Load combination forming method

Abstract

The invention relates to the field of house building structures and discloses a load combination forming method. The method comprises the processes that load conditions are created, and names, numbers, categories and coefficients needed for participating in combination are set; after the load conditions capable of being merged are merged, all the load conditions capable of serving as independent conditions to participate in load combination are intermediate conditions; the intermediate conditions which belong to the same category and are mutually exclusive are arranged together to be load intermediate types; a logic relation among the intermediate types and a logic relation among the intermediate conditions are set; intermediate type combination formulas are created automatically in a classified mode, and the combination formulas not meeting the logic relation among the intermediate types are deleted; the intermediate type combination formulas are traversed, the intermediate conditionsare automatically substituted into the intermediate types to form all possible intermediate condition combination formulas, and the combination formulas not meeting the logic relation among the intermediate conditions are deleted; the coefficients of the load conditions are filled up completely according to the categories of the combination formulas automatically; and the coefficients of the loadconditions in the combination formulas are calculated automatically, and repeated load combinations are removed in a classified mode.

Description

technical field [0001] The invention relates to the technical field of building structure analysis, in particular to a method for forming load combinations. Background technique [0002] Load combinations are an important part of structural analysis. After determining the load case, the structural engineer needs to clarify the combination of loads. A load combination without redundancy or missing items is a prerequisite for achieving safe, applicable, and economically reasonable analysis results. [0003] At present, there are three ways for structural engineers to realize load combination in the design process: 1) using structural analysis software that has solidified load combination; 2) using load combination tools provided by structural analysis software; 3) manually inputting load combination. The first method is a common choice for civil structures. Using structural analysis software that has solidified load cases and load combinations, you only need to directly inpu...

AI Technical Summary

Problems solved by technology

When the load case is more complicated, the priority is usually to simplify and combine the load cases and then input them into the structural analysis software at the expense of certain economic efficiency; but when the load cases cannot be simplified and combined into one When calculating the model, it is necessary to create multiple identical structural models to accommodate these loads and to obtain the envelope value of the calculation results of each model. At this time, the workload is heavy, the operation is cumbersome, and error-prone

The second method is to list the load combinations according to the principle of permutation and combination. The problem is that it is impossible to set reasonable rules to completely exclude redundant combinations. When the load conditions are more complex, many combinations that do not exist will be generated, which is difficult to identify And deletion, not only increases the time of analysis and calculation, but also may form overly conservative calculation results, and there is no process of forming load combination, which is not easy to trace and check

The third method is to manually input the final result of the load combination, which requires the engineer to manually complete the load combination in advance, which is extremely inefficient, error-prone, and inconvenient to check

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