Calibration of Nonlinear Dynamical Analysis for RC Frame-wall Structure with Slender Coupling Beams Considering Stiffness Reduction

Two 16-storey frame-wall structures with slender coupling beams in regions of Intensity 8(0.2 g),with and without considering the stiffness reduction of the coupling beams,were designed.Nonlinear dynamic response analyses of two typical frame-wall structures subjected to several ground motions were carried out.The analyses were based on the quasi-tridimensional program for nonlinear dynamic response analysis TS-EPA.The analyses led to the following conclusions: Under rare earthquake actions,the coupling beams in framewall structures yield first.This shows that the coupling beam in frame-wall structures is the member at the forefront of earthquake resistance.Comparison of the analytic results of two couples with and without considering the stiffness reduction of the coupling beam found that,in view of the dynamic response to and the requirement for ductility under rare earthquake motions,reducing stiffness causes a minor unfavorable influence on the dynamic response of frame-wall structures.     

Mechanical Properties of Concrete Cylinders Confined with CFRP Sheets Subjected to Axial Compression

Based on Drucker-Prager criterion with non-associated flow rule, numerical analysis of mechanical properties of concrete cylinders were carried out by using non-linear finite element method. The effect caused by various parameters such as wrap thickness, fiber orientation and concrete strength on axial mechanical properties of concrete cylinders is discussed. The results show that the results calculated by non-associated flow rule conform to that in the test. It is demonstrated that there is significant enhancement both in compressive strength and ductility of cylinders with the increase of wrap thickness. Moreover, the gain in axial compressive strength is observed to be higher for lower strength concrete and be highest in the cylinders wrapped with the hoop orientation.     

Nonlinear numerical simulation of steel reinforced concrete truss joints

This paper analyzes the steel reinforced concrete large span transfer truss joints using the finite element analysis software ANSYS, and get the joints deformation and the mechanics increase, such as deformation properties, stress distribution. The monitoring results during construction phase show that nonlinear numerical simulation analysis, which is in good agreement with the test results, is an effective method for the mechanical property analysis on this kind of structural components.     

初探水泥稳定砂砾的碾压机理施工方法

为保证稳定砂砾的密实度,采用以初压、振压和终压三个阶段碾压水泥稳定砂砾是合理的、必 要的,也是科学的。     

浅谈提高混凝土耐久性及防腐措施

无论是在土建工程还是在桥梁工程中,混凝土是用途最广、用量最大的建筑材料之一。近百年来,混凝土强度的不断提高成为它主要的发展趋势。     

冬季施工过程混凝土控制裂缝的预防措施

在我国寒冷地区,冬季建筑工程施工常常出现质量问题,即易出现混凝土裂缝和钢筋锈蚀等现象.该文有针对性地论述了三种预防措施.     

桥面垫层混凝土破坏与补强技术

该文在旧桥改造维修中,对桥面垫层混凝土破坏机理及补强技术提出了一些看法和措施建议,可供工程实际应用参考。     

浅议水泥混凝土路面裂缝的原因及防治

本文较详细地阐述了水泥混凝土路面产生裂缝的原因及在其施工过程中应注意的事项。     

沥青混凝土桥面铺装早期病害原因的分析

对混凝土桥梁沥青砼桥面铺装的早期病害及其原因进行了分析与研究，在总结当前国内桥面铺装结构主要方法的基础上，通过理论分析，提出了用有限元进行结构受力分析以及需要重点研究分析的几个方面的问题。     

桥面铺装用纤维混凝土耐久性试验与分析

试验以本地的材料为研究对象，针对寒区桥面铺装这一特殊应用领域要求，进行低掺聚丙烯纤维混凝土配合比设计及优选。然后对不同掺入量组成的低掺聚丙烯纤维混凝土抗渗、抗裂的耐久性试验研究，并对试验结果进行分析评价。