基于温度、收缩效应的超长砌体结构性能分析

Temperature and Shrinkage Effect Based Behavior Analyses of Super Long Masonry Structure

温度和收缩是砌体结构产生非受力裂缝的主要原因.结合砌体结构裂缝的成因,根据工程实例,用有限元分析软件ANSYS,对一超长砌体结构在温度效应和收缩效应下的性能进行了分析,发现温度效应和收缩效应对结构性能影响显著.为减轻这两种效应造成的有害影响,提出设置后浇膨胀带的构造措施,并对设置后浇带的结构进行了模拟和对比分析.结果表明,良好的屋面保温层和后浇膨胀带能够控制超长砌体结构在温度效应和混凝土收缩效应下产生的有害裂缝.分析结果可供同类结构分析和设计参考.

Temperature and shrinkage are the main factors leading to non-bearing cracks in concrete.Based the formation mechanism of the cracks in masonry structures,a practical engineering case is analyzed with the finite element analysis software ANSYS,which indicates temperature and shrinkage have a great effect on the structure behaviors.In order to alleviate the damage the late poured band as constructional measure is proposed,and the structure with it is simulated and compared to that without the late poured band.The results show that the proper roof insulation and late poured band can keep the harmful cracks caused by temperature and shrinkage in control.Furthermore,it will provide some reference in design and analyses for structures in this type.