Bending moment

About: Bending moment is a research topic. Over the lifetime, 14577 publications have been published within this topic receiving 158834 citations. The topic is also known as: bending moment.

Lateral load analysis of single piles and drilled shafts

Abstract: The p‐y method of analysis models nonlinear behavior, and is an effective method of designing deep foundations subjected to, lateral loads Deflections and bending moments calculated using p‐y analyses have usually been found to be in good agreement with field measurements This paper describes a method of analysis, the characteristic load method (CLM) that is simpler than p‐y analyses, but that closely approximates p‐y analysis results The method uses dimensional analysis to characterize the nonlinear behavior of laterally loaded piles and drilled shafts by means of relationships among dimensionless variables The new method is simple enough for use by manual calculation, and it can also be adapted for computer use Lateral deflections and maximum bending moments calculated using CLM have been found to be in good agreement with values measured in field load tests

Effects of near‐fault ground motions on the nonlinear dynamic response of base‐isolated r.c. framed buildings

Abstract: SUMMARY Near-fault ground motions are characterized by long-period horizontal pulses and high values of the ratio between the peak value of the vertical acceleration, PGAV, and the analogous value of the horizontal acceleration, PGAH, which can become critical for base-isolated (BI) structures. The objective of the present work is to check the effectiveness of the base isolation of framed buildings when using High-Damping-Rubber Bearings (HDRBs), taking into consideration the combined effects of the horizontal and vertical components of near-fault ground motions. To this end, a numerical investigation is carried out with reference to BI reinforced concrete buildings designed according to the European seismic code (Eurocode 8). The design of the test structures is carried out in a high-risk region considering (besides the gravity loads) the horizontal seismic loads acting alone or in combination with the vertical ones and assuming different values of the ratio between the vertical and horizontal stiffnesses of the HDRBs. The nonlinear seismic analysis is performed using a step-by-step procedure based on a two-parameter implicit integration scheme and an initial-stress-like iterative procedure. At each step of the analysis, plastic conditions are checked at the potential critical sections of the girders (i.e. end sections of the sub-elements in which a girder is discretized) and columns (i.e. end sections), where a bilinear moment–curvature law is adopted; the effect of the axial load on the ultimate bending moment (M-N interaction) of the columns is also taken into account. The response of an HDRB is simulated by a model with variable stiffness properties in the horizontal and vertical directions, depending on the axial force and lateral deformation, and linear viscous damping. Copyright © 2011 John Wiley & Sons, Ltd.

Analysis of Laterally Loaded Piles in Weak Rock

Abstract: The p-y method for the analysis of piles under lateral loading is extended here to the analysis of single piles in rock. Rational equations are presented for developing a solution, but the method is termed “interim” principally because of the meager amount of experimental data available to validate the equations. Nonlinearity, both in the p-y curves and in the bending stiffness of the pile, must be considered in solving for the loading that will cause a failure in bending, deflection, or buckling under combined loading. Two case studies are presented whereby the analytical method is shown to agree well with results from experiments. However, loading tests of full-sized piles are recommended at any site where a sizable number of piles are needed, to further improve the analytical method presented herein.