CRACK AND MECHANICAL BEHAVIOR OF CFRP PLATE-REINFORCED BRIDGE ROOFS UNDER HIGH TEMPERATURE WITH DIFFERENT ANCHORING MEASURES

XIN YUAN; CHAOYU ZHU; JIANGBEI HU; YUYE ZHANG

doi:10.1590/1679-78255575

CRACK AND MECHANICAL BEHAVIOR OF CFRP PLATE-REINFORCED BRIDGE ROOFS UNDER HIGH TEMPERATURE WITH DIFFERENT ANCHORING MEASURES

Authors

XIN YUAN SCHOOL OF CIVIL ENGINEERING, SUZHOU UNIVERSITY OF SCIENCE AND TECHNOLOGY, SUZHOU 215011, CHINA HTTPS://ORCID.ORG/0000-0003-3721-1293
CHAOYU ZHU SCHOOL OF CIVIL ENGINEERING, SUZHOU UNIVERSITY OF SCIENCE AND TECHNOLOGY, SUZHOU 215011, CHINA HTTPS://ORCID.ORG/0000-0002-3504-253X
JIANGBEI HU SCHOOL OF CIVIL ENGINEERING, SOUTHEAST UNIVERSITY, NANJING 210096, CHINA HTTPS://ORCID.ORG/0000-0001-5217-7033
YUYE ZHANG DEPARTMENT OF CIVIL ENGINEERING, NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY, NANJING 210094, CHINA HTTPS://ORCID.ORG/0000-0003-1213-5079

DOI:

https://doi.org/10.1590/1679-78255575

Abstract

THIS PAPER INVESTIGATES THE CRACK AND MECHANICAL BEHAVIOR OF CFRP PLATE-REINFORCED BRIDGE ROOF UNDER HIGH TEMPERATURE WITH DIFFERENT ANCHORING MEASURES. SIX CFRP-REINFORCED TEST BEAMS WITH DIFFERENT ANCHORING SCHEMES WERE DESIGNED AND CONSTRUCTED. THE BEAM SPECIMENS, AFTER THE HIGH TEMPERATURE EFFECTS, WERE TESTED UNDER FOUR-POINT BENDING LOADS. THE CRACK PROPAGATION, BEAM DEFLECTION, MID-SPAN STRAIN AND THE DAMAGE MODES WERE OBSERVED AND RECORDED UNTIL FAILURE. THE STIFFNESS VARIATION AND THE DEBONDING FAILURE MECHANISM OF THE TEST BEAMS WERE COMPARATIVELY INVESTIGATED. THE RESULTS INDICATE THAT THE DEBONDING BEARING CAPACITY OF THE SPECIMENS CAN BE IMPROVED BY THE ADDITIONAL ANCHORING MEASURES. THE CONCRETE SHRINKAGE AT THE CRACK AND THE AVERAGE CRACK SPACING ARE MORE EFFECTIVELY REDUCED, WHEN THE ADDITIONAL ANCHORING MEASURES ARE PLACED AT THE MID-SPAN AND THE SUPPORT POSITION. IN ADDITION, A THEORETICAL MODEL IS PROPOSED FOR CALCULATING THE INTERMEDIATE CRACK DEBONDING BEARING CAPACITY. BASED ON THE COMPARATIVE ANALYSIS OF VARIOUS MODELS AND TEST RESULTS, IT IS SHOWN THAT THE PROPOSED MODEL COULD ACCURATELY CALCULATE THE INTERMEDIATE CRACK DEBONDING BEARING CAPACITY OF THE TEST SPECIMENS.

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Published

2019-06-17

Issue

Vol. 16 No. 6 (2019)

Section

Articles

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