薛伟辰, 周氐, 吕志涛. 混凝土杆系结构滞回全过程分析[J]. 工程力学, 1996, 13(3): 8-16.
引用本文: 薛伟辰, 周氐, 吕志涛. 混凝土杆系结构滞回全过程分析[J]. 工程力学, 1996, 13(3): 8-16.
Xue Weichen, Zhou Di, Lu Zhitao. FULL-RANGE HYSTERESIS ANALYSIS OF CONCRETE FRAME AND TRUSS STRUCTURES[J]. Engineering Mechanics, 1996, 13(3): 8-16.
Citation: Xue Weichen, Zhou Di, Lu Zhitao. FULL-RANGE HYSTERESIS ANALYSIS OF CONCRETE FRAME AND TRUSS STRUCTURES[J]. Engineering Mechanics, 1996, 13(3): 8-16.

混凝土杆系结构滞回全过程分析

FULL-RANGE HYSTERESIS ANALYSIS OF CONCRETE FRAME AND TRUSS STRUCTURES

  • 摘要: 本文基于非线性有限元原理,采取由材料本构关系直接形成单元M—N—φ关系的方法,推导了混凝土杆系结构的单元刚度矩阵,该矩阵考虑了材料非线性、几何非线性、轴力二次矩、混凝土的裂面效应、预应力的特点、钢筋的粘结滑移以及材料的双切线模量等的影响;编制了相应的分析程序,并对两榀混凝土门架的滞回性能进行了模拟计算,计算值与试验结果吻合较好。本文程序实现了混凝土杆系结构包括下降段在内的滞回全过程分析,从而为该类结构的抗震研究提供了一个准确、实用的工具。

     

    Abstract: The element stiffness matrices of concrete frame and truss structures are derived in this paper based on the principle of nonlinear finite element-Utilizing the method that M-N-φ relations of element are formed directly from physical properties of material, the influence of material nonlinearity, geometric nonlinearity, effect of N-Δ, local contact effect of cracked concrete section, effect of prestressing, slip of anchor bars as well as the loading and unloading tangent modulus of material are all taken into account in the element stiffness matrices. Imitative calculations of hysteresis behavior of two concrete portal-frame specimens under reversed cyclic loading are carried out by using the corre-sponding analysis program, and results are in good agreements with experimental results. This program is capable of full-range hysteresis analysis of concrete frame and truss structures including decending part, providing an accurate and practical method for studies on seismic behavior of this kind of structures.

     

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