Based on extensive investigation of construction technique history of chinese ancient buildings, the structure method, structure developing history and seismic behavior of chinese ancient timber structure buildings are analyzed in several respects of the structural system and form. through a series of experiments on constituent parts of chinese ancient timber building structure, including the tests on the corbels and brackets called dougong subjected to low cyclic reversed loadings, the tests on the wooden frame using the tenon - mortise joints as connections of column and beam subjected to low cyclic reversed loadings, the tests on vibration isolation effect of friction and slippage between column footing and their socle base, and a series of shaking table tests on a chinese ancient timber structure palace building mode under artificial earthquake at serving conditions, destroyed conditions and reinforced conditions, many valuable results of structures such as moment - curvature hysteretic loops of dougong structure and tenon - mortise joints under low cyckc reversed loadings, the static function, the seismic performance, energy dissipation, vibration reduction, energy - loss mechanism, nechanicalmode and failure mode were studied. aplenty of valuable parameters of the structure system were obtained, such as the natural period of structure, vibration modes, damping ratio, factor of vibration isolation, oscillate amplitude of ineitial accebration, velocity and displacement, magnitude of slippage, and the mechanism of structure failure and collapse etc. based on these research, the complete analysis of ancient timber structure under earthquake were carried out in which including mechanism analysis method, calculating mode, strength analysis of members and joints, strengthening methods for serving damaged ancient timber structure buildings were also taken into account
依照宋代《營造法式》建造了抬梁式殿堂木結構構件及結構模型,對中國古代木結構中的典型構造如:柱腳在礎石頂面平擱簡支、柱架榫卯連接、柱高不越間之廣、側腳、生起、斗拱等的構造機理及結構功能進行了量化分析和實驗研究: (一)通過木柱石礎靜摩擦試驗,測定了柱腳與石礎古鏡面間的摩擦系數及摩擦力隨上部結構荷載變化的規律; (二)通過單柱承載力試驗,測定了古建築中木柱的受力變形特徵、破壞模式、及模型材料的變形模量、極限承載力、極限變形等參量; (三)通過柱架低周反復荷載試驗,測定了柱架的抗側移
剛度、柱架恢復力特性及滯回曲線、榫卯張角
剛度及其變化規律、柱架及榫卯的極限承載力和極限變形、及榫卯減振參數; (四)通過斗?低周反復荷載試驗和受壓試驗,測定了古建築木構件與木構件間摩擦系數,斗?抗側移
剛度,斗?恢復力特性及滯回曲線,斗?抗壓極限承載力及受力變形規律; (五)通過抬梁式殿堂間架模型振動臺試驗,測定了殿堂木構架結構自振周期,地震反應振形、阻尼特性及阻尼比;按結構分層特點對柱腳、柱頭和斗?層上的屋
蓋的地震反應採用多點同步測量,對柱根滑移、榫卯變形、斗?的變形、復位、耗能減振參數等進行了定量分析。
With all his force he loosed another shaft at guy ' s helmet, in which the broken end of the first arrow still stuck
他全力對
蓋的盔甲射出另一隻箭,
剛好擊中第一支箭破碎的末端。
Diamond micro powder ( abrasive grain = 0. 5 u m ) is added to the plating liquor, after many experiments, we discover every parameter of composite electro - brush plating, includes voltage of brush plating, relative velocity of between brush plating pen and workpiece, adding quantity of diamond micro powder etc. finally steel balls millstone covering with ni - fe - diamond composite electro - brush plating film is produced successfully
試驗中加入粒度為w0 . 5的金
剛石微粉,通過反復多次的試驗,確定出了鎳-鐵-金
剛石復合電刷鍍中的各項工藝參數,包括電壓、鍍筆和工件的相對速度、金
剛石微粉的加入量、溫度等等工藝參數;成功的試製成了覆
蓋有鎳-鐵-金
剛石復合電刷鍍層的鋼球研磨板。
Furthermore, the isoline maps of mean wind pressure coefficients and rms wind pressure coefficients of the structure under various wind directions are plotted. in the matter of theoretical analysis, modeling with finite element method, using the local mean wind pressure coefficients and time history of fluctuating pressures determined in wind tunnel, the wind - induced dynamic responses for long - span grid roof structures are calculated in frequency domain and time domain separately
在理論分析方面,建立合理的有限元模型,利用
剛性模型風洞試驗獲得的各種不同情況下屋面各節點的平均風壓系數和脈動風壓時程,在頻域內和時域內進行了大跨網架屋
蓋結構的風振響應分析。
To this end, during the opening lines of the prologue, he had managed to hoist himself up by the pillars of the reserved platform on to the cornice which projected around the foot of its balustrade, where he seated himself, soliciting the attention and the pity of the throng by his rags and a hideous sore covering his right arm
所以,開場序詩
剛念頭幾句,他就利用那留給御使們專用的看臺的柱子,爬到了一個下部連接欄桿和看臺的檐板上,並坐了下來,故意顯露其破衣爛衫,顯露其一道
蓋滿整隻右臂的丑惡傷疤,以乞求觀眾的注意和憐憫。
I saw a rat sticking its head out of the manhole cover. it stared at me as if it had known me ! haaaaaaaa ! !
