摘要
储液结构混凝土的开裂是液体渗漏的主要原因。水池设计规范、规程以控制裂缝宽度来保证结构的耐久性和功能,水池的地震破坏等级划分标准也主要以构件开裂和液体渗漏程度为依据。该文进行了足尺钢筋混凝土水池壁板承受弯拉荷载作用试验,验证了混凝土裂缝具有较好的自愈性能,建议水池基本完好、轻微破坏等级的裂缝宽度限值可增加0.1mm,该值可供实际应用参考;弯曲裂缝的受压区能有效地阻止液体渗漏,建议储液结构不同种类裂缝限值规定应区别对待,弯曲裂缝需规定裂缝宽度和受压区高度;水池地震破坏等级划分应综合考虑渗漏程度,裂缝长度、宽度、分布密度及震后维修加固可行性等指标。
Cracks in liquid containing structures are the main reason for liquid leakage. Crack width is limited to ensure durability and function in water tank design codes and specifications. The earthquake damage classifications of tanks are based on the extent of cracking and liquid leakage. A full-scale experiment of reinforced concrete tank wall under high eccentricity tension has been done,good self-healing performance of concrete cracks are verified and crack width limits of basic intact,slight damage classification are proposed to increase 0. 1mm,which can be used as reference for practical applications. It is found that the compression zone developed in the section as a result of flexural stresses can effectively prevent leakage through the crack. The width limits of different types cracks should be treated differently,and the crack width and compressive zone height should be specified for flexural cracks. The earthquake damage classification of tanks needs to comprehensively consider factors such as leakage,crack length,width,distribution density and maintenance availability after an earthquake.
出处
《土木工程学报》
EI
CSCD
北大核心
2016年第3期98-104,共7页
China Civil Engineering Journal
基金
地震行业科研专项经费项目(201508023)
"十二五"国家科技支撑计划(2012BAK15B02-01)
关键词
水池壁板
弯曲裂缝
自愈性能
液体渗漏
tank walls
concrete flexural cracks
self-healing performance
liquid leakage
