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1.
Umary Jamal * 《东南大学学报》1998,(1)
ＡＴｈｅｏｒｅｔｉｃａｌＳｔｕｄｙｔｈｅＥｆｅｃｔｏｆＯｐｅｎｉｎｇｓｉｎＩｎｆｉｌＷａｌＰａｎｅｌｓｏｎｔｈｅＢｅｈａｖｉｏｒｏｆＳｔｒｕｃｔｕｒｅｓＵｍａｒｙＪａｍａｌ（ＣｏｌｅｇｅｏｆＣｉｖｉｌＥｎｇｉｎｅｒｉｎｇ,ＳｏｕｔｈｅａｓｔＵｎｉｖ... 相似文献
2.
LIU Tao ZhANG Zhi-mei XIE Li-min Department of Civil Engineering Shanghai University Shanghai China Shenzhen Laiyingda Industry Trade Co. Ltd Shenzhen China 《上海大学学报(英文版)》2000,(Z1)
1 IntroductionThe criterion and rellablllty of the st~turalaselsmlc design depends mainly on the acknowledgement about the seismic response and the damagemechanism of the structure Generally, there are threeapproaches through which the stfUctural aselsmlccapabllltles is studied The first is the Investigation ofthe real earthquake disaster, the second isexperimental research, the third is academic analysisThe practical aselsmlc capabllltles and the behaviorof damage can be found out through th… 相似文献
3.
孙翠兰 《河北工业大学成人教育学院学报》2007,22(4):49-52,62
轻钢骨混凝土结构是一种新型的结构体系,它自重轻,安装方便,保温性能好,因而有广阔的发展余地和使用空间。本文分别对轻钢骨模网混凝土的工作性能、轻钢骨剪力墙的抗剪性能做了深入的理论研究。用3片缩尺轻钢骨剪力墙模型进行了试验研究,并推导了轻钢骨剪力墙的抗剪承载力公式。由于模型试验构件少,数据有所不足,本文又采用ADINA有限元分析软件进行分析,提出有关轻钢骨砼剪力墙轴压比设计的建议。 相似文献
4.
A 1/10 scale model of reinforced conorete (R.C.) frame structure was tested on the 15t-shaking table of State Key
Laboratory, Tongji University. The structural prototype was a 10-storey office building that was damaged in the 1985 Mexico
major earthquake[1]. The original acceleration records in the earthquake were applied as the input waves In the test. The dynamical
test model was designed according to the general law of similarity, and the effect of the shortage of artificial quality was
considered. The model was carefully made of fine gravel concrete and galvanized iron wire. The damage of test model is in good
agreement with that of archetypal building in the experiment. 相似文献
5.
OpenSees is a well-recognized open source platform with high compatibility, and it has a well-developed fiber ele- ment method to cope with nonlinear structural analysis. Fiber reinforced polymer （FRP） confined concrete can effectively improve the seismic performance of concrete structures. However, sophisticated constitutive models for FRP confined concrete are not available in the current version of OpenSees. In this paper, after reviewing several typical FRP confined concrete constitutive models, a modified constitutive model for FRP confined concrete in circular sections was proposed based on Lain and Teng （2003）＇s model with four main modifications including the determination of FRP rupture strain, ultimate condition, envelope shape, and hysteretic rules. To embed the proposed constitutive model into OpenSees is a practical solution for engineering simulation. Hence, the secondary development of OpenSees New UserMat was briefly demonstrated and a set of critical steps were depicted in a flow chart. Finally, with the numerical implementations of a series of FRP confined concrete members covering a wide range of load cases, FRP confinement types and geometric properties, the utility and accuracy of the proposed model compared with Lam and Teng （2003）＇s model and new material secondary development in OpenSees were well validated. 相似文献
6.
利用ANsYs结构分析软件对钢筋混凝土空心剪力墙与同体积普通钢筋混凝土剪力墙进行抗震分析,建立钢筋混凝土空心剪力墙和同体积的实心钢筋混凝土剪力墙简易模型进行时程分析,得到钢筋混凝土空心剪力墙和同体积实心钢筋混凝土剪力墙的顶点位移和层间位移,进行比较之后,得知钢筋混凝土空心剪力墙的位移要小于同体积实心钢筋混凝土剪力墙． 相似文献
7.
