The distinct element method is a numerical model capable of describing the
mechanical behaviour of assemblies of discs and spheres. The method is based on
the use of an explicit numerical scheme in which the interaction of the
particles is monitored contact by contact and the motion of the particles
modelled particle by particle. The main features of the distinct element method
are described. The ... hiện toàn bộ
Dữ liệu mở rộng về độ bền và độ giãn nở của 17 loại cát trong môi trường biến
dạng đối xứng hoặc phẳng tại các mức độ đậm đặc và áp suất giới hạn khác nhau đã
được tổng hợp. Góc trạng thái tới hạn của kháng cắt của đất, khi đất chịu cắt ở
thể tích hằng định, chủ yếu là hàm của khoáng vật học và có thể dễ dàng xác định
bằng thực nghiệm trong phạm vi sai số khoảng 1°, thường là khoảng 33° đối với
th... hiện toàn bộ
#độ bền cát #độ giãn nở #trạng thái tới hạn #kháng cắt #khoáng vật học #ứng suất hiệu quả #chỉ số giãn nở tương đối
Eduardo Alonso Pérez de Ágreda, Antonio Gens, Alejandro Josa
The Paper presents a constitutive model for describing the stress-strain
behaviour of partially saturated soils. The model is formulated within the
framework of hardening plasticity using two independent sets of stress
variables: the excess of total stress over air pressure and the suction. The
model is able to represent, in a consistent and unified manner, many of the
fundamental features of the ... hiện toàn bộ
Synopsis Within the framework of limit equilibrium methods of stability
analysis, no restriction need be placed at the outset upon the shape of the
possible slip surface. In many cases, the critical surface may deviate
significantly from a circle or a plane and therefore a method that facilitates
the analysis of surfaces of arbitrary shape is of interest. A method for doing
this is presented. The ... hiện toàn bộ
A deformation measurement system based on particle image velocimetry (PIV) and
close-range photogrammetry has been developed for use in geotechnical testing.
In this paper, the theory underlying this system is described, and the
performance is validated. Digital photography is used to capture images of
planar soil deformation. Using PIV, the movement of a fine mesh of soil patches
is measured to a... hiện toàn bộ
Synopsis The aims, during the past 20 years, of the Cambridge research programme
in soil mechanics are outlined. The principal objective is to develop an
understanding of the stress–strain behaviour of soils so that reliable
predictions can be made concerning their load-deformation characteristics at all
working loads, rather than only loads at failure, in practical problems. A
superstructure and ... hiện toàn bộ
Synopsis Because of the significant influence of joints on important engineering
properties of hard un-weathered rock, a description of such rock is inadequate
for engineering purposes unless it includes reasonably complete and accurate
information concerning the spacing and orientation of the joints. Such
information can be obtained by means of a joint survey based on the examination
of outcrops,... hiện toàn bộ