Results of experimental researches of reinforced concrete retaining walls

Abstract

Relevance. Hydroelectric facilities include reinforced concrete retaining walls. They are intended to protect the main structures from the collapse and sliding of soil massifs. Retaining walls are characterized by significant size, relatively low content of reinforcement, the presence of horizontal interblock seams, which considerably affects the features of the work and the state of retaining walls. The normative documents that were in force during the design and construction of most retaining walls (the second half of the last century) did not fully take into account the features of the retaining walls, as a result of which long-term operation revealed deviations from the design premises, including excessive displacement of the top of the walls, the disclosure of horizontal interblock joints, which exceeded the design values. In a number of cases, reinforced concrete structures of retaining walls were reinforced in areas of interblock joints. The aim of the work is to conduct experimental studies of reinforced concrete retaining walls, including taking into account their reinforcement by inclined reinforcing bars. Methods. The technique of experimental studies of hydraulic engineering reinforced concrete structures was applied in accordance with regulatory documents and the developed program of experimental studies of reinforced concrete retaining walls. The results obtained showed the opening of horizontal interblock joints, the formation of inclined cracks emerging from the joints. An increase in the strength of reinforced concrete structures of retaining walls and a decrease in their deformability due to reinforcement by inclined rods in the area of the interblock weld were recorded.

Practical implementation of the engineering method for determining the stress state in horizontal sections of reinforced concrete retaining walls

“…Таким образом, была разработана инженерная методика, которая позволяет рассчитать величины напряжений в бетоне, а также в лицевой и в тыловой арматуре подпорной стены [26,27]. Разработанная инженерная методика была применена при определении компонентов напряженного состояния горизонтальных сечений эксплуатируемых низовых подпорных стен водоприемника ГАЭС.…”

“…Результаты и их обсуждение. Для определения напряжений в арматуре и бетоне подпорных стен из железобетона по горизонтальным сечениям предлагается инженерная методика расчета [26].…”

Deformation and Strength Characteristics for the Calculation of Structures Based on Fiber-Reinforced Concrete Composites

“…In the production of reinforced concrete structures, traditional methods of structural reinforcement with steel flat grids or bulk frames made of rods or ropes are used. This reinforcement method has a number of disadvantages, for example, the formation of structure inhomogeneities, voids, which reduces the operational characteristics of finished products [3,4].…”

“…An alternative method of reinforcement is dispersed one, in which micro reinforcement (reinforcing fibers) is introduced into the concrete mix, after solidification of which these fibers remain distributed over the entire volume of concrete and are included in the work of structures during operation [3][4][5].…”

Improving the compressive strength of lightweight cylindrical concrete column with basalt fiber reinforced polymer acting under imposed load

“…To achieve this "weak beam strong column" objective, the columns of a building can be made stiffer against deformation by wrapping them with fiber-reinforced polymers (FRP). Research work was done to conduct experimental studies of reinforced concrete retaining walls, including considering their reinforcement by inclined reinforcing bars [11]. The results obtained from the research showed the opening of horizontal interblock joints, the formation of inclined cracks emerging from the joints.…”