مشروع البحث: PERFORMANCE OF CONCRETE MEMBERS STRENGTHENED WITH CFRP SHEETS SUBJECTED TO VARIOUS HAZARD ENVIRONMENTS
تحميل...
المساهمين
الممولين
رقم التعريف
369
الباحث
IBRAHIM FATHALLAH BUMADIAN
الوصف
with CFRP sheets. Thermal loadings ranging from 20oC (68oF) to 170oC (338oF) are associated
with various mechanical loading configurations for 18 beams: monotonic, incremental cyclic, and
anomalous cyclic. Of interest are the flexural responses, failure modes, and energy development
of the strengthened beams subjected to the coupled loadings. The capacity of the beams decreases
with an increase in temperature, whereas their individual performance is controlled by the
mechanical loading schemes. A threshold temperature is noticed, which classifies the response
domains of the cyclically loaded beams. The implications of the monotonic and cyclic loadings
become similar above the threshold temperature due to the deteriorated CFRP-concrete interface.
The failure modes of the beams are dominated by the thermal loading, rather than the mechanical
loadings. Regarding the energy development of the test beams, the influence of the incremental
cyclic loading is pronounced relative to its anomalous counterpart. The degree of energy
dissipation tends to stabilize as long as the anomalous excitation does not exceed the magnitude
of the sinusoidal cyclic loading. To characterize the performance of the strengthened beams under
the thermomechanical-coupled loadings, an analytical approach is proposed. The third phase deals
with the feasibility of a novel anchor system that mitigates the end-peeling of CFRP sheets used
الكلمات الدالة
strengthened beams with variable embedment angles and the degree of local debonding.