混凝土结构全寿命等耐久性设计的理论框架

为延长混凝土结构的寿命，实现混凝土结构可持续发展，节约成本和资源，提高结构在寿命周期内的经济效益，基于等耐久性设计和全寿命设计理念，提出了全寿命等耐久性设计方法，指出了其核心研究内容，并对设计方法的基本思路、理论框架、设计过程进行了研究。结果表明:全寿命等耐久性设计方法具有均衡结构耐久能力、延长使用寿命、减小全寿命成本的优点，可在结构设计的初步设计阶段发挥作用；将全寿命等耐久性设计方法应用于成本投入高、使用周期长的混凝土结构（如桥梁结构），有望带来可观的经济效益。

Theoretical Framework of Life Cycle Equal Durability Design Method in Concrete Structure

In order to extend service life of concrete structures, realize the sustainable development of concrete structures, save cost and resource, and improve economic benefit during the life cycle, life cycle equal durability design method (LC-EDDM)was proposed based on equal durability design method and life cycle design method, and the core research contents were presented. The basic principle, framework, design process of LC-EDDM were studied. The results show that LC-EDDM is helpful to balance the durability ability, extend the service life and save life cycle cost. The method plays an efficient role in the preliminary design stage in the structural design. Economic benefits can be got if LC-EDDM is applied to concrete structures with high costs and long service lives, such as bridges.