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Graduation Design Opening Report 3

1. Title of the project: Development of reinforced concrete multi-story and multi-span frame software 2. Project research background: The structural program to be written is the design of the concrete frame structure, and the construction refers to various houses and their associated structures. The building structure is a plane or space system in the building that can be subjected to a function by a number of components, that is, units constituting the structure such as beams, plates, columns, and the like. The calculation example uses the latest "Concrete Structure Design Code" GB50010-2002 issued by the Ministry of Construction. Compared with the original concrete structure design specification GBJ10-89, the new content accounts for about 15%, and the major revision accounts for about 35%. The part that maintains and basically maintains the original specification content accounts for about 50%. The specification comprehensively summarizes the practical experience since the original specification was issued, and draws on foreign advanced standard technology. 3. Project research significance: In the building, the structure is an important part of providing safe, reliable, durable, energy-saving materials and meeting the building functions of the building. It is closely related to the industrialization level of building materials, products and construction. new technology. New materials have an important role in promoting mechanization and automation. There are many mathematical formulas involved in structural calculations, and the specifications and standards involved are very fragmentary. And the amount of calculation is very large. In recent years, with the further development of the economy, the concentration of urban population, the tight land use and the fierce competition of commercial competition have further complicated the complexity of housing design, and many high-rise buildings have been continuously built. These buildings objectively require the auxiliary design of computer programs, both in terms of time and labor. In this way, the development of structural software is particularly important. Whether the structural design of a building is reasonable depends mainly on the structural system, structural arrangement, cross-sectional dimensions of the components, material strength grades, and whether the main structural structure is reasonable. These problems have been solved correctly. The calculation of structural calculations and construction drawings is another hard work of specific programming. Therefore, the hand calculation method originally used in schools will be applied to the specific program code. Not only how to use the structural knowledge learned to design the practice, but also how to implement these practices in code. 4. The literature research overview is different in different types of structural design. The key is to reduce leakage and reduce errors, as is the computer. Uniform Standard for Building Structure Design This standard is a basic principle for rationally unifying the structural design of various materials. It is to formulate structural load specifications for industrial and civil buildings, steel structures, thin-walled steel structures, concrete structures, masonry structures, and wood structures. Such design specifications and guidelines for designing foundations such as foundations and seismic buildings shall be formulated in accordance with the requirements of this standard. When formulating other civil engineering structural design specifications, the principles specified in this standard may be referred to. This standard applies to the entire structure of the building, as well as the components and foundations that make up the structure; applies to the stage of use of the structure, as well as the construction phase of the fabrication, transportation and installation of structural members. This standard introduces the modern structural reliability design theory, and uses the limit state design method based on the probability theory to analyze and determine that all the factors affecting the reliability of the structure are regarded as random variables, so that the design concepts and methods are based on statistical mathematics. On the basis of, and to measure the reliability of the structure based on the probability of failure determined mainly by statistical analysis, it belongs to the “probability design method”, which is an important evolution of design thinking. This is also the general trend of the development of engineering structure design methods in the contemporary international, and China's use of the probability limit state design method in the design specifications is by far the most widely used country. The common effects of the effects of the structure are: 1. Internal force. The axial force, that is, the normal tensile force or pressure on a certain section of the structure or member caused by the action; the shear force, that is, the tangential force on a certain section of the structure or member caused by the action; the bending moment, that is, the structure caused by the action Or the internal moment on a section of the component; the torque, that is, the force moment formed by the shearing force on the structure or a section of the component caused by the action. 2. stress. Such as normal stress, shear stress, principal stress, etc. 3. Displacement. A change in the position or orientation of a line in a structure or component caused by an action. 4. Deflection. A point on the axis or mid-surface of the component is displaced perpendicular to the axis or mid-plane in the plane of the bending action. 5. Deformation. The relative displacement between points in a structure or component caused by an action. The deformation is divided into elastic deformation and plastic deformation. 6. Strain: such as line strain, shear strain and main strain. Limit state The entire structure or part of a structure that exceeds a particular state cannot meet a functional requirement specified by the design. This particular state is called the limit state of the function. The limit states can be divided into two categories: 1. Carrying capacity limit state. A structural or structural member that reaches a maximum load carrying capacity or a limit state that is unsuitable for continued bearing deformation: a part of the entire structure or structure is out of balance as a rigid body; structural members or wires are broken due to excessive material strength, or excessive plastic deformation Not suitable for continued bearing; structural transformation into a maneuvering system; structural or structural components losing stability. 2. Normal use limit state. The structural or structural member reaches a limit state using a certain limit that is functionally permissible. When one of the following conditions occurs, it is considered to exceed the normal use limit state: deformation that affects normal use or appearance; local damage that affects normal use or durability; vibration that affects normal use; and other specific conditions that affect normal use. The basic task of structural design is to choose a reasonable balance between the reliability of the structure and the economy, and strive to achieve the predetermined safety under the specified conditions and within the specified service life at the lowest cost. Functional requirements such as suitability and durability. To achieve this goal, people have adopted a variety of design methods. From a modern point of view, it can be divided into two categories: fixed value design and probability design. 