Study of Buckling Stability on Tall Tower Truss Structure with All Loads

Yixiao Qin

doi:10.11648/j.ijsts.20160404.11

Abstract

Tower crane belongs to tall towers truss structures, whose bucking instability often lead to collapse. Past studies focused on the mast instability under a single load, which doesn’t apply to the actual condition that tower crane working under various loads at the same time. This paper taking into consideration the tower crane lifting weight as well as various loads like the hoist tipping moment, heavy vertical load, wind load, the centrifugal force, rotary load of resistance and horizontal inertia force. Through the eigenvalue bucking and nonlinear bucking analysis, we can get the lifting load when the hoisting is focusing on a maximum working range of the arm of the tower and tower bar force status and the convergence map of stability. This study provides the complete steps of the tower stability design of tower crane, can be used as a guidance or reference for the actual product design.

Highlights

The truss tower is the main supporting structure of the tower crane, whose loading condition is quite complicated, and analyzing its working condition is sincerely difficult
With the frequent accidents of tower crane, studying in this area recently attracted the attention of researchers, [1-5] studied the stability problem of two bar truss, [6-9] studied the factors that affect the truss structure of local stability, [10] studied instability of the mast tower crane in static load without wind, under the condition of changing the amplitude of the loading, [11-13] studied the stability of the tower in turbulent winds
Changing the weight and the range of loads to obtain the precise tower crane buckling critical loads, in order to get the convergence map of stability, because the past papers studying in this field was rare and not enough, on one hand, the research what we studying was of significance, on the other hand, It provides useful basis data for tower crane design in order to guarantee the stability of the crane

Summary

Introduction

The truss tower is the main supporting structure of the tower crane, whose loading condition is quite complicated, and analyzing its working condition is sincerely difficult. Changing the weight and the range of loads to obtain the precise tower crane buckling critical loads, in order to get the convergence map of stability, because the past papers studying in this field was rare and not enough, on one hand, the research what we studying was of significance, on the other hand, It provides useful basis data for tower crane design in order to guarantee the stability of the crane

Buckling Analysis Model on Tall Tower Truss Structure

Eigenvalue Buckling Analysis

Nonlinear Buckling Analysis

Conclusions