硫酸盐还原菌对高桩码头抗震设计的影响

国际上高震区高桩梁板码头抗震设计往往采用基于位移的抗震设计方法,且采用钢管桩结构较多,而硫酸盐还原菌(SRB)能在极短时间内对钢管桩造成严重的腐蚀,危害极大。针对SRB的腐蚀机理,提出3种主要防护措施,并对物理防护法的3种不同工程应用方案进行对比研究。结合菲律宾马尼拉某集装箱码头工程设计,采用控制变量法,对3个方案分别进行push-over推覆分析求解。计算结果表明,覆盖层保护法及钢管桩泥面处局部填充混凝土法的结构抗力较大且结构延性较好。对类似工程环境的码头结构设计具有借鉴意义。

Impact of sulfate reducing bacteria on seismic design of suspended jetty structure

The displacement based seismic design method is often used in the seismic design of suspended jetty structure in the highly seismic zone.The sulfate-reducing bacteria (SRB) can cause serious corrosion to steel pipe piles in a very short period of time.Three main anti-corrosion measures are proposed for the corrosion mechanism of SRB,and three different engineering application options of physical anti-corrosion method are compared and studied.Based on the design of a container terminal project in Manila,Philippines,we carry out the push-over analysis for the three options respectively by using the control variable method.Results show that the coating protection option and the partial concrete infill option have a better structural ductility and larger structural resistance,and may serve as reference for the structural design under similar engineering environment.