洞口对装配式夹心保温外墙板受力性能和位移的影响

Influence of opening on mechanical properties and displacement of fabricated sandwich insulation wallboard

以实际工程中常用的4类典型装配式夹心保温外墙板为研究对象,通过有限元分析门窗洞口和管线开槽对装配式保温外墙板的受力性能和位移影响。分析结果表明:外墙开洞不会对最不利工况的类别产生影响,4类墙板的最不利工况均为脱模工况;开洞会对连接件与混凝土应力的最大值、最大应力分布位置及外墙板的位移产生显著影响,具体为:脱模工况下开洞墙板的连接件最大应力平均值比不开洞墙板低约31%,正常使用工况下开洞墙板连接件最大应力平均值比不开洞墙板高约37%,开洞墙板连接件的最大应力位置由边缘连接件端部转移为洞口附近连接件端部,开洞使外墙混凝土应力的最不利位置由边缘连接件端部位置向洞口附近集中;长期荷载作用下不开洞墙板位移大于开洞墙板,开洞后外墙板位移约减少10%。

In this paper,four types of typical fabricated sandwich insulation exterior wall panels commonly used in practical engineering are taken as the research object.The effects of door and window openings and pipeline slotting on the mechanical performance and displacement of fabricated insulation exterior wall panels are analyzed by finite element method.The analysis results show that the opening will not affect the category of the most unfavorable working conditions,and demoulding working conditions is the most unfavorable working conditions of the four types wall.The opening will have a significant impact on the stress of the connector,the size and maximum distribution position of the concrete stress and the displacement of the outer wall panel.Specifically,under the demoulding condition,the stress of the connector of the perforated wall panel is 34%lower than that of the wall panel without opening.Under normal service conditions,the maximum stress of the connector for the perforated wall panel is about 37%higher than that of the wall without opening.The maximum stress position of the opening wall panel connector is transferred from the end of the edge connector to the end near the opening.The opening makes the maximum stress position of the concrete from the end of the edge connector to the vicinity of the opening.Under the action of long-term load,the displacement of the wall without opening is greater than the wall with opening,and the displacement of the outer wall after opening is reduced by about 10%.