大跨徑橋梁施工控制溫度荷載4P.pdf

大跨徑橋梁施工控制溫度荷載

針對(duì)溫度變化對(duì)大跨徑橋梁施工控制的影響，在分析溫度荷載特點(diǎn)的基礎(chǔ)上，根據(jù)變分原
理，研究了變分法確定橋梁結(jié)構(gòu)的某一特定溫度分布，對(duì)于結(jié)構(gòu)重要結(jié)點(diǎn)的分析，可采用溫度場(chǎng)有
限元分析方法來(lái)確定最不利溫度分布，對(duì)于結(jié)構(gòu)整體分析問(wèn)題，可將空間溫度場(chǎng)簡(jiǎn)記為工程變量分
離的最不利溫度分布；提出了溫度場(chǎng)分布的簡(jiǎn)化處理方法，即實(shí)用溫度分布函數(shù)— — 半徑驗(yàn)半理論
公式；以供橋梁設(shè)計(jì)和施工控制時(shí)參考。

Abstract：The change of tempperature has an influence on construction controlling for long—span
bridge．On the basis of analysing the features of temperature load，a certain temperature
distribution in bridge structure was confirmed with variational principle．As for the analysis of
important joints in structure，F(xiàn)EM of temperature field was utilized to confirm the worst—case of
temperature distribution．As for the analysis of whole structure，the space temperature field can
be simplified as the worst-case of temperature distribution by two—dimension speparation of
variables．A simple meathod was put forward to deal with the temperature distribution，that is the
useful distribution function of temperature，semi—empirical and semi—theoretical formula．These
can give reference to the design and construction of bridge．