Residual Strength of L-shaped Steel Reinforced Concrete Columns after Exposure to High Temperatures

Experimental Study on Basic Mechanical Properties of PVA Fiber-Reinforced Coral Cement-Based Composites

“…Due to the particularity of coral cement-based composites, the large amount of salt, and the relatively limited application scope, existing studies on fiber-reinforced coral cement-based composites are mainly aimed at those with strength grades below C50 and are still in the initial exploration stage [ 24 , 25 ]. To meet the requirements on coral cement-based composites for blast resistance and impact resistance in offshore reef protection projects and change the current situation that coral cement-based composites can only meet the needs of civil use and some special cases, in this study, based on the low-cost preparation technology of medium- and high-strength coral cement-based composites in the early stage [ 26 ], PVA fibers with high toughness, high crack resistance, high deformation, and corrosion resistance, which are used in common cement-based composites, are adopted to reduce the brittleness and improve the toughness of high-strength coral cement-based composites [ 27 ]. The basic mechanical properties of PVA fiber-reinforced coral cement-based composites with high strength were tested, and the effects of the PVA fiber content and length-to-diameter ratio (L/D) on the mechanical properties of the coral cement-based composites were analyzed to reveal the strengthening mechanism of its PVA fibers.…”

Post-Fire Behavior of Cross-Shaped Steel Reinforced Concrete Columns: Simulation and Analytical Expressions

“…Unfortunately, high-rise building fires are not uncommon, posing a serious threat to people's safety. After exposed to fire, the strength and rigidity of the steel-concrete composite members are lost, so it is essential to reevaluate the residual bearing capacity to take appropriate reinforcement measures to ensure that the structure can withstand the corresponding load [1][2][3][4] and continue to put into use. However, the core issue of repair assessment is how to determine the residual bearing capacity of the structure after fire, which has not been resolved yet.…”