دانلود رایگان مقاله لاتین آنالیز الاستیک از سایت الزویر
عنوان فارسی مقاله:
آنالیز الاستیک تاریخ زمان دینامیک فولاد بدنه با استفاده از یک عنصر برای هر عضو
عنوان انگلیسی مقاله:
Dynamic Time-history Elastic Analysis of Steel Frames Using One Element per Member
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Time-history analysis is an effective simulation-based method for evaluating the structural behaviors under the transient actions, such as earthquake attacks, accidental impacts, and progressive collapse. This method is a step-by-step integration in a time domain, bringing a rational simulation of the structure subjected to the dynamic excitations. However, this procedure is usually computationally costly, mainly since a small size of time step needs to be adopted for the precision and stability in the analysis. As reported by Nguyen [1], the most time-consuming portion in the finite element analysis (FEA) algorithm is to solve the sparse, linear equations containing the tangent stiffness matrix, incremental degree-of-freedoms (DOFs) and the external force vector. For example, if a structure is modeled by two schemes, e.g. N elements with M nodes and 4N elements with 2M nodes, the size of the stiffness matrix of the latter will be four times as large as that in the former, and the calculation time increases in line with the matrix's size. Therefore, a dramatic saving on the computational expense can be achieved when fewer elements are used in a structural system. Some researchers have utilized the nonlinear dynamic analysis method for studying the response of steel frames under the transient motions, such as Nader and Astaneh [2], Chui and Chan [3], Awkar and Lui [4], Chan and Chui [5], Gupta and Krawinkler [6], Foutch and Yun [7], Ohtori et al. [8], Silva et al. [9] and Nguyen and Kim [10] and so on. Nowadays, the time-history analysis method has already become one of the effective tools for seismic design of structures, and is codified in the modern seismic design standards, such as Eurocode 8 [11]. The prominent emphasis in designing steel members and structures is the consideration of stability problems, and thereby, second-order effects in terms of P-Δ and P-δ effects should be properly captured in analysis. Global frame and local member imperfections should be necessarily taken into account, otherwise, the factors of instability lying in the structural system and the members cannot be effectively detected. Frame imperfection is usually applied according to the Eigen-buckling mode shapes [12], while the local member imperfection is simulated using a sine curve (see Fig. 1). The conventional method adopts several straight elements to represent the imperfection, and it causes extra manipulating efforts in offsetting the nodes. To this end, one-elementper-member model is employed in the present study, not only the computer time can be dramatically reduced, but also does it bring convenience in modeling the initial member imperfections according to the requirements in the modern design codes. This research aims to extend the application of this analytical model to the dynamic time-history analysis for seismic design. Therefore, the selection of a beam-column element, which should be initially curved and can simulate large deformation in an element, is vital and essential for a successful analysis using a one-element-permember model. Therefore, several sophisticated elements have been developed in the recent decade, especially aiming for simulating slender members with imperfections. The Pointwise-Equilibrium-Polygonal (PEP) beam-column element with the high-order shape function is derived by Chan and Zhou [13], and has been extensively adopted in the practice over the past 16 years. Subsequently, Chan and Gu [14]
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کلمات کلیدی:
Handbook of Structural Engineering https://books.google.com/books?isbn=1439834350 W.F. Chen - 1997 - Technology & Engineering Dynamic response spectrum analysis shall be used for the local and ... Linear elastic dynamic time history analysis — Linear elastic dynamic time history ... [PDF]SEISMIC TIME HISTORY AND NON-LINEAR ANALYSIS OF LARGE ... www.iitk.ac.in/nicee/wcee/article/14_14-0005.PDF by H ZHANG - Related articles The previous dynamic analysis about the hydropower station structure regarded ... In the past few years, with the development of the elastic-plastic FEM theory of ... Seismic analysis - Wikipedia https://en.wikipedia.org/wiki/Seismic_analysis Jump to Linear dynamic analysis - In the linear dynamic procedure, the building is ... a linear elastic stiffness matrix and an equivalent viscous ... The seismic input is modelled using either modal spectral analysis or time history analysis ... Bridge Engineering: Seismic Design - Page 5-17 - Google Books Result https://books.google.com/books?isbn=1420039784 W.F. Chen, Lian Duan - 2003 - Technology & Engineering Site-specific multisupport dynamic time histories should be used in a dynamic time-history analysis [33]. • Linear elastic dynamic time-history analysis is defined ... [PDF]Linear Time History Analysis of MDOF Structure by Mode ... alum.sharif.edu/~tazarv/download/Linear-Modal-Time-History-Analysis-V1.1.pdf Structural dynamic is a mandatory graduate level course for ... Here, I will introduce a MATLAB function which can do a time history analysis of an n-DOF structure .... that displacement and elastic force response will be in m and N, respectively. Bridge Engineering Handbook - Page 37-17 - Google Books Result https://books.google.com/books?isbn=1420049593 Wai-Fah Chen, Lian Duan - 1999 - Technology & Engineering Dynamic Time History Analysis: Site-specific multisupport dynamic time histories should be used in a dynamic time history analysis [33]. • Linear elastic dynamic ... People also ask What is the meaning of pushover analysis? What is a response spectrum analysis? What is seismic analysis? What is response spectrum method? Feedback Searches related to Dynamic Time-history Elastic Analysis time history analysis definition time history analysis theory time history analysis procedure time history analysis vs response spectrum analysis time history analysis pdf time history analysis example time history method seismic analysis time history analysis sap2000
