Experimental study of lateral load behavior of H‐shaped precast reinforced concrete shear walls with bolted steel connections

Abstract

Summary This paper presents an experimental study of H‐shaped precast reinforced concrete shear walls involving vertical connections under combined vertical and lateral loading. The H‐wall is composed of two prefabricated flange wall panels: one prefabricated web wall panel and vertical bolted steel connections between the flange and web panels. The assembling of the H‐wall is completely dry without any in situ casting. Three H‐wall specimens were constructed and tested to investigate the mechanical behavior and seismic performance of them. The lateral load‐bearing capacity, ductility, energy dissipation, lateral stiffness, strain in the connecting steel frame, and sliding within the bolted steel connections are presented and discussed to evaluate the effectiveness of the vertical connections. The ultimate shear‐resistance mechanism of the precast H‐wall assembly is also analyzed. The H‐wall assemblies generally possess high load‐bearing capacity, favorable ductility, and good energy‐dissipating capacity. The thickness of the steel plates in the connecting steel frame affects the lateral stiffness and the ultimate load‐bearing capacity of the H‐walls. Furthermore, the encasing steel plates for the web wall panel not only helps transfer the stress in the wall steel bars but also confines the concrete resulting in improved ductility.

An Experimental Study on Mechanical Properties of Concrete-Filled Steel Tube (Cfst) Key-Connected Prefabricated Wall and Column

“…For example, different types of shear walls have been studied, including linear type, I-shaped, L-typed, and T-shaped. Several studies focused on the influence on the seismic behavior of these shear walls exerted by the following factors: the length of the splicing zone, the length of the ribs, the material of the splicing zone, and the form of the splicing zone(Sun et al [11], Song et al [12], LU et al [13], JGJ101-96 [14], Smith et al [15], Pekau et al [16], Soudki et al [17], LI et al [18], Soudki et al [19]). Nevertheless, there are few studies on the prefabricated frame-shear structure.…”

Experimental study on fabricated shear wall structure with energy‐dissipating vertical joint

“…They showed that the partially prefabricated reinforced concrete shear wall performs well. Sun Jian et al 9,10 conducted a low cyclic loading test on the prefabricated reinforced concrete shear wall by using connection steel frames and high‐strength bolts. Their results showed that this fabricated shear wall is of high bearing capacity and good ductility and energy dissipation.…”

Pseudodynamic tests with substructuring of a full‐scale precast box‐modularized structure made of reinforced concrete shear walls

“…Since then, a significant amount of research has been conducted worldwide on the design and seismic behavior of precast concrete frame structures and precast concrete shear wall structures. The research on precast concrete shear wall structures was mostly focused on the connections of different types, that is, emulative, posttensioned, hybrid, and in posttensioned walls endowed with energy dissipation …”

“…Henin and Morcous investigated the use of nonproprietary bar splice sleeves for precast concrete construction, and the test results indicated that the proposed bar splice sleeves exhibit adequate capacity to fully develop reinforcing bars while being simpler to use and more economical than current proprietary splice sleeves. An assembly method was then proposed for precast reinforced concrete shear walls using dry connection through a horizontal steel connector (H‐connector) and high‐strength bolts . In addition, one design‐oriented analytical model to estimate the nonlinear lateral load behavior of unbonded posttensioned walls was introduced and validated with available experimental results .…”