1. Fixed value design method. The main factors affecting structural reliability are regarded as non-random variables, and the design method of structural reliability is determined by empirically determined safety factor, namely deterministic method. This method requires that the load effect S of the structure should not be greater than the structural resistance R in any case, ie S ≤ R. Before the mid-1970s, this method was mainly used in China and abroad. 2. Probability design method: The main factor affecting structural reliability is regarded as random variable, and the design method of structural reliability is determined by statistically determined failure probability or reliability index, that is, non-deterministic method. This method requires the design of the structure according to the concept of probability, that is, the probability that the structural load effect 3 is greater than the structural resistance R should be less than an acceptable value. This method was proposed in the 1940s and entered the practical stage internationally in the late 1970s. Since the mid-1980s, the structural design method has begun to transition from the fixed value method to the probability method. Object-oriented programming makes the key technology for creating Windows programs easier is object-oriented programming, or OOP. This technique creates a reusable component, which is a component of the program. Several defined controls provide reusable objects for the program's visible interface. Examples of controls are text boxes, labels, and command buttons. An action that is triggered by a user or the operating system. Examples of events are keystrokes, clicks on a mouse, a time limit, or receiving data from a connection. A method code embedded in an object definition that defines how an object handles information and echoes an event. For example, a repository object has a way to open a recordset and move from one record to another. The basic element of an object program, which contains properties that define its characteristics, defines its tasks, and identifies the events it can echo. Controls and forms are examples of all objects in Visual Basic. The code segment that the procedure writes to complete the task. The process is usually used to reverberate specific events. The characteristics of a property object, such as size, position, color, or text. Attributes determine the appearance of an object and sometimes the behavior of the object. Attributes are also used to provide data to and retrieve information from objects. 5. Main content of the design The software is suitable for the design of cast-in-place reinforced concrete multi-story and multi-span frames. The work to be completed in the graduation design includes: 1. Modification of the plane steel frame analysis program The modification and supplement of the plane steel frame analysis program of the structural mechanics teaching and research section. Requirements: Write a program that automatically generates node coordinates and cell node numbers, or graphically enter a calculation sketch. Modify the program to suit the multi-case internal force calculation; design the appropriate human-machine interface according to the characteristics of the input and output data. The output should optionally display the end force and internal force diagrams of each component. 2. The component design program for the reinforced concrete multi-span frame mechanism is compiled according to the relevant specifications. The calculation method of various loads should be clarified, and the program for automatically generating the joint load and the unit load under various loads should be written on a sub-base. The seismic action is determined by the bottom shear method. The natural vibration period is determined by an empirical formula. Calculate the internal forces of the bars of the frame when the various loads act alone. The calculation structures are stored in their respective rod end force files. Plastic amplitude modulation is applied to the beam end bending distance under vertical load. Based on the rod end force file generated in the middle, the internal forces of the beam and column control section are calculated under various possible load combinations. The calculation results are stored in the appropriate file. The most unfavorable combination is selected from the generated files, and the section reinforcement is given. The determination of beam and column section reinforcement should consider the requirements of seismic design. Some of the more skilled students can use the Auto-CAD VBA to draw the beam and column reinforcement map according to the calculation results and construction rules. 5. The results of the graduation project should include: 1. The source code that can be run and can give the correct calculation results. In the floppy disk where the source program is stored, there should be at least one data file of the study, which can be basically unnecessary. In addition to typing data, the results are displayed correctly. 2. Software User Manual This is the software preparation method, operation steps and other necessary text materials for the user. 3. Software Specification This is the working file of the software author and is the basic information for software maintenance. This should include: a more detailed description of the work file, mechanics and engineering structure model on which the software is based, the main calculation formula and the meaning of the symbols used, and the textual description of the important algorithm: The structure of the program: the division of the module The relationship between each module and the function of each module; the source text with more detailed comments. The meaning of each identifier should be indicated. Description of the functions of the blocks, corresponding mathematical formulas and special algorithms; other information necessary for others to read your program according to the software manual. Partially skilled students can submit a beam and column reinforcement drawing. 4. The necessary evaluation of the rationality of the calculation results of the calculations is carried out for the evaluation of the programmed version; the experience and lessons in the software design process are summarized, and the design improvement suggestions are put forward. The source text of the above data is submitted in the form of a floppy disk, and the rest are printed by computer. 6. Progress plan The first week of graduation internship, visit the project, collect information. Second Week Demand Analysis: Describe the computer model and compile some preliminary software instructions. The third week of software design: the choice of module division scheme fourth week module design: data input interface design or data input interface design fifth week data input interface design sixth week module design: load calculation, corresponding internal force calculation Seven-week load calculation, corresponding internal force calculation Eighth week module design: beam reinforcement calculation of the ninth week beam load combination, determine the tenth week beam load combination of beam reinforcement, determine the eleventh week of the beam reinforcement module design: Column reinforcement calculation of the twelfth week column load combination, determine the column load combination of the thirteenth week of the column reinforcement, determine the soft rubber test of the tenth quarter of the column reinforcement or draw the beam and column reinforcement diagram with AutoCAD VBA; In the 16th week of the software test, the source program is compiled, the software description number and the user manual are written. In the 17th week, the software manual and the user manual are written to form the full file of the graduation design, and the defense is prepared. Week 18 graduation reply

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