梁枢果
结构风工程方面
个性化签名
- 姓名:梁枢果
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学术头衔:
博士生导师
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学科领域:
土木建筑工程其他学科
- 研究兴趣:结构风工程方面
梁枢果,教授,博士生导师,武汉大学结构风工程研究所所长。1976年12月于原武汉汽车工业大学(现为武汉理工大学)机械系毕业,1987年5月于原武汉工业大学(现为武汉理工大学)结构工程专业研究生毕业,获工学硕士学位。研究方向为结构动力学、结构抗风。毕业后到原武汉水利电力大学(现为武汉大学)工作,一直从事结构风工程方面的科学研究,重点从事高层建筑、高耸与大跨屋盖结构风振响应分析与抗风设计方面的理论与实验研究。1994年7月至1995年7月在澳大利亚悉尼大学风工程中心公派留学访问,在知名风工程专家K.C.S.Kwok教授的指导下研究高层建筑三维风振响应的理论分析方法和风洞试验技术。2001年7月至2001年10月在加拿大西安大略大学边界层风洞实验室公派留学访问,在著名风工程专家B.J.Vickevy教授指导下研究高层、高耸结构气动弹性效应的风洞试验识别技术与分析方法。1993年11月晋升为副教授,1998年11月晋升为教授,2002年6月遴选为博士生导师。2001年1月至2005年1月任武汉大学工程力学系主任。现任中国空气动力学学会风工程委员会委员,中国土木工程学会桥梁与结构工程学会风工程委员会委员,湖北省力学学会副理事长兼学术委员会主任,湖北省灾害防御学会理事,湖北省振动工程学会理事,“地震工程与工程振动”期刊编委,湖南大学风工程中心学术委员会委员。
获奖情况:2004年获教育部提名国家自然科学二等奖,排名第一(获奖项目:高层建筑、高耸与渡槽结构抗风设计理论与方法,获奖者:梁枢果,李秋胜,李正农,获奖证书号:2004-072);1996年获原国家教委科技进步三等奖,排名第三(获奖项目:水箱制振理论及其在工程结构抗风设计中的应用,获奖者:瞿伟廉,顾明,梁枢果,项海帆,获奖证书号:1996-475);另获湖北省自然科学优秀学术论文二等奖(1)、三等奖(2)各一次;获原武汉水利电力大学科技进步二等奖三次(1)。
发表论文情况:在国际、国内学术刊物上发表结构风工程领域的学术论文六十余篇,被SCI、EI、ISTP检索25篇。
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9
【期刊论文】Mathematical model of acrosswind dynamic loads on rectangular tall buildings
梁枢果, Shuguo Lianga, *, Shengchun Liua, Q.S. Lib, Liangliang Zhangc, Ming Gud
Journal of Wind Engineering and Industrial Aerodynamics 90(2002)1757-1770,-0001,():
-1年11月30日
By investigating acrosswind forces on rectangular cylinders withvarious side ratios atnormal attack angle in a boundary layer wind tunnel, this paper presents empirical formula ofacrosswind force spectra, RMS lift coefficients and Strouhal numbers of rectangular tallbuildings, and coherence functions of acrosswind force are also probed. Thus, a completeanalytical model of acrosswind dynamic loads on rectangular tall buildings is established. Thismodel is in good agreement withth e experimental results obtained by wind tunnel tests; so it isreliable and applicable. A calculation method based on this model can be developed toevaluate wind-induced acrosswind responses of rectangular tall buildings in frequencydomain.
