 |
| كتاب الاستراكشر للدكتور سيد عبدالسلام |
كتاب الاستراكشر للدكتور سيد عبدالسلام STRUCTURAL ANALYSIS AND MECHANICS
السلام عليكم ورحمة الله وبركاته
أقدم لكم اليوم متابعينا الكرام كتاب الاستراكشر للدكتور سيد عبد السلام بصيغة pdf
مقالات من الكتاب :
INTRODUCTION :
The computation of elastic deformation for structures, either the linear deformations of points or the rotational deformations of lines (slopes) from their original position, is of great importance, not only in the design, construction of structures but also in the analysis and solution of statically
indeterminate structures. In structural design the dimensions of beams and girders are sometimes governed by the allowable deflections. It must be noted that, if the deflections of beams or frames is excessive, some problems will be produced as cracking of plaster, drainage problems,
damage of walls. Most important, the stress analysis for statically indeterminate structures is based largely upon an evaluation of their elastic deformations under load. By a statically indeterminate structure we mean a structure in which the number of unknown elements involved is greater than the number of static equilibrium equations available for solution of the equations. The elastic deformations liable to accure in the structure resulting in the external loads, temperature variation and
differential settelements between supports cause various deformations, but such elastic deformations vanish when the loads disappearent.
DEFINITIONS :
Is the displacements of various points from their original positions.
STIFFNESS :
Is the resistance of a structural element to deflection.
The deflection of a member (beam) depend on;
1- The value of loads acting on the beam.
2- The stiffness of the member, which depend on the type of material and its
modulus of elasticity (E).
3- The dimensions of elements (span, cross section)
ـــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــ
لتحميل الكتاب أضغط علي زر التحميل التالي