{"id":10119,"date":"2022-02-14T16:56:48","date_gmt":"2022-02-14T16:56:48","guid":{"rendered":"http:\/\/141.23.68.248\/wp\/?page_id=10119"},"modified":"2022-02-15T17:45:35","modified_gmt":"2022-02-15T17:45:35","slug":"maintenance-strategies","status":"publish","type":"page","link":"http:\/\/141.23.68.248\/wp\/?page_id=10119","title":{"rendered":"3.Maintenance Strategies"},"content":{"rendered":"

Civil engineering systems such as a Buildings, sump pits, playgrounds and fibers are designed for a very long lifetime. These products serve as supporting infrastructure for private and business transactions of our society. Various factors such as daily usage, weather conditions and severe events (such as earthquakes, floods or landslides) and their combination contribute to systems deterioration and sometimes to their failure.<\/p>\n

Maintenance actions typically classified as preventative and substantial. Preventative maintenance actions taken to prevent deterioration and keep the structure fully operational while substantial maintenance actions are taken to repair an existing damage and improve the condition. Substantial maintenance work is usually comprehensive while preventative maintenance work is relatively small scale.<\/p>\n

Preventative maintenance activities on sump pits,\u00a0concrete slab or column, playground and fiber cables are typically focused to reduce the impact of water and usage capacity from the people and children. The main goals are as follows:<\/p>\n

    \n
  1. Ensuring proper drainage of water in the structure from to the sump pits.<\/li>\n
  2. Sealing with proper materials of structural concrete slab or columns elements from exposure to water<\/li>\n
  3. Improving the surface conditions in playground area to prevent accelerated deterioration<\/li>\n
  4. Providing proper\u00a0matetrial for fiber optic cables
    \n<\/b><\/li>\n<\/ol>\n

    Substantial\u00a0maintenance activities on sump pits, concrete slab, playground and fiber optic, on the other hand, are as follows:<\/p>\n

      \n
    1. Repair<\/li>\n
    2. Replacements<\/li>\n<\/ol>\n

       <\/p>\n

      INDIVIDUAL\u00a0MAINTENANCE PLANS OF SUBSYSTEMS<\/strong><\/p>\n

      An efficient\u00a0intervention\u00a0plan\u00a0for each component is required to\u00a0obtain an efficient integrated system plan. Individual plans are shown below:<\/p>\n

       <\/p>\n

      \"1\"<\/a>\"2\"<\/a>\"3\"<\/a><\/p>\n

      Fig 1.\u00a0Individual timelines of Subsystems<\/p>\n

      \u00a0<\/a><\/p>\n

       <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Type of Intervention<\/td>\nAbbreviation<\/td>\nDuration(days)<\/td>\nIdeal Frequency(years)<\/td>\n<\/tr>\n
      Precast sump pit Maintenance<\/td>\nPS-M<\/td>\n30<\/td>\n10<\/td>\n<\/tr>\n
      Precast\u00a0 sump pit Replacement<\/td>\nPS-R<\/td>\n60<\/td>\n30<\/td>\n<\/tr>\n
      Steel\u00a0 Minor Repair (Surface)<\/td>\nS-M<\/td>\n10<\/td>\n20<\/td>\n<\/tr>\n
      Steel Structural Repair<\/td>\nP-R<\/td>\n40<\/td>\n50<\/td>\n<\/tr>\n
      Cable Addition -> Inserting another wire into the tube<\/td>\nC-A<\/td>\n4<\/td>\n20<\/td>\n<\/tr>\n
      Cable Replacement<\/td>\nC-R<\/td>\n10<\/td>\n20<\/td>\n<\/tr>\n
      Maintenance of\u00a0Steel Concrete Slabs<\/td>\nSC-M<\/td>\n15<\/td>\n20<\/td>\n<\/tr>\n
      External Inspection of\u00a0Steel Concrete Slabs<\/td>\nSC-I<\/td>\n10<\/td>\n10<\/td>\n<\/tr>\n
      Asphalt Surface for walkway around playground area Replacement<\/td>\nAS-R<\/td>\n8<\/td>\n25<\/td>\n<\/tr>\n
      Playground\u00a0 Intermediate and Base Layer Replacement<\/td>\nPIB-R<\/td>\n18<\/td>\n60<\/td>\n<\/tr>\n
      Playground Surface Maintenance<\/td>\nPS-M<\/td>\n4<\/td>\n10<\/td>\n<\/tr>\n
      Playground Intermediate and Base Layer Mainenance<\/td>\nAIB-M<\/td>\n4<\/td>\n20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

       <\/p>\n

      INTEGRATED STRATEGY<\/strong><\/p>\n

      Maintenance of a civil system rely on information collected on its components, which can provide the us an accurate assessment of the overall condition state.<\/p>\n

      Our\u00a0aim is to minimize the duration of the interventions and to maximize the\u00a0gap\u00a0between\u00a0them. We can attain this goal by aligning the maintenance strategies of the subsystems. After integrating the maintenance plans of all subsystems, the following timeline and pareto plots are obtained:<\/p>\n

      \"1920-1001-max\"<\/a><\/p>\n

      Fig 2.\u00a0Integrated Timeline<\/p>\n

      \n
      \n
      <\/div>\n
      <\/div>\n
      <\/div>\n
      \n
      \n
      \n
      \n

      The optimal option would be obtained by\u00a0is minimizing the duration of the interruptions and maximizing the distance between interventions. We can rank the alternatives to evaluate\u00a0and select the best alternative which is the best for our preference. 320 alternatives are ranked in the plot below based on\u00a0our preference.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

       <\/p>\n

       <\/p>\n

      \"ranking1\"<\/a><\/p>\n

      Fig 3. Ranking of\u00a0Alternatives<\/p>\n

       <\/p>\n

       <\/p>\n

      Our preference is visualized by the Pareto frontier in the first graph\u00a0below. The blue line represents the Pareto frontier\u00a0and the dark black point in the top-left corner represents the best alternative based on the preferences. In the second graph, the opposite case is represented, which is low distance and high duration.<\/p>\n

       <\/p>\n

      \"paretobestworst\"<\/a><\/p>\n

       <\/p>\n

      Fig 4.\u00a0 Lowest\u00a0Duration – Highest Distance and Highest Duration – Lowest Distance\u00a0Alternatives<\/p>\n

       <\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      Civil engineering systems such as a Buildings, sump pits, playgrounds and fibers are designed for a very long lifetime. These products serve as supporting infrastructure for private and business transactions of our society. Various factorsContinue reading<\/a><\/p>\n","protected":false},"author":119,"featured_media":0,"parent":8853,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-10119","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/pages\/10119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/users\/119"}],"replies":[{"embeddable":true,"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10119"}],"version-history":[{"count":12,"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/pages\/10119\/revisions"}],"predecessor-version":[{"id":10740,"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/pages\/10119\/revisions\/10740"}],"up":[{"embeddable":true,"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=\/wp\/v2\/pages\/8853"}],"wp:attachment":[{"href":"http:\/\/141.23.68.248\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}