Life-cycle cost analysis is an approach that has gained popularity for assisting the design of civil infrastructures. The life-cycle cost analysis approach can be leveraged for structures equipped with structural health monitoring systems in order to quantify the benefits of the technology and de facto support its long-term implementation. However, for new structures, the long-term assessment of the expected value of the total investment cost, in terms of the current worth at the design time, is still the focus of ongoing research due to unknowns and uncertainties on the impact of the structural health monitoring system on long-term structural performance. This article proposes a new combined model of life-cycle cost formulation and simulation methodology for the long-term financial assessment of transportation bridges equipped with seismic structural health monitoring systems, in order to evaluate the total costs and benefits offered by such monitoring systems for post-seismic assessments. The formulation characterizes the time evolution of bridge management cost terms, highlighting the most sensitive parameters. The simulation methodology allows to quantitatively weigh each maintenance action on the total cost based on when the action is performed. The model is used to compare structures managed by the traditional approach of post-earthquake inspection versus those managed by a condition-based approach enabled by structural health monitoring systems. The originality of the model empowers the comparison by payback time, defined as the break-even point between costs and benefits of a structural health monitoring system, as well as by economic gain, defined as the difference between the total costs of an unmonitored versus a monitored structure through the end of service life. The proposed model is demonstrated through parametric analyses on a case study consisting of a continuous steel-concrete composite bridge, where the structural health monitoring system is used to monitor the elastic limit state condition of bending forces in piers during the earthquake.

生命周期成本分析是一种辅助民用基础设施设计的方法。生命周期成本分析方法可用于配备结构健康监测系统的结构，以便量化该技术的收益并事实上支持其长期实施。但是，对于新结构，由于对结构影响的未知和不确定性，就设计时的当前价值而言，长期评估总投资成本的预期价值仍然是进行中研究的重点。健康监测系统对长期结构性能的影响。本文提出了一种新的生命周期成本估算和模拟方法的组合模型，用于对配备有地震结构健康监测系统的运输桥梁进行长期财务评估，以便评估此类监测系统为后期监测提供的总成本和收益地震评估。该公式描述了桥梁管理成本术语随时间的变化，突出了最敏感的参数。仿真方法可以根据执行维护操作的时间在总成本上定量权衡每个维护操作。该模型用于比较由传统的震后检查方法管理的结构与由结构健康监视系统支持的基于条件的方法管理的结构。该模型的独创性使得能够通过投资回收期（定义为结构健康监控系统的成本和收益之间的收支平衡点）以及通过经济收益（进行比较）来进行比较，该收益是指不受监控的成本与运营成本之间的差额。在使用寿命结束之前对结构进行监控。通过参数分析在一个由钢-混凝土连续组合桥组成的案例研究中证明了该模型，该结构健康监测系统用于监测地震过程中桥墩弯曲力的弹性极限状态。定义为到使用寿命结束时不受监视的结构与受监视的结构的总成本之间的差额。通过参数分析在一个由钢-混凝土连续组合桥组成的案例研究中证明了该模型，该结构健康监测系统用于监测地震过程中桥墩弯曲力的弹性极限状态。定义为到使用寿命结束时不受监视的结构与受监视的结构的总成本之间的差额。通过参数分析在一个由钢-混凝土连续组合桥组成的案例研究中证明了该模型，该结构健康监测系统用于监测地震过程中桥墩弯曲力的弹性极限状态。