Research On Construction Technology Of Over-long Concrete Structure With Post-pouring Belt

With the social and economic development, there are more and more over-longconcrete structures applied in china. Due to the functional needs of the building, itrequires less or even no deformation joint in the structure. However, the over-longconcrete structure is not token pouring molding, but sub-pouring, post-pouring beltmethod at this time has been a very good application and development.Currently, because post-pouring belt method in the engineering practice is farahead of the theoretical study, so most of the designers reference to an existing designengineering practice, even strictly being in accordance with the existing engineeringpractices and not carefully analyzing. It not only reach the purpose of less thancontrolling cracks, but anti-caused cracks appeared in large numbers. This brings a lotof problems for the later use of the building.On the basis of research results in the summary of the previous, this article doesthe experiment about seismic behavior of post-pouring belt structure, which is lessstudied. This article has the main work in the following areas as follows：Firstly, this article introduces the action principle of post-pouring belt in theover-long concrete structure, and summary and analysis of research status aboutpost-pouring belt in the over-long concrete structure at home and abroad.On the basis of previous research results, From acrossing the post-pouring beltreinforced, settings form of post-pouring belt, setting post-pouring belt processing wayand the building structure form, this article summaries and analyzes post-pouringbelt factors in the effect of over-long concrete structure, to provide the theoretical basisfor the comprehensive understanding and application of post-pouring belt.Through the quasi-static test with frame and post-pouring belt frame of five, thisarticle studies the post pouring belt through the top longitudinal reinforcement,longitudinal reinforcement lap and the effect of additional longitudinal beam webreinforcement on the seismic performance. Failure pattern, hysteresis curve, skeletonframe curve, deformation capacity, stiffness degradation, energy dissipation capacity,deformation restoring capacity of the frame are compared and analyzed.The test results show that, the new and old concrete surface in the post-pouring beltis easy to form crack, and increasing the beam web additional longitudinalreinforcement can effectively avoid cracks running through the whole section; post-pouring belt increased additional longitudinal reinforcement is the most significanton the seismic behavior of frame, making positive effect on the deformation energydissipation capacity and deformation capacity, but it accelerates the framework of thestiffness degradation and increases the framework of the residual deformation; Steeloverlapping in the post-pouring belt slightly improve the framework of energydissipation capacity, accelerate the frame stiffness degradation and increase the frameresidual deformation, but had no significant effects on the seismic performance of theother frame; Steel through the framework in the post-pouring belt stiffness degradationand residual deformation has certain adverse effect, improves the effect on the ductilityof frame, but the frame energy dissipation effect.