钢桥面铺装结构组合的全寿命经济分析

Life-cycle Cost Analysis(LCCA) on Combinational Deck Pavement Structure ofSteel Bridge

以双层SMA结构、浇注式沥青混合料(GA)+改性沥青马蹄脂混合料(SMA)、环氧沥青混合料(EA)+改性沥青马蹄脂混合料(SMA)等三种铺装结构组合方案为研究对象,采用净现值分析方法,通过确立铺装结构周期成本构成、寿命周期及标准折现率,得到三种铺装结构全寿命周期成本净现值。机构成本和用户费用的对比分析表明:双层SMA铺装结构方案性价比最好,而EA+SMA铺装结构方案的全寿命周期费用最高。本研究可为钢桥面铺装结构类型的优选提供参考依据。

This paper takes three steel deck pavement structure combinations as research object,which are double SMA structure,GA +SMA,EA+SMA.Obtaining the life cycle cost net present value(NPV) by determining cost components,life cycle and rate of discount with analysis method of NPV,the comparison between agency cost and user cost shows that the cost performance of double SMA pavement structure is the best,the life-cycle cost of EA+SMA pavement structure is the highest.This study can provide the reference for the selection of steel bridge deck pavement structure types.