外文翻譯——預(yù)應(yīng)力混凝土建筑-建筑結(jié)構(gòu)-預(yù)覽頁
【正文】 es the spacing of tendons and ducts. The general rules are that the clear spacing small be oneandonehalf times the maximum size of coarse aggregate. In the overall section, provision must be made for the vibrator stinger. Thus prestressing tendons must either be spaced apart in the horizontal plane, or, in special cases, bundled. In the vertical plane close contact between tendons is quite mon. With posttensioned ducts, however, in intimate vertical contact, careful consideration has to be given to prevent one tendon form squeezing into the adjacent duct during stressing. This depends on the size of duct and the material used for the duct. A fullscale layout of this critical cross section should be made. Usually, the best solution is to increase the thickness ( and transverse strength ) of the duct, so that it will span between the supporting shoulders of concrete. As a last rest\ort it may be necessary to stress and grout one duct before stressing the adjacent one. This is timeconsuming and runs the risks of grout blockage due to leaks from one duct to the other. Therefore the author remends the use of heavier duct material, or else the respacing of the ducts. The latter, of course, may increase the prestressing force required. 中文翻譯： 預(yù)應(yīng)力混凝土建筑 預(yù)應(yīng)力混凝土已經(jīng)廣泛并成功地用于各種類型的建筑。其優(yōu)點(diǎn)體系在下述各項(xiàng)； 結(jié)構(gòu)強(qiáng)度；結(jié)構(gòu)港督；耐久性；可塑性，可制成所需求的方式和形狀；抗火性；表面的建筑處理；隔聲；絕熱；經(jīng)濟(jì)性；可行性，可通過使用本地原料和勞動力達(dá)到較高的程度。更重要的是，它為建筑師提供了一種變化的自由，以及在各種服務(wù)條件下的行為控制能力。由于其具有預(yù)應(yīng)力混凝土施工方面的專業(yè)技術(shù)知識，他將為建筑師和工程師提供非常必要的服務(wù)。 第三，施工工程師應(yīng)該在結(jié)構(gòu)完工之前，注重鋼筋的臨時應(yīng)力、松弛應(yīng) 力、截取、加工和安裝階段的應(yīng)力，以及臨時條件，如復(fù)合灌注時所需的支柱支撐。國際預(yù)應(yīng)力聯(lián)盟試圖通過建立文化交流服務(wù)來散布這些信息，大約 30多個國家的預(yù)應(yīng)力雜志進(jìn)行了交流。 參照施工圖，施工工程師必須按照最實(shí)際和最經(jīng)濟(jì)的要求，盡力將設(shè)計(jì)進(jìn)行細(xì)節(jié)化處理，這樣全部構(gòu)件或結(jié)構(gòu)就能和設(shè)計(jì)需求保持一致。 采用后張法 ，錨具已經(jīng)它們的承載板，必須在其物理尺寸內(nèi)進(jìn)行布置。采用梁或者較小的肋（有時采用較重的金屬網(wǎng)），且梁要盡可能的靠近端部，將有助于控制并分散集中力。 控制點(diǎn)處也可能設(shè)有附加鋼筋肋以抵抗剪力這種做法在后張預(yù)應(yīng)力筋存在明顯的彎曲時也是正確的。 在垂直平面內(nèi)鋼筋的密集接觸實(shí)際其常見的。 最后有必要作的是在對相鄰管道施加預(yù)應(yīng)力之前，對管道進(jìn)行預(yù)應(yīng)力處理和灌漿。
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號-1