نتایج جستجو برای: repeated loads

تعداد نتایج: 148796  

2014
Byung Jae Lee Jung Hwan Hyun Yun Yong Kim Kyung Joon Shin

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...

Journal: :Pediatric physical therapy : the official publication of the Section on Pediatrics of the American Physical Therapy Association 2013
Dorothy Ho Linda Fetters

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...

2009
Nathan J. Miller Richard M. Gutkowski Jeno Balogh Don Radford

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...

Journal: : 2023

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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