| 引用本文: | 赵建军,付佳欣,李爽.岩棉复合保温外模板承载力及温度效应分析[J].哈尔滨工业大学学报,2024,56(1):130.DOI:10.11918/202209006 |
| ZHAO Jianjun,FU Jiaxin,LI Shuang.Bearing capacity and temperature effect of rock wool composite insulation external formwork[J].Journal of Harbin Institute of Technology,2024,56(1):130.DOI:10.11918/202209006 |
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| 摘要: |
| 为了提高建筑外围护结构施工效率及解决传统外保温系统长期存在的易脱落和易着火问题,提出了一种集保温和建筑模板于一体的岩棉复合保温外模板（RWCIEF）体系。RWCIEF由内到外依次为内侧加强层、岩棉保温芯材、黏结层、保温过渡层以及外侧加强层。以哈尔滨市为例,基于全寿命周期成本（life cycle cost,Clc）确定了岩棉保温芯材的最佳厚度。采用有限元分析与理论计算相结合的方法探求了RWCIEF在工程中的可行性,分析了RWCIEF的抗弯性能、施工承载力及温度效应下的应力和变形,讨论了开槽形式、开槽宽度、开槽深度以及开槽间距对RWCIEF抗弯性能的影响。结果表明:RWCIEF的抗弯性能理论计算结果与有限元分析结果有较高的一致性；开槽处理可有效提高RWCIEF的抗弯性能,综合抗弯性能、热工特性及加工角度,建议开槽形式选用对应开井字槽或对应开纵槽,开槽深度和宽度均为10 mm,开槽间距 为150 mm;设计的RWCIEF满足施工承载力,可保证外围护结构保温工程施工质量;由温度效应产生的最大拉应力和压应力均未超过RWCIEF的外侧加强层承载力,反映出RWCIEF出现夏季空鼓或冬季开裂现象的可能性极小。提出的RWCIEF体系可为外围护结构保温工程及建筑模板工程未来研究方向提供一种新的思路和方法。 |
| 关键词: 岩棉复合保温外模板 抗弯性能 开槽处理 施工承载力 温度效应 |
| DOI：10.11918/202209006 |
| 分类号:TU745.5 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(52078168)；黑龙江省自然科学基金优秀青年基金(YQ2019E021) |
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| Bearing capacity and temperature effect of rock wool composite insulation external formwork |
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ZHAO Jianjun1,2,FU Jiaxin1,2,LI Shuang1,2
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(1.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China; 2.Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters (Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin 150090, China)
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| Abstract: |
| To improve the construction efficiency of building envelope and solve the long-term problems of falling off and ignition of traditional external insulation systems, a kind of rock wool composite insulation external formwork (RWCIEF) system integrating insulation and building formwork was proposed. The RWCIEF structure from inside to outside was designed as follows: inner reinforcing layer, rock wool insulation core material, adhesive layer, insulation transition layer, and outer reinforcing layer. Taking Harbin as an example, the optimal thickness of rock wool insulation core material was determined based on the life cycle cost (Clc). The feasibility of RWCIEF in engineering was explored by combining finite element analysis with theoretical calculation. The bending properties, construction bearing capacity, and stress and deformation under temperature effect of RWCIEF were calculated and analyzed. The influences of groove form, groove width, groove depth, and groove spacing on the bending properties of RWCIEF were discussed. Results showed that the theoretical calculation results of bending properties of RWCIEF were in good agreement with the finite element analysis results. The grooving treatment effectively improved the bending properties of RWCIEF. Considering the bending properties, thermal characteristics, and processing angle, groove forms of symmetrical cross grooves or symmetrical longitudinal grooves were suggested, with the groove depth and width of 10 mm and the groove spacing of 150 mm. The designed RWCIEF met the construction bearing capacity and could fully guarantee the construction quality of the thermal insulation works of the outer enclosure structure. The maximum tensile stress and compressive stress caused by temperature effect did not exceed the bearing capacity of the outer reinforcing layer of RWCIEF, which indicates that RWCIEF is unlikely to hollow in summer or crack in winter. The proposed RWCIEF system can provide a new idea and method for the future research directions of exterior envelope insulation and building formwork engineering. |
| Key words: rock wool composite insulation external formwork bending properties groove treatment construction bearing capacity temperature effect |
