无伸缩缝大面积地下室结构设计及温度应力分析  

Structural Design and Temperature Stress Analysis of Large-area Basement Without Expansion Joint

作　　者：谢亮[1] 史君 Xie Liang;Shi Jun(Xizang Vocational Technical College,Lhasa,Xizang 850000;Hangzhou Construction Engineering Management Group Co.Ltd.,Hangzhou,Zhejiang 310008)

机构地区：[1]西藏职业技术学院,西藏拉萨850000 [2]杭州市建设工程管理集团有限公司,浙江杭州310008

出　　处：《江西建材》2024年第12期402-404,共3页

摘　　要：为分析大面积地下室结构温度应力,文中以某保障性住房工程为例,通过MIDAS FEA和LUSAS有限元软件,模拟分析无伸缩缝大面积地下室顶板的温度应力,并提出抗裂提升设计方案。结果表明,仅冬季最低温度时,地下室顶板拉应力最大值超出混凝土强度设计要求值;采用补偿收缩混凝土的大面积无伸缩缝结构抗裂设计方案;配筋率越大,限制膨胀率不断降低;箍筋配筋率越大,补偿收缩混凝土自应力越高;最终确定配筋率为1.08%,箍筋配筋率为0.5%,为大体积地下室结构实现无伸缩缝建设提供理论支撑。In order to analyze the temperature stress of large-area basement structure,this paper takes an affordable housing project as an example,and uses MIDAS FEA and LUSAS finite element software to simulate and analyze the temperature stress of large-area basement roof without expansion joint,and puts forward the anti-crack lifting design scheme.The results show that the maximum tensile stress of basement roof exceeds the design requirement of concrete strength only at the lowest temperature in winter.The anti-crack design scheme of large-area structure without expansion joint is adopted to compensate shrinkage concrete.The expansion rate does not decrease with the increase of reinforcement ratio.The higher the proportion of stirrup reinforcement,the higher the self-stress of the concrete.Finally,the reinforcement ratio was determined to be 1.08%,and the reinforcement ratio of stirrup was 0.5%.It provides theoretical support for the construction of large volume basement structure without expansion joint.

关 键 词：地下室结构 无伸缩缝 大面积 设计方案 温度应力 

分 类 号：TU74[建筑科学—建筑技术科学]