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施工期預(yù)應(yīng)力混凝土梁受力性能實(shí)測(cè)
王伯成1,楊秀麗2,華建民1,祝書(shū)能3
摘 要

 

1 重慶大學(xué)土木工程學(xué)院,重慶 4000452 機(jī)械工業(yè)第三設(shè)計(jì)研究院,重慶 400039;3 重慶第七建筑工程責(zé)任有限公司,重慶 400020

[摘要]以混凝土結(jié)構(gòu)的時(shí)變特性為基礎(chǔ),制定施工期預(yù)應(yīng)力混凝土梁的實(shí)測(cè)方案和內(nèi)容,通過(guò)原位實(shí)測(cè),選擇施工期預(yù)應(yīng)力混凝土梁的實(shí)測(cè)工況,根據(jù)實(shí)測(cè)數(shù)據(jù),分析預(yù)應(yīng)力梁在施工期各工況的受力重分布規(guī)律。通過(guò)分析,指出了施工工序?qū)κ┕て陬A(yù)應(yīng)力混凝土結(jié)構(gòu)受力性能的影響規(guī)律,實(shí)測(cè)數(shù)據(jù)證明了預(yù)應(yīng)力筋張拉對(duì)施工期結(jié)構(gòu)受力性能重調(diào)整的影響程度在10%~25%之間。該實(shí)測(cè)試驗(yàn)及相應(yīng)結(jié)論為施工期預(yù)應(yīng)力混凝土結(jié)構(gòu)性能的受力分析和安全控制提供了實(shí)測(cè)依據(jù)。

[關(guān)鍵詞]時(shí)變體系;預(yù)應(yīng)力混凝土;施工期;實(shí)測(cè);受力性能

中圖分類(lèi)號(hào):TU378.2文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-848X(2011)03-0059-05

Measurements onsite of characteristics of prestressed concrete beams during construction

Wang Bocheng1, Yang Xiuli2, Hua Jianmin1, Zhu Shuneng3

(1 College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2 Third Design and Research Institute,

 MI. China, Chongqing 400039, China; 3 Chongqing 7th Construction Co., Ltd.Chongqing 400020, China)

Abstract:Based on the time varying characteristics of reinforced concrete structure, the scheme and the content of on-site measurement to the prestressed concrete beams were executed. According to the on-site measurement, the measuring condition of the prestressed beams during construction was selected, and the re-distribution of internal forces during construction was analyzed. The regularity between the work condition and the structure during construction is pointed out. The ratio of the internal-force re-adjusted is proved to 10% to 25%. The above contents can be reference for analyzing the characteristics of the concrete structure and ensuring the safety during construction.

Keywords:time varying systems; prestressed concrete; during construction; on-site measurements; force characteristic

*混凝土結(jié)構(gòu)施工過(guò)程受荷及安全控制基金項(xiàng)目資助(中建總公司CSCEC-Z-05)。

作者簡(jiǎn)介:王伯成,博士研究生,一級(jí)注冊(cè)結(jié)構(gòu)工程師,Emailwangbocheng629@163.com。

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