装配式轻质隔墙板的数值分析及优化设计
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摘要
装配式预制构件优化设计是建筑产品节能、环保、全生命周期价值最大化的基础.为使装配式轻质隔墙板在满足力学性能、保温隔热性能和预制简单等条件下获得最优结构,对新型装配式轻质隔墙板进行了数值分析及优化设计.基于标准化隔墙板,将圆形孔洞调整为椭圆形孔洞,通过数值分析比较了两种隔墙板(圆形截面和椭圆形截面)的受力性能和保温隔热性能.考虑施工和使用过程可能出现的荷载模式,对隔墙板的整体刚度和薄弱点的应力集中效应进行了分析.通过设定热参数,比较了两种隔墙板在密闭空间内的降温时间.结果表明,采用椭圆形孔洞隔墙板不仅自身质量减少5. 6%,孔洞应力集中效应也有一定程度减小,其保温性能比圆形孔洞隔墙板提升了12%.
The optimum design of the prefabricated components is the foundation of energy saving,environmental protection and maximum life cycle value of building products. In this paper,the numerical analysis and optimum design of a new type of lightweight partition board are carried out to meet the requirements of mechanical properties,thermal transferring and simple prefabrication. Based on the standard partition board and numerical analysis,the circular cross section type partition board is modified to the elliptical cross section type. The numerical analysis is carried out to compare two types of partition plates( circular section and elliptical cross section) with respect to the mechanical performance and heat transfer performance. Among them,load modes which may occur in construction and service stage,are used to study the mechanical properties,effect of stress concentration and overall partition board stiffness. The heat transfer performance analysis is also done to compare the cooling time for the two kinds of partition boards in the confined space. The numerical analysis results show that the elliptical partition board not only reduces its weight by 5. 6%,but also reduces the stress concentration effect of the hole to a certain extent. The thermal transferring performance of the elliptical partition board is 12% higher than that of the circular partition plate.
The optimum design of the prefabricated components is the foundation of energy saving,environmental protection and maximum life cycle value of building products. In this paper,the numerical analysis and optimum design of a new type of lightweight partition board are carried out to meet the requirements of mechanical properties,thermal transferring and simple prefabrication. Based on the standard partition board and numerical analysis,the circular cross section type partition board is modified to the elliptical cross section type. The numerical analysis is carried out to compare two types of partition plates( circular section and elliptical cross section) with respect to the mechanical performance and heat transfer performance. Among them,load modes which may occur in construction and service stage,are used to study the mechanical properties,effect of stress concentration and overall partition board stiffness. The heat transfer performance analysis is also done to compare the cooling time for the two kinds of partition boards in the confined space. The numerical analysis results show that the elliptical partition board not only reduces its weight by 5. 6%,but also reduces the stress concentration effect of the hole to a certain extent. The thermal transferring performance of the elliptical partition board is 12% higher than that of the circular partition plate.
引文
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[2]MATEUS R,NEIVA S,BRAGANL,et al. Sustainability assessment of an innovative lightweight building technology for partition walls:omparison with conventional technologies[J]. Building and Environment,2013,67:147-159.
[3]LIU Y W,PAN H H,CHANG C S,et al. Properties of coconutfiber/rubber cement board for building partitions[J]. Advanced Materials Research,2011,1452:101-110.
[4]杨烨,靳金平.支承轻质隔墙的混凝土楼板受力特征分析[J].建筑结构,2012(S2):451-453.YANG Ye,JIN Jinping. Research on stress characteristics of reinforced concrete slab supporting light-weight partition wall[J]. Building Structure,2012(S2):451-453.(in Chinese)
[5]谢芝馨.轻质隔墙板物理力学性能分析[J].福州大学学报自然科学版,1999(3):56-59.XIE Zhixin, An analysis on physical mechanics performance of light weight partition board[J]. Journal of University of Fuzhou Natural Science,1999(3):56-59.(in Chinese)
[6]HUANG S,LI Z,CHEN Z,et al. Study on the elasticplastic behavior of a porous hierarchical bioscaffold used for bone regeneration[J]. Materials Letters,2013,112:43-46.
[7]CHEN Q,HUANG S. Mechanical properties of a porous bioscaffold with hierarchy[J]. Materials Letters,2013,95:89-92.
[8]ZHANG J,ZHANG W,ZHANG H,et al. A novel synthesis of hierarchical porous carbons from resol by potassium acetate activation for high performance supercapacitor electrodes[J]. Journal of Alloys and Compounds,2017,712:76-81.
[9]HUANG S,HU M,HUANG Y,et al. A new model for optimal mechanical and thermal performance of cementbased partition wall[J]. Materials,2018,11(4):615-618.
[10]石亦平,周玉蓉. ABAQUS有限元分析实例详解[M].北京:机械工业出版社.SHI Yiping, ZHOU Yurong. An example of ABAQUS finite element analysis[M]. Beijing:Mechanical Industry Press.(in Chinese)
[11]JG/T 169—2016建筑隔墙用轻质条板通用技术要求[S].JG/T 169—2016 General technical requirements for lightweight panels used in building partitions[S].(in Chinese)
[12]徐春雷. GRC轻质隔墙板的构造及施工工艺[J].施工技术,2008(S1):337-339.XU Chunlei. Structure and construction technology of GRC light-weight partition board[J]. Construction Technology,2008(S1):337-339.(in Chinese)
[13]刘鸿文.材料力学[M].北京:高等教育出版社,2004.LIU Hongwen. Mechanics of materials[M]. Beijing:Higher Education Press,2004.(in Chinese)
[14]张建荣,刘照球.混凝土对流换热系数的风洞实验研究[J].土木工程学报,2006(9):39-42.ZHANG Jianrong,LIU Zhaoqiu. A study on the convective heat transfer coefficient of concrete in wind tunnel experiment[J]. China Civil Engineering Journal,2006(9):39-42.(in Chinese)
[15]WANG L,ZHANG Z L,PANG S J. Analysis and probe of the causes and solution of cracks of precast concrete lightweight partition board[J]. Advanced Materials Research,2014,3295:16-25.
[16]张俊,李昌贤,朱永刚.玻纤增强水泥砂浆(GRC)轻质隔墙板裂缝防治技术[J].混凝土,2011(8):123-124.ZHANG Jun,LI Changxian,ZHU Yonggang. Investigation of cracking resistance of GRC light weight wall and its application[J]. Concrete,2011(8):123-124.(in Chinese)
[17]贾华远,李建业,郑林进,等.清水GRC墙板裂缝预控技术[J].建筑技术,2003(9):682-683.JIA Huayuan,LI jianye,ZHENG Linjin,et al. Control technology of as-cast-finish GRC wall panel cracks[J].Architecture Technology,2003(9):682-683.(in Chinese)