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1. The study of the Italian ancient architecture of Farnese Theatre of Parma and its seismic vulnerability | |||
Federica Mulazzano,JIANG Qian,Luca Guardigli | |||
Civil and Architectural Engineering 04 December 2020 | |||
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Abstract:Built in 1608, the Farnese Theatre is located in the Palazzo Pilota in the old city of Palma, Italy. It has a history of over 400 years. Taking the ancient architecture of Farnese Theater in Parma, Italy as the research object, this paper investigates its architectural history, building materials and other information; The related building and structure drawing are made by laser 3D scanning survey; Through Ansys finite element analysis software, its three-dimensional analysis model is established, and its seismic performance is studied. The numerical results show that the maximum deformation along the longitudinal direction of the structure occurs at the bottom of the truss under earthquake action;whereas for earthquake along the transversal direction, the maximum displacement is along the bottom part of the principal and back facade and along the trusses that are positioned quite in the central part.Because the stiffness of the wooden parts is lower than that of the masonry corridor, the deformation of the wooden corridor and the wooden truss is more significant than that of the masonry wall plate. | |||
TO cite this article:Federica Mulazzano,JIANG Qian,Luca Guardigli. The study of the Italian ancient architecture of Farnese Theatre of Parma and its seismic vulnerability[OL].[ 4 December 2020] http://en.paper.edu.cn/en_releasepaper/content/4753111 |
2. Finite Element Analysis of a New Shikumen Lilong Double Unit | |||
Maria Vittoria Fratini,JIANG Qian,Luca Guardigli | |||
Civil and Architectural Engineering 23 May 2020 | |||
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Abstract:In the early twentieth century, the Little Tokyo district in northern Shanghai was partially included in an urban plan carried out by the Shanghai Land Investment. In 1930 the project coped with the increasing population, establishing two extended neighborhoods known as RuiKang Li and RuiQing Li. A double unit in RuiKang Li was selected to perform constructive assessments and structural analyses. The units, built according to the New Shikumen Lilong features, are investigated firstly from an architectural perspective and then from structural standpoint defining a multidisciplinary profile of the current study. Indeed, the main purpose is to clarify notions about construction technology to provide neat information for studying its structural behavior. Coherent linear static and dynamic analyses are achieved through the development of a consistent numerical model, based on assumptions and surveys, using ANSYS Mechanical R.15.0. | |||
TO cite this article:Maria Vittoria Fratini,JIANG Qian,Luca Guardigli. Finite Element Analysis of a New Shikumen Lilong Double Unit[OL].[23 May 2020] http://en.paper.edu.cn/en_releasepaper/content/4752196 |
3. Finite element analysis of mechanical properties of concrete-filled thin-walled steel tubular joints | |||
CHEN Juan,ZHOU Chengye | |||
Civil and Architectural Engineering 21 April 2017 | |||
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Abstract:With the development of large span bridge in China, large concrete-filled steel tubular truss and laced column structures appear constantly. The joints of these structures are mostly circular concrete-filled steel tubular (CFST) joints, and become thin-walled joints because the diameter-thickness-ratio of the chord is very large. In order to solve the problem of lacking of the theoretical basis on the mechanical properties of concrete-filled thin-walled steel tubular (CFTST) joints, refined finite element analyses were performed using ANSYS. The influence of geometrical parameters and loading conditions were analyzed to find the inherent pattern. The results showed that the ultimate capacities of CFTST specimens were smaller than that of CFST specimens with the same brace geometry and the same chord diameter under axial tension, axial compression, and in-plane bending, and the failure modes of CFTST and CFST specimens were different under axial tension and in-plane bending, while were basically the same under axial compression, however, the concrete crushing failure only occurred in CFTST joints, and did not generally appeared in the CFST ones. So the design method of CFTST joints and the CFST joints should be different. This research can not only provide scientific basis for the design of CFTST joints, but also effectively promote the application of CFTST truss and laced column in bridges, and can promote the improvement and development of the design theory of thin-walled steel structures. | |||
TO cite this article:CHEN Juan,ZHOU Chengye. Finite element analysis of mechanical properties of concrete-filled thin-walled steel tubular joints[OL].[21 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4726829 |
4. Finite element modelling and numerical investigation of multi-planar concrete-filled steel tubular KK joints | |||
CHEN Juan,ZHOU Chengye | |||
Civil and Architectural Engineering 21 April 2017 | |||
