Affiliation of Author(s):

土木工程学院

Journal:

Academic Journal of Xi’an Jiaotong University

Key Words:

中文关键字：桥梁工程；预应力混凝土；有效预应力；反摩阻损失，英文关键字：bridge engineering; prestressed concrete; effectiv

Abstract:

This paper studied the method for real-time acquisition and simulation on effective prestress and its application in the process of inspection and evaluation on defective state for prestressing tendon.Based on comparatively sophisticated prestressing loss method in current code, the simplified algorithm for virtual frictional loss function was put forward in a universal way. By means of obtained stress datum on strand, subordinated mode for its effective prestress distribution along longitudinal direction was able to be determined. As regards effective prestress for steel tendons with complicated geometry pattern, its regularities of distribution could be simulated after the recognition on nominal coefficients of prestress losses. In order to improve practicability of the research, analytical module was programmed on special software platform. By adopting on full-length strand of a three-span continuous beam bridge, closing verification was got eventually under the situation of taking 5 percent as error threshold. Furthermore, this method laid the foundation for evaluation and prediction on effective prestress of existing bridges.

Note:

郭琦

Co-author:

ZhanggangHeshuan-hai

First Author:

guoqi

Indexed by:

Journal paper

Volume:

卷：20

Issue:

期：3

Page Number:

页：187-192

Translation or Not:

no

Date of Publication:

2008-06-01