Tall buildings, Acrosswind dynamic load, Wind tunnel test, Lift coefficient, Acrosswind force spectrum
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梁枢果
空气动力学学报,2002,20(2):233~245,-0001,():
-1年11月30日
本文对于u形渡槽槽体结构模型进行了风漏实验研究,得出了u形渡槽槽体结构的风压分布和风载体型系数。风洞试验结果表明u形渡槽槽体的风压分布和风载体形系数同槽体的高宽比和流场状况有关,在同一流场状况下槽体的风载体形系数随着槽体的高宽比变化。本文的试验结果为渡槽结构的抗风设计提供了参考依据。
渡槽, 风工程, 风洞实验
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【期刊论文】CALCULATION OF VERTICAL DYNAMIC CHARACTERISTICS OF TALL BUILDINGS WITH VISCOUS DAMPING
梁枢果, Q. S. LI, * J. Q FANG and A. P. JEARY
Ira. J. Solid Struclures Vol. 35, No.24. pp. 316-3176, 1998,-0001,():
-1年11月30日
The magnitude of the vertical component of earthquake ground motion is often aboutone-third of the horizontal component. Thus, it is necessary to calculate vertical dynamic charac-teristics of tall buildings and high-rise structures in design stage for certain cases. In analysing freevibrations of tall buildings and high-rise structures, it is possible to regard such structures as acantilever bar with variable cross-section. In this paper, the differential equations of free longitudinalvibrations (in vertical direction) of bars with variably distributed mass and stiffness consideringdamping effect are established. The damping coefficient of a bar is assumed to be proportional toits mass, and the general solutions of mode shapes of damped distributed parameter systemsare reduced to Bessel's equations by selecting suitable expressions, such as power functions andexponential functions, for the distributions of stiffness and mass. An approach to determine thenatural frequencies and mode shapes in vertical direction for tall buildings with variably distributedstiffness and variably distributed mass is proposed. The presented method is also applicable to thefree longitudinal vibration analysis without considering damping effect (damping coefficient invibration equations is equal to zero). A numerical example shows that the computed values of thefundamental longitudinal natural frequency and mode shape by the proposed method are close tothe full scale measured data. It is shown through the numerical example that the selected expressionsare suitable for describing the distributions of stiffness and mass of typical tall buildings. A com-parison between undamped structural dynamic characteristics and damped natural frequencies,mode shapes is made in this paper.
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梁枢果, Q. S. LI*, K. YANG, , N. ZHANG, C. K. WONG AND A. P. JEARY
Struct. Design Tall Build. 11, 129-153(2002),-0001,():
-1年11月30日
This paper describes some results obtained from full-scale measurements of wind effects on a super-tall building,Di-Wang Tower, located in Shenzhen, China. This tall building has 79-storeys with a height of approximately324 m. Field measurements including wind speed, wind direction and wind-induced acceleration responses havebeen made. The amplitude-dependent characteristics of damping are obtained by using the random decrementtechnique from the detailed analysis of the field acceleration measurements. The main objective of this paper is topresent detailed investigations into the effects of nonlinear damping on the dynamic responses of the tall buildingsubjected to various types of applied loads based on the measured amplitude-dependent damping characteristics.The predicted dynamic responses of the building obtained by using the measured damping characteristics werecompared with those computed by using constant damping parameters assumed by the structural designers. It isconcluded from the investigations that knowledge of actual damping characteristics are very important in theaccurate prediction of the dynamic responses of a tall building when the major harmonic components of theapplied loads overlap with the lowest natural frequencies of the building. The design damping level for tallbuilding structures currently used by structural engineering practitioners appears to be high and not conservative.Copyright
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【期刊论文】Torsional dynamic wind loads on rectangular tall buildings
梁枢果, Shuguo Liang a, *, Q.S. Li b, Shengchun Liu a, Liangliang Zhang c, Ming Gu d
Engineering Structures 26(2004)129-137,-0001,():
-1年11月30日
Wind-induced dynamic torque on rectangular cylinders with various side ratios is investigated through a series of model tests ina boundary layer wind tunnel. Based on the experimental investigation, this paper presents empirical formulae of torque spectra,RMS torque coefficients and Strouhal number, as well as coherence functions of torque. An analytical model of wind-induceddynamic torque on rectangular tall buildings is established accordingly. Comparisons of the results from the proposed model andthe wind tunnel measurements verify the reliability and applicability of the developed model for evaluation of torsional dynamicwind loads on rectangular tall buildings. A calculation method is presented based on the proposed model to estimate wind-inducedtorsional responses of rectangular tall buildings in the frequency domain.