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Abstract:With the development of large span and heavy load modern engineering, concrete-filled steel tubular structures appear constantly. The joints of these structures are mostly multi-planar joints. In order to solve the problem of lacking of the investigation of multi-planar concrete-filled steel tubular (CFST) joints, the mechanical behaviour of CFST KK joints were studied through refined finite element simulation. Accurate finite element models of CFST KK joints were established by considering the material nonlinearity, the geometry nonlinearity, and the contact nonlinearity between the tube and the concrete. The spatial effect of multi-planar joints was be obtained by comparing with uni-planar joints. The FEM results showed that, the multi-planar carry-over effects had the maximum effect for the 60o CFST joints, the strength of multi-planar joints decreased compared with the planar joints, and the stiffness of them did not vary substantially. While for the 90o CFST joints, both the strength and stiffness of multi-planar joints did not vary substantially with the planar joints. This research can provide scientific basis for the design of multi-planar CFST joints, and effectively promote the application of CFST structures. | |||
TO cite this article:CHEN Juan,ZHOU Chengye. Finite element modelling and numerical investigation of multi-planar concrete-filled steel tubular KK joints[OL].[21 April 2017] http://en.paper.edu.cn/en_releasepaper/content/4726520 |
5. THE USE OF GLUED-IN RODS FOR THE REINFORCEMENT OF TIMBER STRUCTURES IN EUROPEAN COUNTRIES | |||
BLONDEL de JOIGNY Blanche,ZHANG Shengdong | |||
Civil and Architectural Engineering 29 August 2016 | |||
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Abstract:The woody structural elements represent a significant portion of old works and historical buildings, and the need for retrofit and strengthening them increases. Glued-in rods are an efficient way of providing stiff, high-capacity connections in timber structures. Those flexible joint systems have the advantages of high load transition, appropriate behavior in case of fire, easy application combined with a high level of prefabrication for fast installation. Besides, the aesthetic appearance of the finished joint also plays an important role. Many experiments were undertaken on this subject in Europe, but a common database about the designing instructions of glued-in rods was never encouraged. This paper aims at summarizing the different factors that can affect repairs made with glued-in rods and their influence on said repairs. | |||
TO cite this article:BLONDEL de JOIGNY Blanche,ZHANG Shengdong. THE USE OF GLUED-IN RODS FOR THE REINFORCEMENT OF TIMBER STRUCTURES IN EUROPEAN COUNTRIES[OL].[29 August 2016] http://en.paper.edu.cn/en_releasepaper/content/4702272 |
6. Design point of the first excursion problem of linear structures subjected to stochastic wind loads | |||
WANG Jia | |||
Civil and Architectural Engineering 23 December 2015 | |||
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Abstract:In this paper the first excursion problem of linear structures subjected to stochastic wind loads is considered. In the space of random variables introduced to model the stochastic excitation, the failure domain of the problem can be expressed as a union of quadratic elementary failure domains. In this paper, the procedures using gradient projection method are proposed for obtaining the design point of the quadratic elementary failure domain, which can provide some insights into enhancing the efficiency of the previously developed simulation method for the concerned first excursion problem. An illustrative example involving an along-wind excited steel building shows the performance of the proposed procedures. | |||
TO cite this article:WANG Jia. Design point of the first excursion problem of linear structures subjected to stochastic wind loads[OL].[23 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4673112 |
7. Analytical behaviour of concrete-encased CFST columns under cyclic lateral loading | |||
Qian Wei-Wu,Li Wei,Han Lin-Hai,Zhao Xiao-Ling | |||
Civil and Architectural Engineering 04 April 2015 | |||
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Abstract:The analytical behaviour of concrete-encased CFST (concrete-filled steel tube) columns under cyclic lateral loading is reported in this paper. A finite element analysis (FEA) model is developed to investigate the cyclic behaviour of such composite column. Comparisons are made between measured and predicted results on failure modes, load versus displacement relationships and ultimate strength. It is found that the proposed FEA model can reproduce the experimental results with a good accuracy. The full-range load-displacement relationships, the contact stress between steel tube and concrete and the axial load distribution among different components are analyzed using the verified FEA model. The cyclic behaviour of concrete-encased CFST is compared with that of conventional CFST and reinforced concrete (RC) columns. The parametric analysis is conducted to investigate influences of various parameters on moment-curvature (M-φ) envelope curves, including the material strength, steel ratio of inner CFST, longitudinal reinforcement ratio, stirrup characteristic value, tube diameter to cross-sectional width ratio (D/B) and axial load level. Finally, a hysteretic model for the M-φ relationship of concrete-encased CFST column is proposed.??? | |||
