Study on Mechanical Behavior of Castellated Beam-solid Column Cruciform Joints(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2018年04期
- Page:
- 63-71
- Research Field:
- Publishing date:
Info
- Title:
- Study on Mechanical Behavior of Castellated Beam-solid Column Cruciform Joints
- Author(s):
- NIE Shao-feng; ZHU Ji-zhao; MA Yi; YE Meng-na; SONG Long-fei
- School of Civil Engineering, Chang’an University
- Keywords:
- castellated beam-solid column cruciform joint; finite element analysis; expansion ratio; plastic hinge; mechanical behavior
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to study the mechanical behavior of castellated beam-solid column frame middle joints, 28 types of full-scale castellated beam-solid column cruciform joints(CSCJ) with different expansion ratios and hole locations were analyzed by ABAQUS finite element software. The failure modes, plastic hinge positions, hysteresis curves, skeleton curves, ductility and energy dissipation capacities of CSCJ were studied in detail. The results show that the plastic hinge of CSCJ is transferred from the node zone to the location of the first hole on the beam due to the weakened effect of the hole. The damage of node zone is avoided and the joint has good seismic performance. When the location of the first hole remains constant, the horizontal bearing capacity of CSCJ increases firstly and then decreases with the increasing of expansion ratio K. The horizontal bearing capacity reaches the peak value near K=1.4. When the expansion ratio K remains constant, the horizontal bearing capacity of CSCJ increases firstly and then tends to be steady with the increasing of the distance L between the first hole on the beam and the column. Considering the influences of the expansion ratio K and the location L of the hole on the horizontal bearing capacity and the locations of plastic hinges of CSCJ, the parameter αh=L/h is defined, and the reasonable ranges of K and αh are proposed. Within this range of value, the CSCJ has high horizontal bearing capacity, full hysteresis curve, good ductility and energy dissipation capacity, and the plastic hinge of CSCJ appears near the location of the first hole on the beam so that the CSCJ satisfies the seismic requirements of strong joints and weak members and has good seismic performance.
Last Update: 2018-07-18