摘要
大多数的钢筋混凝土结构服役期已经很长,加之受到自然界无情的物理、化学及生物的作用,材料与结构均出现不同程度的老化和病害,如混凝土碳化、保护层厚度变化、钢筋锈蚀、混凝土强度变化等。这些损伤的出现,不仅造成结构耐久性的变化,而且对极限承载能力产生影响。文中结合混凝土结构安全检测的若干问题,分析了混凝土碳化、保护层厚度变化、钢筋锈蚀、混凝土强度变化对极限承载力的影响,并以某水闸中的一钢筋混凝土简支梁为例,在考虑以上4种损伤同时存在的情况下,运用有限元软件ANSYS计算其在完好与当前受损两种状态下的抗弯极限承载力,研究成果可为受损混凝土结构的后期管理以及加固维修提供可靠的理论依据。
Most of concrete structure had undergone long time. They suffered physical, chemical and biological action from natural environments. Both material and function appeared different degrees of aging and diseases. For example concrete carbonation, the change of cover thickness, rebar corrosion, the change of concrete strength and so on. Resulted in changes of durability and ultimate bearing capacity. This article combines several questions of the concrete structure test at present. We analyse the influences for the ultimate beating capacity of concrete carbonation, the change of cover thickness, rebar corrosion, the change of concrete strength. At last taking the Simply-supported Beam of sluice for example. Considering the four species damnification at the same time. Calculating the ultimate beating capacity at good condition and damaged condition. It makes us understand the working behavior and decided the strategy of repairing and maintenance scientifically.
出处
《水科学与工程技术》
2009年第2期5-8,共4页
Water Sciences and Engineering Technology
关键词
受损
钢筋混凝土构件
极限承载能力
有限元
damaged
reinforced concrete member
ultimate bearing capacity
finite element
