แผนงานโครงสร้างย่อยแบบฟรอนทัลสำหรับวิเคราะห์ผนังด้านแรงเฉือน ด้วยไมโครคอมพิวเตอร์ / นิวัฒน์ นิลสิทธานุเคราะห์ = A frontal substructuring scheme for analysis of shear walls by microcomputer / Niwat Nillasithanukroh
This research presents a frontal [sub structuring] scheme for analysis of shear walls. The frontal [sub structuring] scheme, a hybrid of the frontal and substructure method, has proved to be suitable for shear walls with a large number of repeated substructures. This scheme has resulted in a significant saving in execution time and storage in the diskette but consumes more memory when compared to the conventional frontal method. The frontal [sub structuring] scheme assembles coefficients of member stiffness matrices and load vectors, reduces those degrees of freedom of internal nodes of substructures in level 1 and nodes which are unconnected to nodes of other elements in level 2 by Gauss elimination. The results obtained are nodal displacements and element stresses. The linear [isoperimetric] element (Q4) and quadratic [isoperimetric] element (Q8) are selected as elements for shear wall behavior representation. The cases studied in this research show that the quadratic [isoperimetric] element when the number of nodes in the structure considered is about the same. In addition, use of the Q8 element leads to saving in the execution time. The computer programme in this research is written in [Apple soft] BASIC.