《天津大学学报(英文版)》2015,(3)
In order to improve the seismic performance, deformation ability and ultimate load-carrying capacity of columns with rectangular cross section, engineered cementitious composite(ECC) is introduced to partially substitute concrete in the edge zone of reinforced concrete columns and form reinforced ECC/concrete composite columns.Firstly, based on the assumption of plane remaining plane and the simplified constitutive models, the calculation method of the load-carrying capacity of reinforced ECC/concrete columns is proposed. The stress and strain distributions and crack propagation of the composite columns in different states of eccentric compressive loading are analyzed. Then, nonlinear finite element analysis is conducted to study the mechanical performance of reinforced ECC/concrete composite columns with rectangular cross section. It is found that the simulation results are in good agreement with the theoretical results, indicating that the proposed method for calculating the load-carrying capacity of concrete/ECC composite columns is valid. Finally, based on the proposed method, the effects of ECC thickness, compressive strength of concrete and longitudinal reinforcement ratio on the mechanical performance of reinforced ECC/ concrete composite columns are analyzed. Calculation results indicate that increasing the thickness of ECC layer or longitudinal reinforcement ratio can effectively increase the ultimate load-carrying capacity of the composite column with both small and large eccentricity, but increasing the strength of concrete can only increase the ultimate loadcarrying capacity of the composite column with small eccentricity. 相似文献
8.
采用ABAQUS有限元软件对各种强度等级下各龄期钢筋混凝土梁的受扭性能进行分析。各龄期混凝土的本构关系采用塑性损伤模型,受拉指标采用断裂能。有限元分析结果表明:各龄期混凝土的抗扭承载力随龄期的增长而增长,开裂前早龄期混凝土梁的抗扭承载力主要由混凝土承担,钢筋的贡献很小;前3d是混凝土扭矩增长最快的主要时间段,开裂扭矩和极限扭矩达到28 d的60%左右。最后,根据有限元参数分析结果,在现行规范的基础上提出了早龄期混凝土梁开裂扭矩和极限扭矩的修正公式。 相似文献
9.
李根林 《淮北职业技术学院学报》2007,6(3):93-94
以山区砖石拱桥的加固实例为工程背景,对砖石拱桥原拱圈下增设拱圈、原拱上增设钢筋混凝土拱圈、钢杆件拉结、钢板箍与螺栓锚固等几种加固方法的施工工艺流程、适用范围、注意事项等进行描述和探讨。 相似文献
10.
浅析钢筋混凝土框架结构设计 总被引：3，自引：0，他引：3
张月静 《邢台职业技术学院学报》2010,27(5):100-101
建筑结构设计是建设工程设计的重要环节,是保障建筑结构安全、实现建筑使用功能的灵魂。在我国现在的多高层建筑中,钢筋混凝土结构应用最普遍,其中钢筋混凝土框架结构是最常用的结构形式。为了使结构设计更加完善,本文依据GB 50010-2002混凝土结构设计规范和GB 50011-2001（2008年版）建筑抗震设计规范,针对框架结构设计中容易疏忽的几个问题进行了初步探讨,可供设计人员参考。 相似文献
11.
The earthquake-resistant property of reinforced concrete members depends on the interaction between reinforcing bars and surrounding concrete through bond to a large degree,In this paper a general system aimed at dealing with the failure analysis of reinforced concrete columns strengthened with carbon-fiber-reinforced plastic(CFRP) sheets including bond-slip of the anchored reinforcing bars at the foot of the columns is presented.It is based on the yield design theory with a mixed modeling of the structue,according to which the concrete material is treated as a classical two-dimensional continuum ,whereas the longitudinal reinfocing bars are regarded as one-dimensional rods including bond-slip at the foot of the columns,In shear reinforced zones both the shear CFRP sheets and transvers reinforcing bars are incorporated in the analysis throuth a homogenization procedure and they are only in tesion ,The approach is then implemented numerically by means of the finite-element formulation,The numerical procedure produces accurate estimates for the loading-carrying capactiy of the shear members taken as an illustrative application by correlation with the experimental results,so the proposed approach is valid. 相似文献
12.
INTRODUCTION Creep is an internal characteristic of concrete under long-term load. A long time has elapsed since the first discovery of concrete creep in 1907 by Hatt. Many researches have been devoted to this complex problem ever since. However, despite major suc-cesses, the creep phenomenon is still far from being fully understood, even though the phenomenon has occupied some of the best minds in the field, such as Glanville, Dischinger, Troxell, Pickett, Neville, etc. Creep phenome… 相似文献
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14.
