Calculating method for flexural bearing capacity and bending moment-rotation curve of concrete-filled steel tube column-steel beam penetrated bolt connecting joint

Abstract

The invention discloses a calculating method for flexural bearing capacity and a bending moment-rotation curve of a concrete-filled steel tube column-steel beam penetrated bolt connecting joint. The calculating method for the joint flexural bearing capacity comprises the following steps that the corresponding joint flexural bearing capacities are calculated when bending failure of a terminal plateor a T-shaped piece flange occurs to the joint, when pulling failure of penetrated bolts occurs to the joint, when transversely pressing failure of columns occurs to the joint, when shearing failureof a joint region occurs to the joint and when a steel beam forms plastic hinge failure is calculated, the minimum value of the five flexural bearing capacities is the actual flexural bearing capacityof the joint, and a corresponding failure mode is an actual failure mode of the joint. The calculating method for the bending moment-rotation curve of the joint comprises the following steps that initial rotating rigidity of the joint is obtained through an experiment or simulation or theoretical calculation, and then the initial rotating rigidity of the joint and the joint flexural bearing capacity are substituted into a provided exponential model of a bending moment-rotation relationship to obtain the bending moment-rotation curve of the joint. The calculating method for the flexural bearing capacity and the moment-rotation curve of the concrete-filled steel tubular column-steel beam penetrated bolt connecting joint avoids large quantity of experiments or simulation which are needed inprevious design of joints of the type and has the advantages that the calculation is easy and convenient, the time and labor are saved, the cost is low and the like.

Description

technical field [0001] The invention relates to a calculation method for the flexural bearing capacity and bending moment-angle curve of a concrete-filled steel pipe column-steel beam through-bolt connection joint, which is suitable for the semi-rigid design of this type of joint, and belongs to the steel pipe concrete column-steel beam through-hole bolt Connection node design field. Background technique [0002] The concrete-filled steel tube column-steel beam through-bolt connection joint is a new type of joint that connects the steel-filled steel tube concrete column and steel beam by using through-hole bolts and end plates or T-shaped pieces. The concrete-filled steel tube column is a component with high compressive bearing capacity, good plastic toughness, and good local stability; the bolted joint has the characteristics of convenient construction and good ductility, so the joint between the concrete-filled steel tube column-steel beam through-bolt joint combines the t...

AI Technical Summary

Problems solved by technology

However, these calculation methods and moment-rotation curve models are aimed at steel structure connection nodes, and cannot be directly applied to CFST column-steel beam through-bolt connection nodes

In addition, the bending moment-rotation curve model used in the past for steel structure bolted connections often requires a large amount of test data to fit, and the accuracy of the model needs to be further improved

For concrete-filled steel tube column-steel beam through-bolt connection joints, it is time-consuming, laborious and costly to determine the bending moment-angle curve through experiments

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