Flexural Capacity Calculation Approach for Precast Grouted Shear Wall Influenced by Joint Interface Displacements

Abstract

The grouted precast buildings have great economic superiorities and application potentials. With excessively utilized confinement steels, connecting steels, and steel sleeves, their mechanical properties satisfied the strength requirements. But the capacity calculation approach still remains uncertain due to the complexity caused by the joint interface slip and joint gap opening displacement, which can hardly be avoided and lead to an excessive steel configuration. In order to make the design approach of precast grouted shear wall convenient and to achieve economic superiorities and properties advances, this paper proposed a new flexural capacity calculation approach considering joint interface displacements influences and properties improvement by confinement steels. The calculated capacities of example precast shear wall are 553.8 kN, 501.0 kN, and 536.4 kN when only considering confinement improvement, interface slip reduction, and both the improvement and reduction, respectively. By comparing the calculated results with the experimental tested results of 589.4 kN, the accuracy and reasonability of this new calculation approach were verified. Afterward, some requirements on application conditions of this new calculation approach were suggested depending on different precast structure type and seismic area.

Mechanical Analysis of Grouted Sleeve Lapping Connector

“…The resultant bond stress acting on the inserted bar by the grout from section A to B is denoted as F AB b , and the resultant bond stress acting on the inserted bar by the grout from section B to C is denoted as F BC b . Neglecting the effect of the gap opening displacement [43], it follows that:…”

Experimental study on seismic performance of new reinforced tenon joint precast shear walls

“…Early study also proved (Ling et al, 2009) that both the joint gap opening and interface slip have obvious effects on the lateral shear stress of connection steel bars. However, as shown in Figures 1 and 2 (Wu et al, 2015), the influence degrees of the joint gap opening and slip are various. According to the results and conclusions from early study, connecting steel bar as the shear resistance components is unreliable and harmful, but still widely existed in ordinary flat seam components.…”

“…Many studies (Ling et al, 2012;Soltani et al, 2003Soltani et al, , 2005Wu et al, 2015) focused on the ordinary flat seam components, indicating that when the joints cracked or slipped, the vertical connecting steel bars will bent under shear force. Although the dowel-action shear stress in steel bars provides a part of the shear capacity of joints, but it is at the cost of decreasing the yielding strength.…”

Experimental study on mechanical behavior of thermally damaged grouted sleeve splice under cyclic loading

“…Industrialization and standardization must be the irreversible development trend of civil engineering. Therefore, precast concrete structures, especially in China these days; have received special attention 3 . It is generally believed that precast concrete structures have the advantages of lower labor intensity, less cost, and higher quality of the components during the construction, 4–7 which could contribute to sustainability of the concrete industry 8 …”