Lui Yuxin Nanjing Architetural , Civil Engineering InstituteFeng Yiran Chongqing Institute of Architecture , Engineering
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.001
Abstract:This paper investigates the dynamic response of tall buildings subject toalongwind loading.According to the assumptions of the fundamental parame-ters,the function of the first vibration mode and that of the mass model,thecomputer program AWCTS is compiled.The availability of the procedure in thispaper is verified through practical calculations and comparison of results.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.002
Abstract:本文分析了2×3无粘结预应力混疑土网格梁的破坏机理,并提出了相应的极限强度分析方法.计算结果与试验结果吻合较好.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.003
Abstract:This paper presents a transfer matrix method for analysing dynamiccharacteristics of arches.The calculation models are the broken-line rigidframes with a series of mass points,which are simplified from the criginalstructures.The geometric stiffness and the axial deformation of arch are consi-dered in formulating its vibration transfer equation.Through application ofthe method,the vibration modes and the relative values of internal forces canbe obtained simultaneously as soon as the vibration frequencies of arch areknown.The simple and direct method developed may be easily calculated withmicrocomputer,and it has extensive usage with high precision.
Sun Renbo , Wang Daiyu , Lu Ping
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.004
Abstract:This paper uses the method of mixed-type series to derive the analyticsolution of cylindrical shell roof,being simply supported transversely,arbitra-rily restrained longitudinally and subjected to gereral transverse local loads.This paper also presents the analytic expressions of the solutions for somekinds of local load.Some examples of this kind of shell roof subjected to ainlined single force near the middle of it with free lorgitudinal edges aregiven.The computation shows that the convergence of the solution is woll
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.005
Abstract:This paper presents a new practical method for PI or PID industrial regu-lator optimal adjustments.This method is well feasible for off-line theoreticaladjustment of a control system and provided for closed loop identification withon-line regulator tuning.The proposed algorithm is based on approximationinversion of s-domain disturbance property of a control system by shiftedChebyshev's series.The PI or PID regulator parameter optimization usings-domain approximation representation of time-domain performance index of acontrol system is exclusively discussed with an example of using the algorit-hm.The introduced method is proved convenient to industrial process withhigh-order mathematical model.And it has both theoretical and engineeringsignificance.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.006
Abstract:本文利用Banach空间中的隐函数定理,对乘积空间等式约束问题建立了最优性的一阶必要条件(?)同时,对不等式约束问题讨论了Lagrange乘子的存在性以及最优解与鞍点的关系.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.007
Abstract:In the design of control system using simplex method for optimal multi-parameter,if the difference in number between the greatest and the smallestparameters is very great,the optimization process converges very slowly.Evenoptimal parameters can't be found at all.This paper studies the problem,analyses its cause and poses a resolution means.A testing example shows thatthis means can solve the above problem well.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.009
Abstract:Starting from the optical factors of Climate and on the basis of CIE formulasof brightness distribution for clear and overcast sky,this paper suggests a kindof formula which can be used to compute brightness distribution on average skybrightness.Besides,it proposes a simple method by which it is easy to carryout the design of natural lighting under the condition of average sky brightnessmodel.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.010
Abstract:On the basis of outlining our present situation of city water supply and itsgeological map compilation,this paper suggests a new principle which should befollowed in the compiling work of city water supply hydrogeological maps and themain contents of compilation and the ways of expression as one of the map com-piliing plans to be discussed in this field.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.011
Abstract:本文对动光弹性法在建筑工程力学中的应用作了初步探讨.对在冲击荷载作用下,圆盘和半无限平板中应力波的传播作了定性分析和讨论,对两个实验中的动静荷载下的等色条纹图分别作了比较,看出动态应力在结构物的局部区域的分布相当复杂,不能单一简化,有待于深入细致地研究.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.012
Abstract:This paepr mainly describes the conditions of disposal of municipal dom-estic refuse in onr country,and compares the methods of disposal of munic-ipal refuse with that of other countries.According to the specific conitionsof the cities in on our country,this paper also presents several suggestionson the collection,transport,disposal and use of municipal refuse.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.013
Abstract:This paper presents a sufficient and necessary condition for any planarembedding G(namely plane graph)of a planar graph to be Hamiltonian.If Gis Hamiltonian,a method that an adjacent edge subgraph method for finddingits Hamilton cycles are given.
1988, 10(1). DOI: 10.11835/j.issn.1674-4764.1988.01.014
Abstract:This paper presents that the soil cavity is a kind of the environmental-geological problem.The formation and development of the soil cavity arein close relationship with the construction of buildings.Some problemsof the soil cavity still need to be further studied.This paper proposes someviews on its concept,forming conditions,classification,mechanism,infl-uencing formation factors and development of different types.The investiga-tion of their appearance development and distribution is of significance inengineering geology and hydrogeology.
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