低周反复荷载作用下PSRC梁力学性能试验研究

发布时间：2018-06-12 11:52

本文选题：预制装配式 + 型钢混凝土梁　；参考：《苏州科技大学》2017年硕士论文

【摘要】：型钢混凝土结构以其优越的力学性能备受建筑行业重视。然而其施工难度大,成本高,一直无法在工程中大规模推广。针对这一情况,本课题组提出预制装配式型钢混凝土(Prefabricated Steel Reinforced Concrete,简称PSRC)梁的概念。结合传统型钢混凝土梁与混凝土叠合梁的特点,将原本一次浇筑的构件分预制腹板与现浇翼缘两次浇筑,形成一种新型的结构形式。根据预制腹板截面形式的不同可分为U型、V型及矩型腹板PSRC梁。本文针对预制U型截面腹板PSRC梁开展低周反复荷载试验及理论分析,主要完成了以下研究工作:(1)针对三根预制U型截面腹板PSRC梁开展低周反复荷载试验,分析剪跨比及现浇部分混凝土强度对PSRC梁破坏特征、荷载-挠度滞回曲线、骨架曲线、应变规律、延性、变形恢复能力、强度衰减规律、刚度退化规律及耗能性能等抗震性能的影响。(2)与同期进行的两根相同设计参数的预制V型截面腹板PSRC梁及预制矩型截面腹板PSRC梁进行试验现象及数据对比,分析预制部分不同的截面形式对PSRC梁承载力及抗震性能的影响。(3)结合试验现象及数据,通过理论推导建立了PSRC梁受弯承载力及挠度计算公式。(4)结合理论推导与试验数据,建立了PSRC梁荷载-挠度三折线骨架曲线理论模型,并以此进行了扩大参数分析。
[Abstract]:Steel reinforced concrete (SRC) structure has attracted much attention of the construction industry for its superior mechanical properties. However, its construction is difficult, high cost, has been unable to be widely used in the project. In view of this situation, the concept of prefabricated steel reinforced concrete (PSRCc) beam is proposed. Combined with the characteristics of the traditional steel reinforced concrete beam and concrete composite beam, the members originally cast at one time are divided into precast web plate and cast-in-place flange twice to form a new structure form. According to the different sections of prefabricated web, it can be divided into U-shaped, V-shaped and rectangular web PSRC beams. In this paper, low cycle repeated load test and theoretical analysis are carried out for prefabricated U-section web PSRC beams. The following research work is mainly completed: 1) low cycle repeated load tests on three prefabricated U-section web PSRC beams are carried out. The failure characteristics of PSRC beam, load-deflection hysteresis curve, skeleton curve, strain law, ductility, deformation recovery ability and strength attenuation law of PSRC beams caused by shear span ratio and cast-in-situ concrete strength are analyzed. The effect of stiffness degradation law and energy dissipation performance on seismic performance is compared with two precast V-section web PSRC beams with the same design parameters and prefabricated rectangular web PSRC beams with the same design parameters. This paper analyzes the influence of different sections of precast parts on the bearing capacity and seismic behavior of PSRC beams. It combines the experimental phenomena and data, and establishes the formula for calculating the flexural capacity and deflection of PSRC beams by theoretical derivation, combining with the theoretical derivation and test data. The theoretical model of the load-deflection three-fold skeleton curve of PSRC beam is established, and the extended parameter analysis is carried out.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU317;TU398.9

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