Study on Adjustable Connector of Reciprocal Frame

Abstract

In this paper, we design an adjustable connector of reciprocal frame, and a three-dimensional solid model of this connector with Circular Hollow Section has been created in the FEM software Abaqus CAE to study its mechanical properties. When the plastic hinge is formed at the end of the Circular Hollow Section, the connector is still in an elastic state. It is concluded that the adjustable connector of reciprocal frame has high strength and rigidity, realizing the goal for designing higher connector strength over Circular Hollow Section strength. Then parametric analysis is used to analyse the influence of the connector about each part on the mechanical properties, and the flexural rigidity of the connector has been derived. A three-dimensional wire model of reciprocal frames has been created in the FEM software Abaqus CAE, and a full-scale test model of the structure is designed. The numerical simulation results agree well with the test results. It is verified that the reliability of the modeling method and the accuracy of the connector mechanical model.

Study on Prefabricated Connector of Double-Layer Reciprocal Frame

“…With the development of reciprocal frame, lashed connection and notched connection appeared [5]. Because the low strength and small rigidity of the connection, reciprocal frame cannot reach larger span [14][15].…”

“…In 1976, the first patent of connector in reciprocal frame, bolted connectors, was proposed by Bijnen. He suggested to loop the circular hollow sections via threaded pins to form reciprocal frame [14][15]. The connector is very simple, and is of high strength and great rigidity.…”

“…However, this connector requires high precision of reserved holes and threaded pins which results in great difficulties for construction and even reducing the efficiency of construction. In addition, two adjacent members connected by this connector rotate result in small rigidity and low strength of the whole structure [15]. The adjustable connector is a kind of prefabricated connection.…”

“…The adjustable connector is a kind of prefabricated connection. The strength and rigidity of this kind of connector is much higher, and the unique structure compensates for installation error of the members [15]. However, the adjustable connector is only suitable for single-layer reciprocal frame, which cannot reach large span.…”