Experimental Study on Novel Energy‐Dissipating Prefabricated Beam‐Column Joints

Abstract

A new dapped-end beam to column connection is designed in this paper. Its assembly connection zone changes from inside the joint to midspan of the beam. The proposed connection can not only provide good structural integrity but also ensure that the plastic hinge moves away from the column edge. The rotational capacity of the plastic hinge determines the internal force redistribution of the joint and the energy dissipation capacity. The high-strength bolts and steel plates are used to realize connection, further enhancing the rotation of the plastic hinge and minimizing the cast-in-place concrete volume. Three full-scale exterior beam to column joints are casted and then subjected to reversal cyclic loading. The finite element (FE) analyses are carried out to compare with experimental results and study the effect of connection position on the structural behaviours. The obtained results show that the plastic hinges of all three specimens are firstly developed to a distance from the column edge, thus revealing that this kind of joint can achieve beam hinge mechanism and prevent joint shear failure. And the connection position is the most disadvantaged when coinciding with the plastic hinge zone, which would result in the excessive deformation and the early failure of the steel bar anchor system. The new type of joint shows good seismic performance during earthquake if the connection can be properly designed, and thus this kind of structural form can be applied to actual engineering structures in seismic regions.

Experimental Study on the Progressive Collapse Resistance of Two‐Storey Half‐Scale Fabricated Reinforced Concrete Column‐Steel Beam Composite Frame Structure

“…e structural prototype in this study is a fabricated RCS composite frame structure (five-storey, 3 × 4-bay), which is designed in accordance with the requirements of Chinese building codes [23][24][25][26][27]. Live and dead load values on floors and roof are 2.0 and 2.0 KN/ m 2 , respectively.…”

Investigation of the process of perforating hard roof in an innovative technology of directional roof‐cutting by composite blasting

“…Therefore, the hard roof has always been a problem for safe and efficient mining in coal mines. To solve the hard roof problem in coal mines, many scholars have conducted in‐depth research and proposed various hard roof control technologies, such as ground fracturing, hydraulic fracturing, concentrated blasting, water injection softening, and so forth 2–4 . These technologies have achieved very good control results for hard roofing.…”

“…proposed various hard roof control technologies, such as ground fracturing, hydraulic fracturing, concentrated blasting, water injection softening, and so forth. [2][3][4] These technologies have achieved very good control results for hard roofing.…”

Effect of Reinforcement Forms on the Load Bearing Capacity of Prefabricated Box Culvert

“…[29][30][31][32]. Presently, investigations on the behaviors of prefabricated structures under the shear load, flexural load, and cyclic load have been conducted [33][34][35][36]. Ding et al [37] study the seismic performance of a semi-rigid connector between autoclaved lightweight concrete (ALC) panel and steel frame, which showed that the use of the semi-rigid connector can effectively reduce the damage of ALC panel.…”