土木工程论文摘要中英文

Improved nonlinear plastic hinge analysis of space frame structuresJY Richard Liew a,*, H Chen a, NE Shanmugam a, WF Chen ba Department of Civil Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260, Singaporeb School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USAReceived 5 January 1999; received in revised form 17 August 1999; accepted 25 August 1999AbstractThis paper is concerned with second-order plastic hinge analysis of three-dimensional frame The beam–column formulationis based on the use of stability interpolation functions for the transverse displacements, and considers the elastic couplingeffects between axial, flexural and torsional The developed computer program can be used to predict accurately theelastic flexural buckling load of columns and frames by modelling each physical member as one It can also be used topredict the elastic buckling loads associated with axial-torsional and lateral-torsional instabilities, which are essential for predictingthe nonlinear behaviour of space frame The member bowing effect and initial out-of-straightness are also considered sothat the nonlinear spatial behaviour of structures can be captured with fewer elements per Material nonlinearity is modelledby using the concentrated plastic hinge Plastic hinge between the member ends is allowed to Numerical examplesincluding both geometric and material nonlinearities are used to demonstrate the robustness, accuracy and efficiency of the proposedanalytical method and computer Ó 2000 Elsevier Science L All rights Keywords: Advanced analysis; Buckling; Nonlinear analysis; Plastic hinges; Space frames; I IntroductionTwo-dimensional (2-D) plastic hinge analysis of planeframes composed of members with compact section,fully braced out-of-plane, has been the subject for investigationin recent The theory for advanced inelasticanalysis of rigid and semi-rigid 2-D frames has beenwell developed and verified by tests [1,2] These analysismethods fulfil the requirements for the prediction ofmember strength and stability, with some constraints,satisfying the conventional column and beam–columndesign limit-state Although there have beenmuch work on the plastic hinge analysis of 3-D framestructures, the issues related to different theoretical andnumerical formulations and their accuracy and efficiencyin solving large frameworks are not addressed Theresearch presented in this paper is an extension ofadvanced analysis for 2-D frames [2] to 3-D frames [3–5], reflecting the current trend towards the rationalisationof advanced analysis * Corresponding改进非线性塑性铰空间框架结构的分析摘要：这份研究报告表明三维的框架结构与二维逻辑性塑性铰的关联，梁柱公式化的表述并嵌入横断面移动为基准，并考虑轴力、弯曲和扭力的移位之间的关系。发达的计算机程序作出通过每个物质成分作为一个基本部件做模型的塔器和框架可弯曲的负载量，它也能预报可弯曲负载量与轴向扭力和横向扭力的不稳定性的关联，这对预报非线性空间结构的作用是必不可少的，以便非线性空间结构的性能和部分成分一些原理能被输入计算机。重要的非线性通过使用浓缩的塑性铰方式被制作模型，塑性铰和成分末端是容许存在。数值的例子包括集合学和重要的非线性，两者习惯于证明目的的分析方法和电脑程序的稳定性，精确性。

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The rotation inertia is the object rotational inertia Isthe research, the design, the control rotation object movement ruleimportant project technology If the clock and watch balancewheel, the precise electric instrument moving coil build design, thegun artillery projectile, the electrical machinery rotor, the machinepart, the missile and the satellite launch and so on, all cannotneglect the rotation inertia the Therefore the determinationobject rotation inertia has the important practical 刚体 the rotation inertia size has in a big way displayed 刚体 therotational state difficulty degree, the object to some axis rotationinertia in a big way, when circles engraves the axis rotation, theangular speed is more difficult to change, the object to some axisrotation inertia size, is decided to the object quality, the shape and回转轴 the Regarding quality distribution even, the contour not complex objectmay extracts its rotation inertia from the external dimensions and itsthe quality, but is complex, the quality distribution non-uniformityobject to the contour only can obtain from the gyroscopic motionthrough the This graduation project will use two methodssurveys irregular object the rotation inertia, and will make (Whether calculates irregular object rotation inertiatheory value is key) Regarding the rotation inertia survey, continuously continuesto use three to hold the experiment, but holds in the experiment atthree always to have the certain This design goal is needs touse the different method survey rotation inertia, in the empiricaldatum foundation, to the data manifests the survey the accuracy,compared with the experimental technique, the experimental way whichchooses, makes every effort succinctly to rotate the inertia thesurvey experiment to be

Civil engineering in the long history of mankind "science and technology" as a system of civil engineering activity a substantial production processCivil engineering and construction of engineering science and technology it refers to the engineering construction collectively objects, namely, ground, built in underground engineering facilities also refers to water used materials, equipment and inspection in design, construction, maintenance, repair, etcAs an important basis for civil engineering discipline is the important attribute: comprehensive social economic and practical technology with human society advances art unity and development of civil engineering has been turned into a large-scale integrated disciplines and have many branches such as: the railway engineering construction engineering construction bridge engineering specialty structure of water and wastewater engineering of port engineering environment engineering disciplines such as water conservancy project consists of six major in civil engineering, architecture, city planning and civil engineering construction environment and water drainage engineering and equipment engineering road and bridge projectThrough a semester civil engineering introduction lessons I have deeply felt civil engineering covers a wide appreciates the previous achievements also realized as a civil engineer major responsibility, of course, we can't make brilliant achievements is immersed in the immobilized we shall also keep pace with The Times to go to think to dig the imagination to innovation in China's future as a civil engineer I want with civil engineering history with China's national conditions and the situation of the world talk of civil engineering road of the future!