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第2章罗折氏梁計算法第1节序言于19世纪末在德国的耶魯倍河曾架設有凸透鏡形弦杆的10孔跨度96.35米的鉄路桥,据說这新式样的桥梁系罗折氏(Lohse)所創造,这是所謂罗折氏梁(?)的先行者。罗折氏梁(譯者注:我們一般称为拱和梁的組合結构)从結构上看,是由上弦和下弦两根梁于两端連接起来,两弦之間并用沒有刚度的垂直杆連結而成,是所謂兰雅氏梁(?) (譯者注:上弦杆的慣性力矩比下弦杆非常小的一种罗折氏梁,我們一般称为刚性梁柔性拱的組合結构和充腹系杆拱中間性质的結构)。从广义解释之, 图—2.2式样的結构亦属于罗折氏梁。罗折氏梁为高次超靜定結构,其解法如布来希(Bleich)所著的书所述,須求一組联立方程的解。也就是說,对于有10个节间的罗折氏梁,須解10个联立方程,非常复杂。其后著者試利用方陣的解法,結果弄清
Chapter 2 Rogowski’s beam calculation Section 1 Introduction This new style of bridge is said to have a 10-hole span of 96.35 meters at the Yale River in Germany at the end of the 19th century. Lohse), the forerunner of the so-called Robertson (?). Rogowski’s beams are structurally linked by two beams, the upper and lower chords, connected at both ends by a vertical bar with no stiffness The so-called Lange beam (?) (Translator’s Note: The moment of inertia of the winding rod than the lower chord rod is a very small kind of Robertson, we generally refer to the combination of rigid beam flexible arch structure and filling the abdomen Arch arches of the nature of the structure). Explained broadly, the structure of Figure -2.2 also belongs to Robertsons. Rogowski beams are highly statically indeterminate structures, the solution of which, as described in the book by Bleich, requires the solution of a set of simultaneous equations. That is to say, for a Rogowski beam with 10 internals, it is complicated to solve 10 simultaneous equations. Later, the authors try to use the matrix solution, the results clear