陶子: 「倉里滿,我
剛才看見一隻老鼠從窨井
蓋里伸出腦袋,看著我,好像認識我呢! 」
The method for design thin - wall core box cast - in - site concrete hollow floor using common structural computing software is put forward and the scale for the magnifying stiffness coefficient of the spandrel beam and middle beam is discussed
5 、提出了採用常用的結構計算軟體計算薄壁箱體現澆混凝土空心樓
蓋設計的方法,提出了邊梁和中梁
剛度放大系數的建議。
When they were buried and covered with a blanket of fresh feces ( fear is an excellent loosener of the bowels ), we let out the five pigs, bought at a greatly inflated price a few days earlier, and they rolled and kicked their way around, grunting their delight as only pigs can do in shit
我們將其埋好,再覆
蓋上
剛便溺出來的屎尿(恐懼是最佳的通便藥) ,牽來前幾天花高價買來的五頭豬,它們在地上翻滾,哼聲打鬧,只有在屎里的豬才會這么興高采烈。
Under the gleaming ornamentation of the case stood a long invalid chair, and in the chair, on snow - white, uncrumpled, freshly changed pillows, covered to the waist with a bright green quilt, pierre recognised the majestic figure of his father, count bezuhov, with the grey shock of hair like a lions mane over his broad forehead, and the characteristically aristocratic, deep lines on his handsome, reddish - yellow face. he was lying directly under the holy pictures : both his great stout arms were lying on the quilt
神的燦爛輝煌的金屬衣飾底下,放著一張伏爾泰椅,上面擺著幾個雪白的尚未揉皺的顯然是
剛剛換上的枕頭,皮埃爾所熟悉的他父親別祖霍夫伯爵的端莊的身軀就躺在這張伏爾泰椅上,一床鮮綠色的被子
蓋在他腰上,在那寬大的額頭上還露出獅子鬃毛般的白發,在那俊美的橙紅色的臉上,仍舊刻有高貴者特有的深深的皺紋。
Based on wind tunnel test and theoretical analysis, the vibration mechanism, vibration shape, dynamic response and equivalent wind load factor of the long - span grid roof of taizhou stadium subjected to wind excitation are analyzed systematically in this dissertation, and some valuable results are obtained. in the matter of wind tunnel tests, the distribution rules of roof under various wind directions are obtained through the data got from the wind tunnel tests for rigid model of long - span grid roof of taizhou stadium
在風洞試驗方面,通過對臺州體育中心屋
蓋剛性模型在模擬大氣邊界層風洞中進行的不同風向角下的風洞試驗所得數據的研究,獲得了結構在各種情況下的屋面風壓分佈規律,並且繪制了臺州體育中心屋
蓋在各個風向角下的屋
蓋平均風壓系數和脈動風壓系數分佈等值線圖。
Combined with a project financially supported by the construction bureau of hunan province, some studies on this floor have been carried out in this thesis. the valuable results achieved are outlined as below : 1. compared with the current concrete criterion, a method for the stiffness of thin - wall core box cast - in - site concrete hollow floor which is analyzed in this thesis is proposed
本文結合湖南省建設廳重點資助項目對薄壁箱體現澆混凝土空心樓
蓋進行研究,取得了的研究成果,如下: 1 、對薄壁箱體現澆混凝土空心樓
蓋的
剛度進行了分析,以《混凝土結構設計規范》為基礎,提出了現澆空心樓
蓋剛度和內力的簡化計算方法,其計算結果與已有的試驗結果吻合良好,使樓
蓋內力和變形的計算過程得以簡化。
The australian ' s participation had been in doubt after she was forced to undergo knee surgery a few weeks ago
幾周前皮特曼的膝蓋剛剛接受過手術治療,能否參加奧運會一直是個疑問。