112669"},"PeriodicalIF":6.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859770","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}

{"title":"Assessing the effect of particle characteristics on the rheological properties of mortar with recycled fine aggregate","authors":"Qi Deng ,&nbsp;Yutong Zhuang ,&nbsp;Ahmed Nasr ,&nbsp;Hengrui Liu ,&nbsp;Zhenhua Duan","doi":"10.1016/j.jobe.2025.112673","DOIUrl":"10.1016/j.jobe.2025.112673","url":null,"abstract":"<div><div>This study systematically investigates the impact of recycled fine aggregates’ (RFA) particle characteristics on the rheological behavior of mortar mixtures by direct testing, theoretical calculations, and dynamic analysis. First, key parameters of RFA were quantitatively assessed, including time-dependent water absorption, packing density, and particle morphology. The rheological performance of mortar mixtures, containing varying RFA volume fractions and saturation levels, was examined according to these particle properties. Dynamic analysis, based on the relationship between rheological parameters and solid particle content, was employed to determine the dynamic packing fraction of RFA in shear flow. Additionally, the interactions between RFA and cement were considered, and the overall packing fraction of the particle system was evaluated using the compressible packing model (CPM). The results indicate that RFA exhibits high water absorption and rapid absorption kinetics, along with a distinct non-spherical morphology, leading to a low packing density. The water absorption of unsaturated RFA is strongly correlated with the water-to-cement ratio of the paste. Dynamic analysis effectively describes the influence of particle parameters on rheology, with the fitted packing fractions slightly higher than the measured values. The theoretical calculations based on CPM indicate that the packing fraction of the particle system exhibits a trend of increasing first and then decreasing with respect to the volume ratio of RFA to cement (A/C), reaching its peak when A/C is 1.3896. This relationship can be used to rapidly assess the impact of the particle system on the rheological behavior of the mixture. The methodology employed in this study provides new insights into the mix proportion design of cement-based materials and promotes the broader application of RFA.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112673"},"PeriodicalIF":6.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864371","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}

{"title":"Evaluation of the seismic performance of prestressed precast coupled walls with friction coupling beams: experiments and theoretical behaviors","authors":"Yong Zhao, Jingwei Gao, Yong Zhang, Bin Zeng, Chun-Lin Wang","doi":"10.1016/j.jobe.2025.112656","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112656","url":null,"abstract":"The improvement of seismic toughness is one of research focuses on coupled shear walls. In this paper, a prestressed precast coupled wall with friction coupling beams (PPCW-FCB) was assembled, in which the prestressed tendons mainly provided lateral resistance and self-centering capability, and the friction coupling beams (FCB) provided energy dissipation capacity. Based on the quasi-static tests of three specimens, the effects of FCBs on the deformation characteristics and seismic performance of PPCW-FCBs were analyzed. The test results showed that after three loadings, only small cracks appeared within the height of the bottom FCB; the friction pads suffered from streak abrasion, but there was no obvious plastic deformation on the bolts and hole wall in the steel plate of FCBs, which was conducive to rapid repair after an earthquake. The FCBs were beneficial to improving the load and seismic performance of prestressed precast coupled walls. In detail, compared with the specimen without FCBs, the initial stiffness and load capacity of PPCW-FCB specimens increased by 196 % and 61 % on average, respectively; the equivalent viscous damping ratio and relative energy dissipation ratio increased by 266 % and 249 % on average, respectively. Based on the key performance points of gap opening, friction start, design state and ultimate state, a theoretical skeleton curve for the load-drift response of PPCW-FCBs was established. The theoretical skeleton curve formed a good envelope for the experimental load-drift responses, where the average deviation between the experimental and theoretical results at design state was only 6.6 %.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"17 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853615","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}

{"title":"An ANN-GA optimization method for building clusters based on wind-induced vulnerability","authors":"Bo Chen, Wei Li, Linfei Jiang, Lu Zhang, Yi Hui, Qingshan Yang","doi":"10.1016/j.jobe.2025.112696","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.112696","url":null,"abstract":"Optimizing the building parameters of low/high-rise building clusters using wind-induced vulnerability (WIV) is valuable for minimizing building envelope damage losses due to strong winds and windborne debris. In general, the building parameters with the minimum WIV from typical scenarios are selected as the optimal ones. However, due to the multitude of parameter variables influencing the WIV of building clusters, such as roof slope, building spacing, building orientation, aerodynamic mitigations, etc., the vast number of parameter scenarios across various wind directions required makes it difficult to determine the optimal building parameters (OBPs) by enumerating the WIV for each scenario. To address this issue, this study proposes a novel artificial neural network (ANN)-genetic algorithm (GA) optimization method based on WIV to efficiently obtain the OBPs of building clusters. This ANN-GA method involves three steps: first, establish an ANN surrogate model to predict extreme wind loads for building clusters with different building parameters; second, perform WIV analysis after incorporating the models for wind-induced roof panel damage and windborne debris damage to windows and considering the uncertainties in wind speed and direction; and third, optimize the building parameters of the building clusters using the GA. To validate the effectiveness of the proposed method, an optimization case study is conducted for the orientation and spacing of a typical row of three gable-roof buildings. The findings demonstrate that the proposed ANN-GA optimization method can efficiently solve complex multivariable optimization problems of building clusters to find the OBPs and achieve a lower wind-induced economic loss for building clusters. For scenarios with fixed building orientations, the wind-induced loss with the optimal spacing determined using the ANN-GA method is reduced by 59.95 %–88.87 % compared to that with the most unfavorable spacing. Compared to selecting the OBPs from typical scenarios, the ANN-GA optimization method can achieve a further reduction in wind-induced loss by 2.21 %–3.39 %.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"34 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853617","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}