冷弯薄壁型钢矩形截面构件稳定性能研究
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摘要
随着近几年冷弯薄壁型钢住宅结构的出现及推广,集成装配式薄壁轻钢结构体系得到广泛的应用。对于这种结构体系整体的稳定性能与其组成构件及连接节点的稳定性直接相关。由于板件宽厚比较大,此类薄壁梁柱构件极易出现局部屈曲且具有较高的屈曲后强度,因此该类构件的稳定性能包括静力及动力性能不同于厚壁普通钢构件。本文基于构件耗能理论,探讨塑性发展耗能与局部屈曲变形耗能对于构件稳定性能的不同影响,总结矩形薄壁构件的恢复力模型,对其在工程中的实际应用具有重要的指导意义。
本文主要研究内容分为四部分：第一部分,有限元原理导入及数值模型的验证。通过基本理论及有限元数值建模与试验结果比较,验证数值模型的正确性及可应用性。第二部分,冷弯薄壁型钢矩形截面短柱稳定性能分析,包括静力稳定性能及常轴力和循环弯矩作用下的动力稳定性能分析。这一部分通过大量的数值模拟分析结果,分析材料参数(屈服强度、强屈比),几何参数(截面宽厚比、截面高宽比、长细比),荷载参数(轴压力)等系列因素对短柱构件的屈曲稳定、耗能机理、失效模式等的影响,考察地震作用下构件的耗能机理。第三部分,冷弯薄壁型钢矩形截面长柱稳定性能分析,包括静力稳定性能及常轴力和循环弯矩作用下的动力稳定性能分析。这一部分通过大量的数值模拟分析结果,分析各参数对长柱构件的屈曲稳定、耗能机理、失效模式等的影响,考察地震作用下长柱构件的耗能机理。第四部分,通过二三章归纳的不同失效模式对应构件的不同规律,总结并提出冷弯薄壁矩形截面构件在地震荷载作用下的恢复力模型。
In recent years, with the emergence and development of cold-formed thin-wall steel dwelling houses, integrated fabricated thin-walled light steel structure system has been widely used. For this kind of structure system, the whole stability performance is directly related to the stability of its components and connecting nodes. Element sections are liable to local and appear higher buckling strength for the larger width-to-thickness ratio of plates. So the stability of thus components including static and dynamic performance is different from common steel members. This paper, based on the theory of energy consumption, clarifies the effects of energy-dissipation modes between plastic development and the local buckling deformation on the stability performance of thin-walled rectangular steel components, and summarizes the restoring force model of such components. That offers the important guiding significance to the actual application of the project.
The main contents of this paper are divided into four parts.The first part is the finite element theory and validated numerical model. It valued the validity and applicability for the numerical model by the comparation between the experimental results and finite element numerical modeling results.The second part analyses the stability performance of short columns including static stability and dynamic stability performance.In this part, influence of some parameters like material property(yield strength, strength-yield ratio), geometry parameters (high-to-width ratio, slenderness ratio), load parameters (axial pressure) on the buckling failure modes and energy-dissipation mechanism has been evaluated. The third part focuses on the stability performance of long columns. Based on the previous two parts, the fourth part summarize three different failure modes of inductive components, and put forward the restoring force model of cold-formed thin-wall rectangular section components.
本文主要研究内容分为四部分：第一部分,有限元原理导入及数值模型的验证。通过基本理论及有限元数值建模与试验结果比较,验证数值模型的正确性及可应用性。第二部分,冷弯薄壁型钢矩形截面短柱稳定性能分析,包括静力稳定性能及常轴力和循环弯矩作用下的动力稳定性能分析。这一部分通过大量的数值模拟分析结果,分析材料参数(屈服强度、强屈比),几何参数(截面宽厚比、截面高宽比、长细比),荷载参数(轴压力)等系列因素对短柱构件的屈曲稳定、耗能机理、失效模式等的影响,考察地震作用下构件的耗能机理。第三部分,冷弯薄壁型钢矩形截面长柱稳定性能分析,包括静力稳定性能及常轴力和循环弯矩作用下的动力稳定性能分析。这一部分通过大量的数值模拟分析结果,分析各参数对长柱构件的屈曲稳定、耗能机理、失效模式等的影响,考察地震作用下长柱构件的耗能机理。第四部分,通过二三章归纳的不同失效模式对应构件的不同规律,总结并提出冷弯薄壁矩形截面构件在地震荷载作用下的恢复力模型。
In recent years, with the emergence and development of cold-formed thin-wall steel dwelling houses, integrated fabricated thin-walled light steel structure system has been widely used. For this kind of structure system, the whole stability performance is directly related to the stability of its components and connecting nodes. Element sections are liable to local and appear higher buckling strength for the larger width-to-thickness ratio of plates. So the stability of thus components including static and dynamic performance is different from common steel members. This paper, based on the theory of energy consumption, clarifies the effects of energy-dissipation modes between plastic development and the local buckling deformation on the stability performance of thin-walled rectangular steel components, and summarizes the restoring force model of such components. That offers the important guiding significance to the actual application of the project.
The main contents of this paper are divided into four parts.The first part is the finite element theory and validated numerical model. It valued the validity and applicability for the numerical model by the comparation between the experimental results and finite element numerical modeling results.The second part analyses the stability performance of short columns including static stability and dynamic stability performance.In this part, influence of some parameters like material property(yield strength, strength-yield ratio), geometry parameters (high-to-width ratio, slenderness ratio), load parameters (axial pressure) on the buckling failure modes and energy-dissipation mechanism has been evaluated. The third part focuses on the stability performance of long columns. Based on the previous two parts, the fourth part summarize three different failure modes of inductive components, and put forward the restoring force model of cold-formed thin-wall rectangular section components.