TO cite this article:Qian Wei-Wu,Li Wei,Han Lin-Hai, et al. Analytical behaviour of concrete-encased CFST columns under cyclic lateral loading[J]. |
8. EXPERIMENTAL STUDIES OF THE MECHANISM OF PARTICLE DAMPERS BASED ON A SDOF SYSTEM UNDER HARMONIC EXCITATION | |||
Yan Weiming,Wang Jin,Xu Weibing | |||
Civil and Architectural Engineering 04 February 2015 | |||
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Abstract:Particle damping technology is a new vibration passive control approach. It has a lot of advantages, such as flexibility of layout, the distributed damping it provided, the notable effect of vibration absorption, even at a wide frequency bandwidth. Hence, it is widely researched in aeronautics and mechanical engineering, however, is still in the immature period in civil engineering. In this paper, the single degree of freedom (SDOF) steel frame was designed and manufactured, and was taken as a study project. Compared the response of the original structure and the structure attached with particles under harmonic excitation, the influence of the parameters on the effectiveness of the seismic control such as the filled mass of the particle, the size of the particle, the friction coefficient at the bottom of the container, the intensity and the frequency of the excitation have been researched. The results showed that, with the increase of the particle mass, the effectiveness of the seismic control increased at the beginning and then decreased; the smaller particle showed better effect than the bigger one; under harmonic excitation, the friction coefficient had little effect on the performance of particle damping. In this paper, with the increase of the excitation intensity, the performance maintained at a certain level at first and then became worse. When the frequency of the excitation was smaller, the response of the structure with particles was likely to be higher than the structure without particles, on the contrary, when the frequency of the excitation was larger than or equal to the natural frequency of the primary structure, the response of the structure decreased greatly. All of this indicated that particle damping technology had a good effect in reducing the vibration of single-degree freedom structure; it had a wide prospect in civil engineering. | |||
TO cite this article:Yan Weiming,Wang Jin,Xu Weibing. EXPERIMENTAL STUDIES OF THE MECHANISM OF PARTICLE DAMPERS BASED ON A SDOF SYSTEM UNDER HARMONIC EXCITATION[OL].[ 4 February 2015] http://en.paper.edu.cn/en_releasepaper/content/4631385 |
9. MONTE CARLO SIMULATION WITH PIECEWISE RESPONSE SURFACE OF DEFLECTIONS OF REINFORCED CONCRETE BEAMS | |||
Tengfei XU | |||
Civil and Architectural Engineering 15 December 2014 | |||
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Abstract:Based on the nonlinear Finite Element model with degenerated beam element, combing Monte Carlo method with piecewise response surface, a hybrid stochastic deflection method of reinforced concrete beam is developed to give consideration to efficiency and accuracy. Piecewise response surface are adopted to avoid the errors between a single response surface and real unsmooth response function, due to the cracking of concrete. Variability of deflection of a set of test beams is evaluated by present model. The results demonstrate the capacity of the present model in computing the stochastic deflection of nonlinear reinforced concrete beams.????? | |||
TO cite this article:Tengfei XU. MONTE CARLO SIMULATION WITH PIECEWISE RESPONSE SURFACE OF DEFLECTIONS OF REINFORCED CONCRETE BEAMS[OL].[15 December 2014] http://en.paper.edu.cn/en_releasepaper/content/4623190 |
10. Experimental study and associated analysis of inner-stiffened cold-formed SHS steel columns | |||
Zhu Aaizhu,Zhu Hongping,Lu Yong | |||
Civil and Architectural Engineering 25 September 2014 | |||
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Abstract:Axial compression tests were conducted to investigate the compressive behaviour of cold-formed steel stub columns with relatively thick walls. Totally 10 square hollow section (SHS) specimens with wall thickness varied from 6mm to 10mm and nominal tubular length of 600mm were tested. Four inner-stiffener arrangements were considered to study the effects of the stiffeners on the behavior of the tubular specimens. A series of tensile coupons were cut from the cold-formed SHSs at different characteristic areas to obtain a full picture of the enhanced material properties due to the cold-forming process. The achieved sectional stresses from the SHS column experiments were compared with the predicted stresses using methods specified in relevant design codes, AISI and Chinese GB codes in particular, taking into account the enhanced material strength of the cold-formed steel. It is found out that the AISI method is slightly conservative in predicting the sectional stress of the specimens, whereas the GB method slightly overestimates the stress capacity. In general, both methods produce an acceptable prediction of the actual sectional stress, and they both tend to result in a better prediction for specimens with inner stiffeners. | |||
TO cite this article:Zhu Aaizhu,Zhu Hongping,Lu Yong. Experimental study and associated analysis of inner-stiffened cold-formed SHS steel columns[OL].[25 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4611340 |
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