气候变化下蓄热层构筑墙体保温改造热性能研究

Thermal Performance of Thermal Insulation Reconstruction of Thermal Storage Wall under Climate Change

当前建筑墙体保温技术承载力较差,易出现墙体保温失效情况。为有效提高气候变化下的蓄热层构筑墙体保温性能,提出基于水平低周反复荷载测试的气候变化下蓄热层构筑墙体保温改造热性能分析模型。构建气候变化下蓄热层构筑墙体保温承载力学模型,建立影响墙体失效破坏模式的蓄热层构筑墙体保温参数融合分析模型。以此为基础采用水平低周反复荷载测试方法,分析蓄热层构筑墙体保温演化曲线,在强度等级下分析水平往复荷载,运用低周往复荷载试验方法实现蓄热层构筑墙体保温改造热性能量化分析。实验测试结果表明,根据改造前后钢板和混凝土两组试件的保温性能的有限元分析结果可知,利用所提方法改造后,保温性能大约提高了50%,验证了提出方法在蓄热层构筑墙体保温改造中具有很好的应用价值。

At present,the thermal insulation technology of building walls has poor bearing capacity,which is prone to the wall insulation failure.In order to effectively improve the thermal insulation performance of the heat storage layer under climate change,the thermal performance analysis model of the heat storage layer under climate change based on horizontal low cyclic load test was proposed.The loadbearing mechanical model of wall insulation constructed by thermal accumulator layer under climate change is constructed,and the fusion analysis model of thermal insulation parameters of thermal accumulator layer constructed wall insulation affecting the failure mode of wall is established.On this basis,the thermal insulation evolution curve of the wall constructed by the thermal accumulator layer is analyzed by the method of horizontal low cyclic repeated load test,the horizontal reciprocating load is analyzed under the level of intensity,and the thermal performance of the thermal insulation reconstruction of the wall constructed by the thermal accumulator layer is quantitatively analyzed by the method of low cyclic reciprocating load test.The experimental test results show that,according to the results of finite element analysis of the thermal insulation performance of the steel plate and concrete specimens before and after the retrofitting,the thermal insulation performance is improved by about 50%after the modification of the proposed method,which verifies that the proposed method has a good application value in the reconstruction of the thermal insulation of the wall with the heat storage layer.