引文
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[4]周绪红,石宇,周天华等.低层冷弯薄壁型钢结构住宅体系.建筑科学与工程学报,2005.(6).
[5]弓晓芸.浅谈轻钢结构低层住宅[J].钢结构,2001,16(6)：27-29.
[6]冷弯薄壁型钢结构技术规范(GB50018-2002)[S].北京：中国计划出版社,2003.
[7]陈骥.钢结构稳定理论.第2版[M].北京：科学出版社,2003.
[8]K.K.V.Devarakonda, C.W.Bert. Flexural vibration of rectangular plates subjected to sinusoidally distributed compressive loading on two opposite sides. Journal of Sound and Vibration, 2005,283(3-5):749-763.
[9]高轩能,孙祖龙.槽形截面腹板非均匀受压的屈曲后强度研究.力学与实践,1993,Vol.5：35-39.
[10]颜少荣.薄壁槽钢受压承载力计算的有效宽厚比法.五邑大学学报(自然科学版).2001,15(3).
[11]孟春光,张伟星.无单元法在薄板稳定问题中的应用.力学与实践,2004,Vol.2.
[12]谈梅兰,吴光,王鑫伟.矩形薄板面内非线性分布载荷下的辛弹性力学解.工程力学,2008,Vol.10.
[13]J.Tani, T.Nakamura.Dynamic stability of annular plates under periodic radial loads. Journal of the Acoustical Society of America,1978. Vol.64(3):827-831.
[14]Fukumoto,Y., Kusama.H. Local instability tests of plate elements under cyclic uniaxial loading. Journal of Structural Engineering, ASCE1985; 111(5):1051-1067.
[15]Shigeru Banno, Iraj H. P. Mamaghani, Tsutomu Usami, Member, ASCE, and Eiji Mizuno.Cyclic Elastoplastic Large Deflection Analysis of Thin Steel Plates. Journal of Engineering Mechanics.1998,Vol 124(4).
[16]董永涛.单向荷载和循环荷载作用下钢板件及板组的屈曲后性能研究[D].哈尔滨：哈尔滨建筑科技大学,博士学位论文,1995.
[17]朱媛媛,程吕钧.粘弹性矩形板的稳定性分析.固体力学学报,1996,Vol.3.
[18]苏明周,顾强,宋振森.箱形截面钢短柱在拉压循环荷载作用下的滞回性能和翼缘宽厚比限值.[J].土木工程学报,2000,Vol.33(5)：13-18.
[19]苏明周,顾强,郭兵.箱形截面钢压弯试件受循环弯矩作用的试验研究和理论分析.[J].建筑结构学报,2001,Vol.22(4)：9-16.
[20]肖世富 陈滨刘才山.轴对称匀速转动状态下矩形薄板的动态特性与屈曲分析.北京大学学报：自然科学版.2005,Vol(3).
[21]Demao Yang, Gregory J Hancock, K.J.R Rasmussen MScEng.Compression Tests of Cold-Reduced High Strength Steel Long Columns.Research Report No R816.March,2002.
[22]Kat,B.,Nishiyama,I., Inelastic Local Buckling of Cold-Formed Circular Hollow Section and Square Hollow Section Members. Japan-US Seminar on Inelastic Instability of Steel Structures and Structural Elements.Tokyo, Japan,1981.
[23]Ben Young, M.ASCE, Gregory J. Hancock. Compression tests of channels with inclined simple edge stiffeners. Journal of Structural Engineering.2003,Vol.129 (10):1403-1411.
[24]Yu,W.W.,R.A.Lalloube. Activities of the center for Cold-Formed Steel Struetures.Proceedings of the 11th Specialty Conference on Cold-Formed Steel Struetures. University of Missouri-Rolla,1992:213-223.
[25]曾锋.冷弯薄壁矩形钢管板组相关屈曲性能研究[D].西安建筑科技大学硕士学位论文,2003.
[26]吴亚舸,张其林.铝合金梁弯扭稳定系数的试验研究及数值分析.建筑结构学报.2006,27(5).
[27]周天华,何保康,周绪红等.高强冷弯薄壁型钢轴压长柱受力性能试验研究.建筑科学与工程学报.2005,4.
[28]邓科,郭彦林.轴心受压梭形变截面钢管格构柱的弹性屈曲性能.工程力学.2005,4.
[29]Yoshiaki Goto, Qingyun Wang and Makoto Obata. FEM Analysis For Hysteretic Behavior of Thin-Walled Columns. Journal of Structural Engineering.1998,(124):1290-1301.
[30]Elcalakani M. and Zhao X.L. Bending tests to determine slenderness limits for cold-formed circular hollow sections. Journal of Construction Steel Research.2002 (58):1407-1430.
[31]Goggins J.M., Broderick, B.M., Elghazouli A.Y., Lucas A.S. Behaviour of tubular steel members under cyclic axial loading. Journal of Constructional Steel Research,2006;62(1-2).
[32]董永涛,张耀春.板件在单轴往复荷载作用下非线性屈曲分析的有限元法.哈尔滨建筑工程学院学报.1994,1.
[33]王士奇.冷成型薄壁钢构件拉压滞回性能数值分析[D].南京：南京工业大学,2005.5.
[34]Wantanabe E. Modeling of Hysteretic Behavior of Thin-walled Box Members. In Fukumoto Y, Lee G, eds. Stability and Ductility of Steel Structures under Cyclic Loading. New York:CRC Press,1992,133-143.
[35]Chi Shen, Iraj H. P. Mamaghani, Eiji Mizuno, and Tsutomu Usami. Cyclic Behavior of Structural Steels.Ⅱ:Theory. Journal of Engineering Mechanics.1995,Vol121(11).
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