正拱度 的英文怎麼說
中文拼音 [zhēnggǒngdù]
正拱度
英文
positive camber-
The box beam ' s temperature stress of longitudinal direction and transverse direction with different conformation are analyzed, it finds that there is largish temperature tensile stress in the bottom of top deck and the haunch of box beam increase temperature tensile stress in the bottom of top deck. the paper makes a study of different thermal effects resulted from several kinds of closed rigid frame
根據大量實測溫度場結果建議採用一個有利於理論推導的指數函數的公式來擬和箱梁體內的溫差分佈，既貼近實測數值，計算又比較簡單；通過對空腹式剛架拱橋尤溪洲大橋所在地夏季、秋季、冬季的溫度場及溫度應力的實測，以及與本文所提出計算方法的理論解進行的分析比較，證實了本文計算方法的正確，同時改進了已往混凝土箱梁溫度自應力的計算方法。Combining with the performances of danshan bridge, discussing the methods on the construction controlling and calculation of cable - stayed bridge, this paper raises an efficient construction controlling system, and realizes collecting construction data of the real bridge and technical information. by analyzing on the difference of theoretical calculation and real construction state, the author determines to take self - adapting construction controlling method which uses kalman filter method to identify and adjust construction parameters. by getting rational construction state from forward iteration method, this paper, taking concrete creep effect in consideration, raises a rational scheme to pre - remain deformation and adjust cable force
結合丹山橋的結構特點，通過對斜拉橋施工控制及結構計算方法的探討，提出了有效的施工控制系統，實現了對實橋施工數據和技術信息的採集；通過分析理論計算與實際施工狀態的差異，確定了以卡爾曼濾波法作為施工參數識別與調整的自適應施工控制方法；通過正裝迭代法確定其合理施工狀態，並考慮混凝土的徐變效應，提出了合理的預留拱度和索力調整方案。The scale and height of rolling - concrete are spread increasingly, such as the technique studied recently that the 300 meters high gravity dam and the 200 meters high arch dam, which requires more experience in the damming technique, construction crafts and mechanization
目前，碾壓混凝土壩的規模和高度正在日益擴大， 300m級的碾壓混凝土重力壩和200m級的碾壓混凝土拱壩的研究正方興未艾，對碾壓混凝土築壩技術、施工工藝和機械化程度的要求也更高。Trough the analysis of stabilization safety on tengzigou arch dam, some conclusions are obtained in the following : ( 1 ) tengzigou arch dam is safe under normal poll level ; ( 2 ) stabilization safety factor of tengzigou arch dam is about 4 - 5 ; ( 3 ) it is proved that combinatorial reinforcement measures are effective and feasible
對藤子溝拱壩的數值計算和模型試驗分析表明： （ 1 ）藤子溝水電站在正常蓄水位作用下，壩體和兩岸壩肩是穩定的； （ 2 ）藤子溝拱壩的整體安全度大概為4 5左右； （ 3 ）東北院提出的對左岸泥巖層挖除處理並用混凝土置換的加固除險措施經研究表明該加固措施是有效、可行的。Because its complex of mechanics characteristic, shape of geometry and boundary condition, safety of the high arch dam under normal load is what engineers are concerned about
因其受力特徵、幾何形狀、邊界條件等均較復雜，所以，高拱壩在正常荷載作用下的安全度，無疑是工程設計人員所關心的主要課題。But the excess the springing quantum of the pc beam due to continued evolution of concrete creep, which influenced the normal performance of structure, has been an important question puzzling the engineering technicians all the while
但是混凝土徐變的不斷發展帶來過度的起拱，影響結構的正常使用，一直是困擾工程技術人員的重要問題。Based on the previous research results, the author takes nonlinear temperature load equivalent to linear temperature load and calculates temperature stress by fem. it analyses the whole and the part temperature effect on rigid - framed arch bridge and compares different thermal stress of different bridge structure by the simplified methods. the research offer advices for this new style bridge
本文在總結前人工作的基礎上，分析探討將非線性溫度荷載等效為線性溫度荷載，同時採用有限元計算溫度應力的簡化方法；並利用這種計算方法對剛架拱橋的整體和局部的溫度效應以及不同橋型溫度效應的不同進行了分析比較，為這種新橋型的工程設計提供參考，還通過實測結果驗證上述方法的正確性，並進行了修正。In the analysis, a cfst arch ( single tube ) is first divided into a finite number of straight beam elements. according to the virtual work principle and the modified newton - raphson iteration method the tangent stiffness matrix considering double nonlinear properties is established. with regard to the non - equilibrium forces, the material nonlinear property along the height of the section and the length of the element is considered and the computation accuracy is improved as a result
本文首先將拱肋劃分為一系列的直梁單元，運用虛功原理和修正newton - raphan數值迭代演算法的基本原理準確推導了拱肋直梁單元的非線性切線剛度矩陣；在不平衡力方面考慮了沿截面高度和單元長度方向材料非線性的發展過程，提高了計算精度；再根據得到的切線剛度矩陣採用荷載增量步內修正newton - raphan迭代的增量迭代法進行了求解。Abstract : cable - stayed is used to cable suspension, but cable force is calculated by manual, and only for less than 5 segments, and the prescion is poor. this paper puts forward “ zero moment method ”, which can not only calculate more segmental soupe force, but both temporary joint and fixed joint during construction. the mechanical concept is clear, and it is easy for calculating. it is fit for program, and the illustrations prove that the methods are right
文摘:斜拉扣掛在纜索吊裝中經常運用，但扣索索力多採用手工計算，且多用於5段以內的吊裝，計算復雜，精度低.本文提出「零彎矩法」 ，可計算任意多段扣索索力，既可計算拱肋在施工過程中各節段臨時鉸接，又可計算各節段固結的情況，將兩種連接方式統一成一種計算方法，力學概念清楚，計算簡便，適宜程，文中最後用示例證實本方法的正確性It is said that the stochastic perturbation method basically could not fulfil the requirement of dynamical random response problems. however, so far in the dissipative systems, this is not the case. thirdly, the unified approach is combined with the orthogonal polynomial approximation
3 ）將統一解法，與正交多項式逼近方法結合起來，指出文獻中流傳的採用正態pdf來描述隨機結構參數的缺陷，並先後提出了拱形概率密度與更具有一般性的? pdf模型，並分別與chebyshev多項式逼近、 gegenbauer多項式逼近相配合，構成了一套具有廣泛適應性的解法。分享友人