装配式大板建筑中,板缝和节点连接是保证结构抗震整体性的关键,但它断面小、分散、结构表面系数达20以上,远远超过冬施采用蓄热法适宜的表面系数值的范围。过去冬施时,往往把适当提高混凝土标号或掺外加剂定为冬施措施。近年来,随着大板体系建设的日益发展,采取有效措施来保证 In prefabricated large-scale buildings, board seams and joint connections are the key to ensure the structural integrity of the seismic structure, but its cross section is small, scattered, and the surface coefficient of the structure is more than 20, far exceeding the suitable surface coefficient value of the thermal storage method applied in winter. range. In the past winter season, it was often appropriate to increase concrete markings or admixtures as winterization measures. In recent years, with the development of the large-scale system construction, effective measures have been adopted to ensure