Method for determining optimal reasonable finished bridge state of deck type beam-arch combined rigid frame bridge
A technology of girder-arch combination and bridge state, which is applied to arch bridges, bridges, bridge parts, etc., can solve the problems of poor alignment of the main girder in the bridge state, unreasonable force of the structural system, low material utilization rate, etc., to increase utilization High efficiency, saving investment costs, and clear thinking
Pending Publication Date: 2022-03-01
林同棪国际工程咨询(中国)有限公司 +1
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[0006] The purpose of the present invention is to provide a method for determining the optimal and reasonable completion state of an upwardly-supported beam-arch composite rigid frame bridge, so as to solve the problem of insufficient material utilization due to the lack of research on the structural system and mechanical behavior of the current upwardly-supported beam-arch composite rigid-frame bridge. Low efficiency, poor engineering economy, unreasonable stress on the structural system, and poor alignment of the main girder in the completed bridge state
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[0032] like figure 1 The method for determining the optimal and reasonable completion state of the top-through beam-arch composite rigid frame bridge shown includes the following steps:
[0033] S1: According to the characteristics of the structural system of the upwardly connected beam-arch composite rigid frame bridge, determine the invariant and variable variables of the upwardly connected beam-arch composite rigid frame bridge, draw up the reasonable value range of the variable, and set the initial value, step length and end value;
[0034] S2: According to the characteristics of the structural system of the top-supporting beam-arch composite rigid frame bridge, determine the key control points of the reasonable completion state of the bridge, and determine the evaluation index of the reasonable completion state of the bridge and the target limit of the evaluation index according to the key control points;
[0035] S3: Establishing a finite element analysis model accordin...
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The invention discloses a method for determining the optimal reasonable bridge forming state of a deck-type beam-arch combined rigid frame bridge, which can efficiently and accurately find the optimal reasonable bridge forming stress state and the optimal reasonable bridge forming line shape of the deck-type beam-arch combined rigid frame bridge by controlling the bridge forming state of the whole structure system according to key points. The method comprises the following steps: establishing a finite element model of the beam-arch combined rigid frame bridge, accurately simulating a stress state in a construction stage, performing calculation and analysis by applying a forward iteration method, and judging whether key strength technical parameters and key rigidity technical parameters of the deck type beam-arch combined rigid frame bridge meet target limit values or not; the most reasonable side-mid span ratio of the main beam, the rise-span ratio of the lower chord arch and the arch axis line shape can be accurately determined, the optimal beam height value of the key section is determined, the utilization rate of materials is greatly increased, the economical efficiency of engineering is improved, and a large amount of investment cost is saved; the method is clear in thought and high in applicability and has great popularization value.
Description
technical field [0001] The invention relates to a method for determining the optimal and reasonable completed state of an overhead beam-arch composite rigid frame bridge. Background technique [0002] my country is a country with many mountainous areas, and the area of mountainous areas accounts for about 2 / 3 of the country's land area. When the main span of bridges across mountainous river valleys exceeds 200m, the traditional prestressed concrete continuous rigid Beam web cracking and other diseases are no longer applicable. [0003] The top-supported beam-arch composite rigid frame bridge is a structural system combination of prestressed concrete continuous rigid frame and top-supported arch to form a self-balancing stress-bearing system without thrust, which can improve mid-span deflection and web cracking, and improve Structural rigidity, a new type of composite bridge that achieves greater spanning capacity. This bridge type fully integrates the advantages of "bendin...
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IPC IPC(8): G06F30/13G06F30/23E01D4/00E01D19/02E01D19/00
CPCG06F30/13G06F30/23E01D4/00E01D19/02E01D19/00
Inventor 闫福成赖亚平陈晓虎乔云强陈培新李璘周学勇李亚勇
Owner 林同棪国际工程咨询(中国)有限公司