混凝土本构数据.doc

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附录一

动力弹塑性分析的材料非线性参数取值

一混凝土材料:
混凝土材料采用塑性损伤模型(Plastic-DamagedModel)(1).
根据GB50010-2002混凝土强度分类如下:
C25,C30,C35,C40,C45,C50,C55,C60,C65,C70,C75,C80

弹性模量:
按(2)表4.1.5,单位kN/m2

表1弹性模量
C25C30C35C40C45C502.8E73E73.15E73.25E73.35E73.25E7C55C60C65C70C75C803.55E73.6E73.65E73.7E73.75E73.8E7
泊松比,统一取0.2(参阅(2)的4.1.8)

剪切模量:按(2)表4.1.5中的0.4倍采用(参阅(2)的4.1.8).

密度(2):2.5T/m3

单轴应力-应变关系
混凝土材料轴心抗压和轴心抗拉强度标准值按(2)表4.1.3采用.
A:单轴受压,其应力-应变关系方程如下(参阅(2)C.2.1,P206):
当时

当时

在0–0.7fc的应力范围为线弹性,其弹性模量按表1.大于0.7fc为塑性范围,应力-塑性应变关系如下:

B:单轴受拉,其应力-应变关系方程如下(参阅(2)C.2.2,P208):
当时

当时

在0–ft的应力范围为线弹性,其弹性模量按表1.大于ft为塑性范围,应力-塑性应变关系如下:

据此得到下列各等级混凝土材料在拉和压屈服后的应力(kN/m2)-塑性应变关系:
*Material,Name=C25
*Concretecompressionhardening
应力(kN/m2) 塑性应变
11690., 0
16700.,0.000808693
13239.8,0.00233739
9841.27,0.00386389
7674.36,0.0053464
6248.49,0.00680245
5255.01,0.00824305
4527.98,0.00967414
3974.73,0.011099
3540.4,0.0125197
*Concretetensionstiffening
1797.8,0
1780.,0.000025515
1191.06,0.000135635
859.483,0.000236563
684.527,0.000331898
576.455,0.000424844
502.469,0.000516573
448.233,0.000607596
406.519,0.000698173
373.278,0.000788446
131.57,0.00355876

*Material,Name=C30
*Concretecompressionhardening
14070.,0
20100.,0.000801898
14636.6,0.00245591
10073.3,0.00407992
7500.85,0.00563756
5931.13,0.00716179
4889.86,0.00866839
4153.49,0.0101648
3607.,0.011655
3186.09,0.0131409
*Concretetensionstiffening
2030.1,0
2010.,0.0000282563
1232.19,0.00014944
849.073,0.000257466
660.524,0.000359008
548.371,0.000458002
473.404,0.000555757
419.357,0.000652815
378.298,0.00074944
345.892,0.000845777
118.271,0.00380631

*Material,Name=C35
*Concretecompressionhardening
16380.,0
23400.,0.000789431
15814.6,0.00256253
10267.4,0.00427092
7408.77,0.00589395
5749.74,0.00747891
4682.74,0.00904507
3943.69,0.0106008
3403.29,0.0121503
2991.69,0.0136956
*Concretetensionstiffening
2222.,0
2200.,0.0000301427
1253.05,0.000160189
834.315,0.000273466
638.442,0.000379668
524.938,0.000483255
450.278,0