Tall building, Vibration, Wind tunnel test, Wind effect, Torsional load
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【期刊论文】Damping in buildings: its neural network model and AR model
梁枢果, Q.S. Li*, D.K. Liu, J.Q. Fang, A.P. Jeary, C.K. Wong
Engineering Structures 22(2000)1216-1223,-0001,():
-1年11月30日
The results of full scale measurements of damping as well as other researches on damping show that damping in buildings exhibits randomness and amplitude dependent behaviour in the case of tall buildings subjected to dynamic loading. In this paper, based on full scale measurements of damping in a tall building, a time series analysis method (TSA) is employed to obtain the relationship between damping and vibration amplitude. Then, two models of damping in a tall building, the artificial neural network (ANN) model and the auto-regressive (AR) model, are established by employing ANN and AR methods, and used to predict the damping values at high amplitude level, which are difficult to obtain from field measurements. In order to get high accuracy, a genetic algorithm strategy is employed to aid in training the ANN. Comparison analysis of the neural network model and the AR model of damping is made, and the results are presented and discussed.
Full-scale measurements, Damping, Artificial neural networks, AR model, Genetic algorithm, Tall buildings
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【期刊论文】EVALUATION OF 2D COUPLED GALLOPING OSCILLATIONS OF SLENDER STRUCTURES
梁枢果, Q. S. Li†, J. Q. Fang and A. P. Jeary
Campaters & Strucares Vol. 66 No.pp. 513-523, 1998,-0001,():
-1年11月30日
The necessary conditions for the occurrence of 2D coupled galloping oscillations and adescription of the set of general differential equations for 2D coupled galloping vibrations are estab-lished in this paper. A procedure to predict the 2D coupled galloping oscillalions is proposed. Windloading was treated as a stochastic process including mean and fluctuating components caused by at-mospheric turbulence. The formulae and the procedure presented permit a better assessment of gallop-ing oscillations of a prismatic structure which has the same natural frequencies in the directions of thetwo orthogonal horizontal axes. The effects of turbulence on 2D coupled galloping are investigated. Itis shown that 2D coupled galloping oscillations mainly occur in the cross-wind direction. The effect ofthe turbulence integral scale on the onset wind velocity of 2D coupled galloping oscillations is negli-gible. However, the turbulence integral scale has certain influences on the rms response both in thealong-wind and the cross-wind directions when the wind velocity is equal or close to the onset wind vel-ocity for galloping. An increase in the turbulence integral scale in the range of 10--40 m considered inthis paper increases the galloping response.
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【期刊论文】FIELD MEASUREMENTS OF WIND EFFECTS ON THE TALLEST BUILDING IN HONG KONG†
梁枢果, Q. S. LI*, Y. Q. XIAO, , C. K. WONG AND A. P. JEARY
Struct. Design Tall Spec. Build. 12, 67-82(2003),-0001,():
-1年11月30日
Central Plaza has a height of approximately 374m and is 78-storeys tall. It is the tallest structure in Hong Kongand was the highest reinforced-concrete building in the world when it was built several years ago. This paperdescribes some results obtained from the full-scale measurements of wind effects on Central Plaza. The field datasuch as wind speed, wind direction and acceleration responses have been measured during the close passage ofseveral typhoons in recent years. Detailed analysis of the field data is conducted to investigate wind effects on thetall building. The full-scale measurements are compared with the wind tunnel results. The amplitude-dependentcharacteristics of damping that were obtained by using the random decrement technique are investigated on thebasis of the field measurements. Copyright
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【期刊论文】Stability of tall buildings with shear-wall structures
梁枢果, Q.S. Li*
Engineering Structures 23(2001)1177-1185,-0001,():
-1年11月30日
An analytical model of a flexural-shear plate is proposed herein for the purpose of buckling analysis. In this paper, tall buildingswith shear-wall structures and with narrow rectangular plane configuration are modeled as flexural-shear plates for buckling analysis.The governing differential equation for buckling of a flexural-shear plate with varying cross-section is established. Using appropriatetransformations, the equation is reduced to an analytically solvable equation by selecting suitable expressions, such as power functionsand exponential functions, for the distribution of stiffness along the height of the plate. The exact solutions for buckling ofa flexural-shear plate with variable stiffness are derived. A numerical example shows that the present methods are easy to implementand are efficient.
Stability, Buckling, Plates, Tall Building
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