摘要
主要对钢板-混凝土组合剪力墙裂缝产生机理及控制措施进行了初步探索。结合实际工程中钢板-混凝土组合剪力墙的结构形式和普遍存在的开裂现象进行试验研究。通过预热钢板-混凝土组合剪力墙结构中的钢板,在混凝土终凝前使其产生预膨胀,混凝土强度发展过程中钢板逐步收缩,以控制混凝土在凝结硬化过程中收缩受到钢板约束而产生的有害裂缝。试验证明,该措施能有效降低剪力墙钢板与混凝土应变差,对控制剪力墙裂缝具有显著的成效。
This paper shall mainly discuss the mechanism of cracking in steel plate-concrete composite shear wall and its control measures.In combination with the widespread cracking phenomenon in the steel plate-concrete composite shear wall of practical projects,experiments have been conducted.By preheating the steel plates of the shear wall structures to produce pre-expansion in the steel plates before the final setting of the concrete,with the development of concrete strength and the contracting of concrete,the steel plates shall shrink gradually,so as to prevent the harmful cracks in the concrete due to the constrain of steel plates,which usually occurs in the setting and hardening process when the concrete contracts.The experiments prove that the measures can effectively reduce the strain differences between steel plates and concrete of the shear walls and thus significantly control shear wall＇s cracks.
出处
《施工技术》
CAS
北大核心
2013年第1期27-31,共5页
Construction Technology
基金
中建总公司课题(CSCEC-2010-Z-01)
关键词
高层建筑
核心筒
钢板-混凝土组合剪力墙
裂缝
应变
温度
tall buildings
core tube
steel plate-concrete composite shear wall
cracks
strain
temperature
