In this dissertation, considering the influence of transverse shearing deflection and noncoincidence of torsion center and gravity center, the equilibrium formulas of variable-curvature box-girder with rectangular cross section were established. Based on deformation expression of arbitrary point on the girder and relationship between inner forces and displacement equations, considering noncoincidence of torsional center and gravity center, the governing differential equations for variable-curvature box-girders were generalized.

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Waste draining pipe, offlet or drain pipe should be connected to the main pipe; each pipe should connect two valves with the most possible short valve-to-valve pipe length.

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Waste draining pipe,offlet or drain pipe should be connected to the main pipe; each pipe should connect two valves with the most possible short valve-to-valve pipe length.

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Said invented door plank storable and superposable screen window has left and right storage boxes for holding the screen roller made up by rolling up screen, and comprises latch hook, coupling bar, upper and lower guideways, the left and right storage boxes are freely fixed on the upper and lower guideways, according to the requirements the left and right storage boxes can be slided, and can be formed into square frame together with upper and lower guideways, and the screen can be spread and laid on said square frame so as to form the invented door plank storable and superposable screen window.

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Through field measurement for the contact pressure of box foundation with Ⅰ shaped plane of a high rise building on cobble subsoil, the distribution law of the contact pressure has been diagrammed. At the same time, the contact pressure has been calculated with finite compression layer model, which is well accordant with the measured result. The relative error of average value for the measured to the calculated contact pressure is 6.9%. This shows that the numerical calculation is right.

通過對西南交通大學(xué)某教學(xué)樓箱形基礎(chǔ)基底反力的實測結(jié)果，得出了&Ⅰ&形平面箱基置于密實卵石層上的基底反力分布規(guī)律_级大黄片，又用有限壓縮層地基模型對該箱基反力進行了計算，結(jié)果表明：實測反力與計算反力分布規(guī)律一致人人操人人摸黄色网站，實測反力平均值與計算反力平均值相對誤差為6.9％日韩黄色网站大全免费，也說明此法計算箱基反力是可行的。

This paper introduces some problems related to the crack control of the concrete box girder in the construction of railway passenger line, and connecting with the actual construction example of the box girder of Yongtaiwen Railway Passenger Line, probes into the geneses of the cracks on concrete box girder,and puts forward some corresponding control measures.

介紹了鐵路客運專線箱梁的施工過程中日本美女性高潮，有關(guān)箱梁混凝土的裂縫控制問題久久无码精品一级A片，結(jié)合甬臺溫鐵路客運專線箱梁的施工實例，探討了箱梁混凝土裂縫的成因亚洲毛片不卡aV在线播放一区二区，提出了相應(yīng)的控制措施免费在线观看的黄片。

On the basis of investigation and study, the author synthesizes the achievements of previous studies and analysis.

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The results show that the stress of clack box is lower than the yield limit of the material. The safety factor is between 1.8 and 3.2, and the distortion of clack box is in the permission scope. The static strength and stiffness satisfy the request, and the life of clack box exceeds 107, which meets the requirements.

研究結(jié)果表明，在3種載荷工況作用下閥箱應(yīng)力均低于材料的屈服強度日本在线一级特黄aa大片免费，其安全系數(shù)為1.8~3.2又大又粗的黄色视频，且閥箱的變形在允許范圍之內(nèi)，閥箱靜強度及剛度滿足要求开心五月天人人摸；閥箱疲勞壽命大于107a网在线观看视频，也滿足要求。

Based on the work flow of charging equipment, three worst work conditions of the clack box were defined. Then, based on thermal-structure coupled theory, the thermal-structure coupled of the clack box which suffered from mechanical and temperature load was analyzed using the powerful software ANSYS. The clack box's temperature field and stress field as well as the stress spectrum of danger area in actual working condition were obtained. Finally, based on crack initiation and crack extension theory, the clack box's fatigue life was predicted.

摘 要：根據(jù)裝料設(shè)備的工作流程国产迷晕暴力玩弄网站，確定閥箱3種最不利的載荷工況午夜免费在线污视频一区二区三区；基于熱－結(jié)構(gòu)耦合理論并利用有限元分析軟件ANSYS研究閥箱在溫度載荷和機械載荷作用下的熱－結(jié)構(gòu)耦合問題，得到實際工況下閥箱的溫度場在线视频小说图片一区、應(yīng)力場以及危險部位的應(yīng)力譜成人免费在线观看网址视频；依據(jù)裂紋萌生和擴展理論對閥箱進行疲勞壽命預(yù)測。

Presenting the calculating method of the space displacement model of skewed box girder, whit main ideas of: dispersing the skewed box girder into some skewed beam segments and further dividing those segments into some plate pieces according to their forms; describing the displacement functions in the plane of plate piece by assuming that the space displacements of any point in the joint line between the plate pieces are described by using Hermite interpolation functions and that two displacements in the plane of plate piece are linear in the cross direction; Using Hermite interpolation functions to describe the bending the displacement of the unit length transverse frame cutting longitudinal from the skew box girder segment; Finally, describing the space displacements of a point in the plate pieces by two displacements in the plane of the plate and one bending displacement of plate.

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