By L C Hollaway
During the last 3 a long time complex polymer composites have emerged as an enticing building fabric for brand new constructions and the strengthening/rehabilitation of current constructions and bridges. The concepts linked to the know-how, research and layout of polymer composites in building are consistently being researched and the development made with this fascinating fabric will proceed at an ever- expanding cost to fulfill the calls for of the development undefined. This quantity of court cases is from the second one ACIC 2004 foreign convention, which involved in the applying and additional exploitation of complicated composites in building. The convention allowed working towards engineers, asset managers, researchers and consultant of regulatory our bodies to advertise the lively trade of medical and technical details at the swiftly altering scene of complex composites in building. This quantity makes a speciality of the presentation of latest options, thoughts and case reviews, that allows you to result in larger exploitation of complex polymer composites and FRP fabrics for civil engineering infrastructure, rehabilitation and renewal.
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Extra info for Advanced Polymer Composites for Structural Applications in Construction: ACIC 2004
865 Min. 05 Durability of Advanced Polymer Composites in Civil Infrastructure Table 7: Performance Characteristics of Wet Layup FRP Composites by Location Property8-3 8-5 1 Layer Thick Specimens Avg. 029 Avg. 13 Avg. 0 1050 2 Layer Thick Specimens Avg. 854 Avg. 01 Avg. 845 Avg. 41 Avg. ---- Avg. SD 2 CV Max . Min - - 70 . 97 .. . 269 1154 9hl l - 6964 - - Results of the tests for the wet layup panels differentiated by the thickness are reported in Table 7 by location as Span-Bay. It can clearly be seen that there is not only significant scatter within values of a set but from set to set.
Although a reasonable case can be made to show the long-term durability of structures fabricated using aerospace grade composites and having well established maintenance and inspection procedures, the same cannot be established for systems being advanced for use in civil infrastructure, due to lack of data. There is hence a need to monitor existing structures in an attempt to not only gain a record of field performance, but to also realistically establish measures for long-term use potential. In addtion there is also a need for establishment of costeffective measures of structural health monitoring for conventional non-FRP systems as a means of being able to autonomously determine the structural and functional viability of life-lines on a continuous basis.
In this section the application of the methodology to a rehabilitated bridge structure is elucidated. 3 km east of Essex Road in the Mojave Desert. 9 m long. 5 m at each abutment. 13 m centers. The bridge component contains 18 spans and five bays in each span. A visual inspection of the bridge shows the development of transverse and longitudinal cracks on the soffit of the bridge deck and local punching shear potentially caused by increased traffic loads and steel reinforcement deficiencies. The bridge was rehabilitated through external bonding of FRP in the form of both wet layup of fabric and adhesive bonding of prefabricated (pultruded) strips.