Based on a series of previous studies, an experiment on the integral seismic behavior of a 1/3 scaled model of two-bay and three-story reinforced concrete frame with split columns at lower two stories is performed under cyclic loading. The original columns at lower two stories of the model frame are short columns and they are replaced by the split columns. The hysteresis curves between the horizontal cyclic load and the lateral displacement at the top of the model frame, indicate that under the cyclic loading, the model frame undergoes the process of cracking, yielding, and maxi-mum loading before being destroyed at the ultimate load. They also indicate that the model frame has better ductility, and the ratio of the ultimate displacement to the yielding displacement, reaches 6.0. The yielding process of the model frame shows that for the frame with split columns, plastic hinges are generated at the ends of beams and then the columns begin yielding while the frame still possesses the bearing and deformation capacity. The design idea of directly changing the short col-umn to long one in the reinforced concrete frame may be realized by replacing the short column with the split one. 相似文献
15.
Francisco J. Martinez-Martin Fernando Gonzalez-Vidosa Antonio Hospitaler Víctor Yepes 《浙江大学学报(A卷英文版)》2012,13(6):420-432
This paper describes one approach to the design of reinforced concrete (RC) bridge piers, using a three-hybrid multi-objective simulated annealing (SA) algorithm with a neighborhood move based on the mutation operator from the genetic algorithms (GAs), namely MOSAMO1, MOSAMO2 and MOSAMO3. The procedure is applied to three objective functions: the economic cost, the reinforcing steel congestion and the embedded CO2 emissions. Additional results for a random walk and a descent local search multi-objective algorithm are presented. The evaluation of solutions follows the Spanish Code for structural concrete. The methodology was applied to a typical bridge pier of 23.97 m in height. This example involved 110 design variables. Results indicate that algorithm MOSAMO2 outperforms other algorithms regarding the definition of Pareto fronts. Further, the proposed procedure will help structural engineers to enhance their bridge pier designs. 相似文献
16.
INTRODUCTION There is increased need in recent years for strengthening or rehabilitation of existing reinforced concrete structures adversely affected by overloading, construction material deterioration, seismic loads, structural deformation, etc. An effective method for increasing the shear capacity of reinforced concrete columns is the use of externally bonded carbon fiber reinforced plastic (CFRP) systems (ACI, 2002). FRP systems were first applied to reinforced concrete col-umns i… 相似文献
17.
基于建筑信息模型（Building Information Modeling, BIM)）概念,以福州市规划设计研究院新建大楼为实际案例,应用Autodesk Revit软件将原有CAD图纸进行BIM结构钢筋和机电模型建置,并提出BIM技术虚拟仿真过程中发现的问题。研究结果表明:（１）BIM技术可实际解决工程常常出现钢筋复杂节点、机电管道碰撞的问题;（２）机电系统进行Revit翻模时,不能按原CAD路径绘制,族库不全需建族完善。该研究成果可为后期施工决策提供技术支持,并有助于相关行业人士学习与借鉴。 相似文献
18.
INTRODUCTION Reinforced concrete elements with box section are commonly used in horizontal subsystems and in vertical support of bridge structures. The horizontal structural members normally have box section and top flange. The vertical supports of the bridge usually have a box section also. To simplify the deduction of such structural member under combined forces, the box sections without top flange are discussed here. Fig.1 shows the typical section types of reinforced concrete members.… 相似文献
19.
This paper describes the effects of fire on durability of reinforced concrete structures, and points out that fire not only damages the chemical composition and physical structure of concrete by high temperature, but also leads to an additional risk due to the generation of polyvinyl chloride (PVC) combustion gases. A mathematical model is proposed to calculate chloride ingress profiles in fire damaged concrete, so as to explore the service life prediction of the structure. Rapid Chloride Migration (RCM) test was carried out to determine the chloride diffusion coefficients for the application of the mathematical model. Finally, the detected results of a reported case testified to the validity of the mathematical model. 相似文献
20.
Fibre-reinforced polymer （FRP） composites were widely utilized in civil engineering structures as the retrofit of reinforced concrete （RC） columns. To design FRP jackets safely and economically, the behaviour of such columns should be predicted first. This paper is concerned with the analysis and behaviour of FRP-confined RC circular and rectangular short columns subjected to eccentric loading. A simple design-oriented stress-strain model for FRP-confined concrete in a section analysis was first proposed. The accuracy was then proved by two test data. Following that, a parametric study including amount of FRP confinement, FRP strain capacity, unconfined concrete strength and shape of column section is provided. Some conclusions were obtained at the end of the paper. The work here will provide a comprehensive understanding of the behaviour of FRP-confined concrete columns. The simplicity of the model also enables a simple equivalent stress block to be developed for direct use in practical design. 相似文献