نتایج جستجو برای: repeated loads
تعداد نتایج: 148796 فیلتر نتایج به سال:
The development of cracking in concrete structures leads to significant permeability and to durability problems as a result. Approaches to controlling crack development and crack width in concrete structures have been widely debated. Recently, it was recognized that a high-performance fiber-reinforced cement composite (HPFRCC) provides a possible solution to this inherent problem of cracking by...
PURPOSE This study investigated the effects of carrying weighted backpacks of up to 20% of body weight on the posture and pain complaints of elementary-school children. METHODS Craniovertebral, forward trunk lean and pelvic tilt angles were measured from sagittal photographs of 62 children (8-11 years old) before and after walking while carrying backpacks containing 10%, 15%, or 20% of body w...
This research study focused on the long-term and repeated load behavior of wood-concrete composite beams in which the wood layer is composed of recycled utility poles. Previous research studies have found this type of a beam to have high efficiency and to be a potentially viable replacement for short span bridges on low traffic roadways. Since both wood and concrete exhibit time-dependent behav...
The Response of Reinforced Concrete Composite Beams Reinforced with Pultruded GFRP to Repeated Loads
This paper investigates the experimental response of composite reinforced concrete with GFRP and steel I-sections under limited cycles repeated load. The practical work included testing four beams. A reference beam, two beams pultruded I-sections, a beam I-beam were subjected to loading. loading test started by gradually up maximum 75% ultimate static failure load for five unloading cycles. Aft...
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