Background,characteristics,core techniques,present progress and prospect of health monitoring of long span bridges are discussed. Health monitoring mainly aims at accumulated damage in structures.
讨论了工程结构 (特别是大跨桥 )健康监测系统的背景、特点、核心技术、所涉及的多学科研究进展及发展前景 ,指出其主要目的是监测累积损伤。
参考来源 - 桥梁结构的健康监测The main destruction of constructions suffering from earthquake is brought by the accumulated damage of structures under low cycle fatigue.
建筑结构在地震作用下的破坏主要是由结构的低周疲劳累积损伤引起的。
参考来源 - 混凝土高应变下累积损伤本构规律研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The accumulated damage model is viewed as the function of equivalent plastic strain, plastic volumetric strain and pressure.
积累损伤作为等效塑性应变、塑性体积应变和压力的函数。
Conclusions: Focused ultrasound has therapeutic effect on dermis but no accumulated damage to the skin treated at regular intervals.
结论：超声能够对皮下真皮层起到治疗作用，一定时间间隔的重复扫描不会引起皮肤的累积损伤。
The main destruction of constructions suffering from earthquake is brought by the accumulated damage of structures under low cycle fatigue.
建筑结构在地震作用下的破坏主要是由结构的低周疲劳累积损伤引起的。
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