service durability

Silica fum concrete also controls the alkaline aggregate reaction effectively and improves the durability that prolong the service life of the structure

硅灰混凝土还可以有效抑制碱骨料反应，提高结构物的安全度和耐久性，延长使用寿命

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This paper probes into the following points including design service life, durability design, structure safety degree, design status, and design expressions, etc. stipulated in the" Uniform Standard for Port Structures ′ Reliability Design ( GB 50158-92)" which is under modification.

针对正在修订的《港口工程结构可靠度设计统一标准》（GB50158-92）中设计使用年限、耐久性设计、结构安全等级、设计状况、设计表达式等进行探讨。

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Three plate type RC beams that had been in service in a bridge for 33 years and had various degrees of durability deterioration were tested. The evaluation results are in good agreement with the test results.

3根已经使用33年、耐久性损伤程度不同的钢筋混凝土桥面板梁的试验结果与估算结果吻合良好。

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To avoid early steel corrosion and expensive repair measures within the intended service life of reinforced concrete structures several concepts for durability design have been developed in recent years.

为了避免早期的钢筋锈蚀和高昂的维修费用，针对耐久性设计的许多观点在近几年内已经开始发展。

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The cracking phenomenon at different spot of the box girders under the construction and operation phrase will have directly effect on the safety, durability and service life of bridges.

但其在施工和运营过程中，箱梁的不同部位出现了不同程度的开裂现象，直接影响桥梁的安全性、耐久性及寿命。

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