埋置框架的横向动力特性研究
|
摘要
提出了一种求解埋置于分层土中的框架结构受侧向瞬态荷载作用时的动力响应的简单方法。通过与其它方法比较可知 ,它具有良好的精度和稳定性。这种方法的桩周土模型采用 Winkler假定 ,它将框架结构的各梁柱单元联结起来 ,从而求得整个结构的动力响应。通过动力分析评价了不同形式的框架结构的动力特性 ,参数研究揭示了框架结构的刚度、框架材料与土的刚度比、冲击力作用时间以及荷载作用位置等因素对框架结构横向振动的影响。由于它克服了传统的静力法不能考虑结构的惯性力以及土的粘滞阻尼和动刚度的缺点 ,因而具有更广泛的适用范围
Adopting Winkler assumption, a simple approach is developed for the flexural response analysis of the framed structure embedded in layered soil under horizontal transient excitation. Good agreement between two computed results validates the present approach. The dynamic response of the frame is obtained by coupling the beams and the piles. The dynamic characteristics of various frames are evaluated through dynamic analysis. Parameter studies reveal the influences of the slenderness ratio of the pile, the pile soil stiffness ratio, the duration of the impact load and the position of the load. The traditional static method can not consider the inertial force of the structure, the dynamic stiffness and the viscous damping of the soil, therefore, the present approach is more suitable for engineering practice.
Adopting Winkler assumption, a simple approach is developed for the flexural response analysis of the framed structure embedded in layered soil under horizontal transient excitation. Good agreement between two computed results validates the present approach. The dynamic response of the frame is obtained by coupling the beams and the piles. The dynamic characteristics of various frames are evaluated through dynamic analysis. Parameter studies reveal the influences of the slenderness ratio of the pile, the pile soil stiffness ratio, the duration of the impact load and the position of the load. The traditional static method can not consider the inertial force of the structure, the dynamic stiffness and the viscous damping of the soil, therefore, the present approach is more suitable for engineering practice.
引文
1 卢世深,林亚超.桩基础的计算和分析.北京:人民交通出版社,1987;185—230
2 赵振东,傅铁铭,土岐宪三.桩头侧向集中荷载作用下桩—土系统的非线性动力性能分析.地震工程与工程振动,1997;17(3):100—108
3 MamoonS M,BanerjeeP K.Time- dom ain analysis ofdynam ically loaded single piles.Journal ofEngineeringMechanics,ASCE,1992;118(1):140—160
4 陈云敏,陈仁朋,朱 斌.打桩过程中桩的横向振动分析.振动工程学报,2001;14(2):215—219
5 ToyoakiNogam i,KazuoKonagai.Tim e domain flexuralresponse of dynam ically loaded single pile.Journal ofEngineeringMechanics,ASCE,1988;114(9):1512—1525
6 ToyoakiNogami,KazuoKonagai.Time dom ain axial re-sponse of dynamically loaded single piles.Journal ofEn-gineeringMechanics,ASCE,1986;112(11):1241—1252
7 NovakM,NogamiT,Aboul-EllaF.Dynamic soil reac-tions for plane strain case.Journal ofEngineeringMe-chanics,ASCE,1978;104(4):953—959
8 KazuoKonagai,ToyoakiNogami.Time- domain axial re-sponse of dynamically loaded pile groups.Journal ofEn-gineeringMechanics,ASCE,1987;113(3):417—430
9 BardenL .Stress and displacements in a cross-anisotropic soil.Geotehnique,1963;13(3):198—210
10BardenL .TheWinkler model and its application tosoil.StructureEngineering,1963;41(9):279—280
2 赵振东,傅铁铭,土岐宪三.桩头侧向集中荷载作用下桩—土系统的非线性动力性能分析.地震工程与工程振动,1997;17(3):100—108
3 MamoonS M,BanerjeeP K.Time- dom ain analysis ofdynam ically loaded single piles.Journal ofEngineeringMechanics,ASCE,1992;118(1):140—160
4 陈云敏,陈仁朋,朱 斌.打桩过程中桩的横向振动分析.振动工程学报,2001;14(2):215—219
5 ToyoakiNogam i,KazuoKonagai.Tim e domain flexuralresponse of dynam ically loaded single pile.Journal ofEngineeringMechanics,ASCE,1988;114(9):1512—1525
6 ToyoakiNogami,KazuoKonagai.Time dom ain axial re-sponse of dynamically loaded single piles.Journal ofEn-gineeringMechanics,ASCE,1986;112(11):1241—1252
7 NovakM,NogamiT,Aboul-EllaF.Dynamic soil reac-tions for plane strain case.Journal ofEngineeringMe-chanics,ASCE,1978;104(4):953—959
8 KazuoKonagai,ToyoakiNogami.Time- domain axial re-sponse of dynamically loaded pile groups.Journal ofEn-gineeringMechanics,ASCE,1987;113(3):417—430
9 BardenL .Stress and displacements in a cross-anisotropic soil.Geotehnique,1963;13(3):198—210
10BardenL .TheWinkler model and its application tosoil.StructureEngineering,1963;41(9):279—280
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心