Irregularities and Roughness

ARTICLE

Irregularities and Roughness


Abstract


The periodically repeated pavement irregularities and their effect on the dynamic behavior of a bridge are the subject of this paper, as well as a new point of view of how the surface roughness operates on vehicles. The authors observed that the models used so far accept that the wheels are always in contact with the roughness curve. But in reality the wheels only come in contact with the peaks of the roughness curve by applying impact forces. The theoretical formulation is based on a continuous approach that has been used in literature to analyze such bridge. The procedure is carried out by the modal superposition method, while the obtained equations are solved by using Duhamel’s integrals. Important conclusions for structural design purposes can be drawn through a variety of numerical examples.


Keywords


Irregularities;Roughness;Bridges Dynamics;Vehicle models

Full Text: PDF




Comments

Post a Comment

Popular posts from this blog

Experimental Simulation of Red Sprites in a Laboratory

Image
Experimental Simulation of Red Sprites in a Laboratory DOI:  https://doi.org/10.30564/jasr.v5i3.4858 Abstract Over the past three decades, research of high-altitude atmospheric discharges has received a lot of attention. This paper presents the results of experimental modeling of red sprites during a discharge in low-pressure air. To initiate ionization waves in a quartz tube, an electrodeless pulseperiodic discharge fed by microsecond voltage pulses with an amplitude of a few kilovolts and a repetition rate of tens of kHz were formed. In this case ionization waves (streamers) have a length of tens of centimeters. The main plasma parameters were measured at various distances along the tube. The measurements confirm the fact that ionization waves propagate in opposite directions from the zone of the main electrodeless discharge, just as it happens during the formation of red sprites. Keywords:  Red sprites, Experimental modeling, Streamer discharge in air, Low pressures
Read more

Warmly celebrate the successful convening of the the 2024 First International Symposium on Interdisciplinary Linguistics Research！

Image
  Basic Information of the Conference Organizer:  International Academic Exchange Working Committee of China Association for the Promotion of Science and Technology, "Linguistics Research Forum" Magazine Co-organizer:  International Writing Center of International Sinology Center Undertaker:  Beijing Language Bridge Education Research and Development Center Conference Time:  20-22 December 2024 Conference Venue:  Beijing University of Posts and Telecommunications Science and Technology Building, Beijing, China 1. Conference Background     With the advancement of globalization, international exchanges and cooperation are becoming increasingly close. As an important tool for human communication, language is particularly important in research and application in different fields. The "International Symposium on Interdisciplinary Linguistics Research" came into being. Relying on the international journal "Linguistics Research Forum", this conference in...
Read more

Analysis of Chinese Citizens’ Perception and Its Differences of City Spirit: A Case Study of Hefei City

Image
Analysis of Chinese Citizens’ Perception and Its Differences of City Spirit: A Case Study of Hefei City DOI:  https://doi.org/10.30564/jgr.v5i3.4788 Abstract City spirit is the soul of the city. The spread of city spirit not only could establish a civilized specimen for citizens, but also create a good cultural atmosphere for the city. Hefei residents’ perception of city spirit is extensive, and most of Hefei citizens consider the expression words of city spirit are very appropriate, which is enlightened, open-minded, actual and innovate. Great majority of Hefei citizens willing to support the propaganda and promotion of the city spirit, and they think the promotion of the city spirit plays a key role in the way of city’s development. In addition,significant differences in the perception of urban spirituality emerge among residents with different economic and social characteristics. There are four aspects about how to enhance the public perception of city spirit, which including in...
Read more